stackforge
/
cachemonkey
Code Issues Proposed changes

Retire stackforge/cachemonkey

This commit is contained in:
Monty Taylor 2015-10-17 16:02:38 -04:00
parent 79924d0403
commit e3246a432f
49 changed files with 5 additions and 4957 deletions
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8
.gitignore vendored
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.coverage
*.egg
*.egg-info
*.pyc
*.swp
.testrepository
.tox
cover/*

8
.testr.conf
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[DEFAULT]
test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-160} \
${PYTHON:-python} -m subunit.run discover -t ./ ./cachemonkey/tests $LISTOPT $IDOPTION
test_id_option=--load-list $IDFILE
test_list_option=--list

23
README.rst
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cachemonkey
===========
This project is no longer maintained.
What is it?
-----------
The contents of this repository are still available in the Git source code
management system. To see the contents of this repository before it reached
its end of life, please check out the previous commit with
"git checkout HEAD^1".
A service for managing pre-caching of VM images in Nova.
1. Determine what images to pre-cache
2. Signal nova-api to cache images
3. Profit
Details
-------
Juno summit session:
https://etherpad.openstack.org/p/juno-nova-image-precaching
Related nova-spec:
https://review.openstack.org/#/c/85792/

0
cachemonkey/__init__.py
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cachemonkey/auth.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from keystoneclient.v2_0 import client
from oslo.config import cfg
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
opts = [
cfg.StrOpt('url', help='Auth system endpoint URL'),
cfg.StrOpt('username', help='Username for auth'),
cfg.StrOpt('password', help='Password for auth'),
cfg.StrOpt('tenant', help='Tenant name'),
cfg.StrOpt('region', help='Region'),
cfg.BoolOpt('insecure', default=False,
help='Skip SSL certification validation')
]
# register 2 groups: one for a non-priviledged user, and one for an admin user
CONF.register_opts(opts, group='auth')
CONF.register_opts(opts, group='admin_auth')
class Client(object):
def __init__(self, group='auth'):
self.group = group
cfg_group = getattr(CONF, group)
kwargs = self._config(cfg_group)
if cfg_group.tenant:
kwargs['tenant_id'] = cfg_group.tenant
LOG.warn(kwargs)
self.keystoneclient = client.Client(insecure=cfg_group.insecure,
debug=True,
**kwargs)
def auth(self):
if not self.keystoneclient.authenticate():
raise Exception('Failed to auth with keystoneclient')
@property
def catalog(self):
return self.keystoneclient.service_catalog
@property
def tenant(self):
cfg_group = getattr(CONF, self.group)
return cfg_group.tenant
@property
def token(self):
return self.keystoneclient.auth_token
def _config(self, group='auth'):
# check for presence of required config options
kwargs = {}
url = group.url
if not url:
raise ValueError('Missing required url for auth')
kwargs['auth_url'] = url
username = group.username
if not username:
raise ValueError('Missing required username for auth')
kwargs['username'] = username
password = group.password
if not password:
raise ValueError('Missing required password for auth')
kwargs['password'] = password
# the region scopes the catalog object for easier endpoint
# identification
region = group.region
if not region:
raise ValueError('Missing required region for auth')
kwargs['region_name'] = region
return kwargs

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cachemonkey/cacher.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
from oslo.config import cfg
from cachemonkey import discover
from cachemonkey.openstack.common import importutils
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
opts = [
cfg.StrOpt('lister_class',
default='cachemonkey.lister.glance.GlanceLister',
help='Class to determine which images get pre-cached'),
cfg.StrOpt('fetcher_class',
default='cachemonkey.fetcher.glance.GlanceFetcher',
help='Class to determine how to fetch images.'),
cfg.StrOpt('distributor_class',
default='cachemonkey.distributor.glance.GlanceFetcher',
help='Class to determine how to fetch images.'),
cfg.StrOpt('data_dir', default='/var/lib/cachemonkey',
help='Directory containing image data'),
]
CONF.register_opts(opts, group='cachemonkey')
class Cacher(object):
def __init__(self):
self.lister = importutils.import_object(CONF.cachemonkey.lister_class)
self.fetcher = importutils.import_object(
CONF.cachemonkey.fetcher_class)
self.discoverer = discover.ComputeDiscoverer()
def cache(self):
self.images = []
images = self.lister.images()
for image in images:
filename = self._get(image)
self.publisher.publish(image, filename)
# HACK(belliott) - just process first image for testing
break
# update set of known computes
self.discoverer.discover()
# TODO(belliott) prep for distribution and distribute
#self.distributor.distribute(image, filename)
def _get(self, image):
# first see if the image was previously downloaded
d = os.path.join(CONF.cachemonkey.data_dir)
if not os.path.exists(d):
os.makedirs(d)
filename = os.path.join(d, image['id'])
if os.path.exists(filename):
LOG.debug("Image %s was previously downloaded." % image['id'])
# TODO(belliott) also verify checksum
else:
self.fetcher.fetch(image, filename)
return filename

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cachemonkey/cmd/__init__.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import eventlet
eventlet.monkey_patch(os=False)

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cachemonkey/cmd/server.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sys
from oslo.config import cfg
import pbr.version
from cachemonkey.openstack.common import log as logging
from cachemonkey.openstack.common import service
from cachemonkey import service as cmservice
project = 'cachemonkey'
def _version():
vinfo = pbr.version.VersionInfo(project)
return vinfo.version_string()
def main():
version = _version()
cfg.CONF(sys.argv[1:], project=project, version=version)
logging.setup(project, version=version)
service_ = cmservice.Service()
launcher = service.ServiceLauncher()
launcher.launch_service(service_)
launcher.wait()

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cachemonkey/cmd/shell.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sys
from oslo.config import cfg
import pbr.version
from cachemonkey.openstack.common import log as logging
project = 'cachemonkey'
def _version():
vinfo = pbr.version.VersionInfo(project)
return vinfo.version_string()
def main():
version = _version()
cfg.CONF(sys.argv[1:], project=project, version=version)
logging.setup(project, version=version)
from IPython import embed
embed()

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cachemonkey/discover.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo.config import cfg
import requests
from cachemonkey import auth
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
opts = [
cfg.StrOpt('admin_auth_group',
default='admin_auth',
help='Config group to obtain compute admin credentials from'),
]
CONF.register_opts(opts, group='cachemonkey')
class ComputeDiscoverer(object):
def __init__(self):
self.authclient = auth.Client(CONF.cachemonkey.admin_auth_group)
#self.authclient.auth()
def discover(self):
# do a nova service-list
endpoints = self.authclient.catalog.get_endpoints()
endpoints = endpoints['compute']
if len(endpoints) > 1:
raise ValueError('More than one compute endpoint? %s' % endpoints)
endpoint = endpoints[0]['publicURL']
url = '%s/os-services' % endpoint
headers = {
'Content-type': 'application/json',
'Accept': 'application/json',
'X-Auth-Token': self.authclient.token,
}
r = requests.get(url, headers=headers, verify=False)
LOG.debug("Service list response code: %d" % r.status_code)
LOG.debug("Servicer list response: %s" % r.text)
# TODO(belliott) parse response, handle errors
return []

0
cachemonkey/fetcher/__init__.py
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38
cachemonkey/fetcher/glance.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from cachemonkey import glance
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
class GlanceFetcher(object):
"""Fetch image data via Glance."""
def __init__(self):
self.client = glance.Client()
def fetch(self, image, filename):
LOG.debug('Fetching image %s' % image['id'])
# glance client returns a iterator over the response
# downloads 64KB at a time.
resp = self.client.images.data(image['id'], do_checksum=True)
f = open(filename, 'wb')
for chunk in resp:
f.write(chunk)
f.close()

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cachemonkey/glance.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import glanceclient
from oslo.config import cfg
from cachemonkey import auth
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
opts = [
cfg.ListOpt('endpoints', help='Glance endpoint (override catalog)'),
cfg.StrOpt('scheme', help='Glance endpoint URL scheme', default='http')
]
CONF.register_opts(opts, group='glance')
class Client(object):
"""Glance client wrapper that handles auth and config."""
def __init__(self, auth_client=None):
if auth_client:
self.authclient = auth_client
else:
self.authclient = auth.Client()
self.authclient.auth()
self.endpoints = self._endpoints()
self.next_ = 0
def __getattr__(self, key):
client = self._client()
return getattr(client, key)
def _client(self):
# pick a glance endpoint via round-robin
endpoint = self.endpoints[self.next_]
self.next_ = (self.next_ + 1) % len(self.endpoints)
api_version = 2
token = self.authclient.token
return glanceclient.Client(api_version, endpoint, token=token)
def _endpoints(self):
# prefer endpoints provided via config
if CONF.glance.endpoints:
endpoints = CONF.glance.endpoints
else:
# fallback to getting a glance endpoint from the service catalog
catalog = self.authclient.catalog
image_endpoints = catalog.get_endpoints()['image']
LOG.debug('Image endpoints: %s' % image_endpoints)
if len(image_endpoints) > 1:
LOG.warn('Expected a single image endpoint, but there are %d' %
len(image_endpoints))
endpoint = image_endpoints[0]['publicURL']
endpoints = [endpoint]
if endpoints[0].find('://') == -1:
# prepend a scheme to each endpoint
scheme = CONF.glance.scheme
endpoints = map(lambda e: "%s://%s" % (scheme, e), endpoints)
return endpoints

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cachemonkey/lister/__init__.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

31
cachemonkey/lister/glance.py
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# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from cachemonkey import glance
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
class GlanceLister(object):
def __init__(self):
self.client = glance.Client()
def images(self):
LOG.debug('Fetching image list')
# list images to be cached.
images = self.client.images.list()
return images

0
cachemonkey/openstack/__init__.py
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cachemonkey/openstack/common/__init__.py
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#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import six
six.add_move(six.MovedModule('mox', 'mox', 'mox3.mox'))

145
cachemonkey/openstack/common/eventlet_backdoor.py
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# Copyright (c) 2012 OpenStack Foundation.
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import print_function
import errno
import gc
import os
import pprint
import socket
import sys
import traceback
import eventlet
import eventlet.backdoor
import greenlet
from oslo.config import cfg
from cachemonkey.openstack.common.gettextutils import _LI
from cachemonkey.openstack.common import log as logging
help_for_backdoor_port = (
"Acceptable values are 0, <port>, and <start>:<end>, where 0 results "
"in listening on a random tcp port number; <port> results in listening "
"on the specified port number (and not enabling backdoor if that port "
"is in use); and <start>:<end> results in listening on the smallest "
"unused port number within the specified range of port numbers. The "
"chosen port is displayed in the service's log file.")
eventlet_backdoor_opts = [
cfg.StrOpt('backdoor_port',
help="Enable eventlet backdoor. %s" % help_for_backdoor_port)
]
CONF = cfg.CONF
CONF.register_opts(eventlet_backdoor_opts)
LOG = logging.getLogger(__name__)
class EventletBackdoorConfigValueError(Exception):
def __init__(self, port_range, help_msg, ex):
msg = ('Invalid backdoor_port configuration %(range)s: %(ex)s. '
'%(help)s' %
{'range': port_range, 'ex': ex, 'help': help_msg})
super(EventletBackdoorConfigValueError, self).__init__(msg)
self.port_range = port_range
def _dont_use_this():
print("Don't use this, just disconnect instead")
def _find_objects(t):
return [o for o in gc.get_objects() if isinstance(o, t)]
def _print_greenthreads():
for i, gt in enumerate(_find_objects(greenlet.greenlet)):
print(i, gt)
traceback.print_stack(gt.gr_frame)
print()
def _print_nativethreads():
for threadId, stack in sys._current_frames().items():
print(threadId)
traceback.print_stack(stack)
print()
def _parse_port_range(port_range):
if ':' not in port_range:
start, end = port_range, port_range
else:
start, end = port_range.split(':', 1)
try:
start, end = int(start), int(end)
if end < start:
raise ValueError
return start, end
except ValueError as ex:
raise EventletBackdoorConfigValueError(port_range, ex,
help_for_backdoor_port)
def _listen(host, start_port, end_port, listen_func):
try_port = start_port
while True:
try:
return listen_func((host, try_port))
except socket.error as exc:
if (exc.errno != errno.EADDRINUSE or
try_port >= end_port):
raise
try_port += 1
def initialize_if_enabled():
backdoor_locals = {
'exit': _dont_use_this, # So we don't exit the entire process
'quit': _dont_use_this, # So we don't exit the entire process
'fo': _find_objects,
'pgt': _print_greenthreads,
'pnt': _print_nativethreads,
}
if CONF.backdoor_port is None:
return None
start_port, end_port = _parse_port_range(str(CONF.backdoor_port))
# NOTE(johannes): The standard sys.displayhook will print the value of
# the last expression and set it to __builtin__._, which overwrites
# the __builtin__._ that gettext sets. Let's switch to using pprint
# since it won't interact poorly with gettext, and it's easier to
# read the output too.
def displayhook(val):
if val is not None:
pprint.pprint(val)
sys.displayhook = displayhook
sock = _listen('localhost', start_port, end_port, eventlet.listen)
# In the case of backdoor port being zero, a port number is assigned by
# listen(). In any case, pull the port number out here.
port = sock.getsockname()[1]
LOG.info(
_LI('Eventlet backdoor listening on %(port)s for process %(pid)d') %
{'port': port, 'pid': os.getpid()}
)
eventlet.spawn_n(eventlet.backdoor.backdoor_server, sock,
locals=backdoor_locals)
return port

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cachemonkey/openstack/common/excutils.py
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# Copyright 2011 OpenStack Foundation.
# Copyright 2012, Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Exception related utilities.
"""
import logging
import sys
import time
import traceback
import six
from cachemonkey.openstack.common.gettextutils import _LE
class save_and_reraise_exception(object):
"""Save current exception, run some code and then re-raise.
In some cases the exception context can be cleared, resulting in None
being attempted to be re-raised after an exception handler is run. This
can happen when eventlet switches greenthreads or when running an
exception handler, code raises and catches an exception. In both
cases the exception context will be cleared.
To work around this, we save the exception state, run handler code, and
then re-raise the original exception. If another exception occurs, the
saved exception is logged and the new exception is re-raised.
In some cases the caller may not want to re-raise the exception, and
for those circumstances this context provides a reraise flag that
can be used to suppress the exception. For example::
except Exception:
with save_and_reraise_exception() as ctxt:
decide_if_need_reraise()
if not should_be_reraised:
ctxt.reraise = False
If another exception occurs and reraise flag is False,
the saved exception will not be logged.
If the caller wants to raise new exception during exception handling
he/she sets reraise to False initially with an ability to set it back to
True if needed::
except Exception:
with save_and_reraise_exception(reraise=False) as ctxt:
[if statements to determine whether to raise a new exception]
# Not raising a new exception, so reraise
ctxt.reraise = True
"""
def __init__(self, reraise=True):
self.reraise = reraise
def __enter__(self):
self.type_, self.value, self.tb, = sys.exc_info()
return self
def __exit__(self, exc_type, exc_val, exc_tb):
if exc_type is not None:
if self.reraise:
logging.error(_LE('Original exception being dropped: %s'),
traceback.format_exception(self.type_,
self.value,
self.tb))
return False
if self.reraise:
six.reraise(self.type_, self.value, self.tb)
def forever_retry_uncaught_exceptions(infunc):
def inner_func(*args, **kwargs):
last_log_time = 0
last_exc_message = None
exc_count = 0
while True:
try:
return infunc(*args, **kwargs)
except Exception as exc:
this_exc_message = six.u(str(exc))
if this_exc_message == last_exc_message:
exc_count += 1
else:
exc_count = 1
# Do not log any more frequently than once a minute unless
# the exception message changes
cur_time = int(time.time())
if (cur_time - last_log_time > 60 or
this_exc_message != last_exc_message):
logging.exception(
_LE('Unexpected exception occurred %d time(s)... '
'retrying.') % exc_count)
last_log_time = cur_time
last_exc_message = this_exc_message
exc_count = 0
# This should be a very rare event. In case it isn't, do
# a sleep.
time.sleep(1)
return inner_func

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cachemonkey/openstack/common/fileutils.py
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# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import contextlib
import errno
import os
import tempfile
from cachemonkey.openstack.common import excutils
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
_FILE_CACHE = {}
def ensure_tree(path):
"""Create a directory (and any ancestor directories required)
:param path: Directory to create
"""
try:
os.makedirs(path)
except OSError as exc:
if exc.errno == errno.EEXIST:
if not os.path.isdir(path):
raise
else:
raise
def read_cached_file(filename, force_reload=False):
"""Read from a file if it has been modified.
:param force_reload: Whether to reload the file.
:returns: A tuple with a boolean specifying if the data is fresh
or not.
"""
global _FILE_CACHE
if force_reload and filename in _FILE_CACHE:
del _FILE_CACHE[filename]
reloaded = False
mtime = os.path.getmtime(filename)
cache_info = _FILE_CACHE.setdefault(filename, {})
if not cache_info or mtime > cache_info.get('mtime', 0):
LOG.debug("Reloading cached file %s" % filename)
with open(filename) as fap:
cache_info['data'] = fap.read()
cache_info['mtime'] = mtime
reloaded = True
return (reloaded, cache_info['data'])
def delete_if_exists(path, remove=os.unlink):
"""Delete a file, but ignore file not found error.
:param path: File to delete
:param remove: Optional function to remove passed path
"""
try:
remove(path)
except OSError as e:
if e.errno != errno.ENOENT:
raise
@contextlib.contextmanager
def remove_path_on_error(path, remove=delete_if_exists):
"""Protect code that wants to operate on PATH atomically.
Any exception will cause PATH to be removed.
:param path: File to work with
:param remove: Optional function to remove passed path
"""
try:
yield
except Exception:
with excutils.save_and_reraise_exception():
remove(path)
def file_open(*args, **kwargs):
"""Open file
see built-in file() documentation for more details
Note: The reason this is kept in a separate module is to easily
be able to provide a stub module that doesn't alter system
state at all (for unit tests)
"""
return open(*args, **kwargs)
def write_to_tempfile(content, path=None, suffix='', prefix='tmp'):
"""Create temporary file or use existing file.
This util is needed for creating temporary file with
specified content, suffix and prefix. If path is not None,
it will be used for writing content. If the path doesn't
exist it'll be created.
:param content: content for temporary file.
:param path: same as parameter 'dir' for mkstemp
:param suffix: same as parameter 'suffix' for mkstemp
:param prefix: same as parameter 'prefix' for mkstemp
For example: it can be used in database tests for creating
configuration files.
"""
if path:
ensure_tree(path)
(fd, path) = tempfile.mkstemp(suffix=suffix, dir=path, prefix=prefix)
try:
os.write(fd, content)
finally:
os.close(fd)
return path

498
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@ -1,498 +0,0 @@
# Copyright 2012 Red Hat, Inc.
# Copyright 2013 IBM Corp.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
gettext for openstack-common modules.
Usual usage in an openstack.common module:
from cachemonkey.openstack.common.gettextutils import _
"""
import copy
import functools
import gettext
import locale
from logging import handlers
import os
from babel import localedata
import six
_AVAILABLE_LANGUAGES = {}
# FIXME(dhellmann): Remove this when moving to oslo.i18n.
USE_LAZY = False
class TranslatorFactory(object):
"""Create translator functions
"""
def __init__(self, domain, lazy=False, localedir=None):
"""Establish a set of translation functions for the domain.
:param domain: Name of translation domain,
specifying a message catalog.
:type domain: str
:param lazy: Delays translation until a message is emitted.
Defaults to False.
:type lazy: Boolean
:param localedir: Directory with translation catalogs.
:type localedir: str
"""
self.domain = domain
self.lazy = lazy
if localedir is None:
localedir = os.environ.get(domain.upper() + '_LOCALEDIR')
self.localedir = localedir
def _make_translation_func(self, domain=None):
"""Return a new translation function ready for use.
Takes into account whether or not lazy translation is being
done.
The domain can be specified to override the default from the
factory, but the localedir from the factory is always used
because we assume the log-level translation catalogs are
installed in the same directory as the main application
catalog.
"""
if domain is None:
domain = self.domain
if self.lazy:
return functools.partial(Message, domain=domain)
t = gettext.translation(
domain,
localedir=self.localedir,
fallback=True,
)
if six.PY3:
return t.gettext
return t.ugettext
@property
def primary(self):
"The default translation function."
return self._make_translation_func()
def _make_log_translation_func(self, level):
return self._make_translation_func(self.domain + '-log-' + level)
@property
def log_info(self):
"Translate info-level log messages."
return self._make_log_translation_func('info')
@property
def log_warning(self):
"Translate warning-level log messages."
return self._make_log_translation_func('warning')
@property
def log_error(self):
"Translate error-level log messages."
return self._make_log_translation_func('error')
@property
def log_critical(self):
"Translate critical-level log messages."
return self._make_log_translation_func('critical')
# NOTE(dhellmann): When this module moves out of the incubator into
# oslo.i18n, these global variables can be moved to an integration
# module within each application.
# Create the global translation functions.
_translators = TranslatorFactory('cachemonkey')
# The primary translation function using the well-known name "_"
_ = _translators.primary
# Translators for log levels.
#
# The abbreviated names are meant to reflect the usual use of a short
# name like '_'. The "L" is for "log" and the other letter comes from
# the level.
_LI = _translators.log_info
_LW = _translators.log_warning
_LE = _translators.log_error
_LC = _translators.log_critical
# NOTE(dhellmann): End of globals that will move to the application's
# integration module.
def enable_lazy():
"""Convenience function for configuring _() to use lazy gettext
Call this at the start of execution to enable the gettextutils._
function to use lazy gettext functionality. This is useful if
your project is importing _ directly instead of using the
gettextutils.install() way of importing the _ function.
"""
# FIXME(dhellmann): This function will be removed in oslo.i18n,
# because the TranslatorFactory makes it superfluous.
global _, _LI, _LW, _LE, _LC, USE_LAZY
tf = TranslatorFactory('cachemonkey', lazy=True)
_ = tf.primary
_LI = tf.log_info
_LW = tf.log_warning
_LE = tf.log_error
_LC = tf.log_critical
USE_LAZY = True
def install(domain, lazy=False):
"""Install a _() function using the given translation domain.
Given a translation domain, install a _() function using gettext's
install() function.
The main difference from gettext.install() is that we allow
overriding the default localedir (e.g. /usr/share/locale) using
a translation-domain-specific environment variable (e.g.
NOVA_LOCALEDIR).
:param domain: the translation domain
:param lazy: indicates whether or not to install the lazy _() function.
The lazy _() introduces a way to do deferred translation
of messages by installing a _ that builds Message objects,
instead of strings, which can then be lazily translated into
any available locale.
"""
if lazy:
from six import moves
tf = TranslatorFactory(domain, lazy=True)
moves.builtins.__dict__['_'] = tf.primary
else:
localedir = '%s_LOCALEDIR' % domain.upper()
if six.PY3:
gettext.install(domain,
localedir=os.environ.get(localedir))
else:
gettext.install(domain,
localedir=os.environ.get(localedir),
unicode=True)
class Message(six.text_type):
"""A Message object is a unicode object that can be translated.
Translation of Message is done explicitly using the translate() method.
For all non-translation intents and purposes, a Message is simply unicode,
and can be treated as such.
"""
def __new__(cls, msgid, msgtext=None, params=None,
domain='cachemonkey', *args):
"""Create a new Message object.
In order for translation to work gettext requires a message ID, this
msgid will be used as the base unicode text. It is also possible
for the msgid and the base unicode text to be different by passing
the msgtext parameter.
"""
# If the base msgtext is not given, we use the default translation
# of the msgid (which is in English) just in case the system locale is
# not English, so that the base text will be in that locale by default.
if not msgtext:
msgtext = Message._translate_msgid(msgid, domain)
# We want to initialize the parent unicode with the actual object that
# would have been plain unicode if 'Message' was not enabled.
msg = super(Message, cls).__new__(cls, msgtext)
msg.msgid = msgid
msg.domain = domain
msg.params = params
return msg
def translate(self, desired_locale=None):
"""Translate this message to the desired locale.
:param desired_locale: The desired locale to translate the message to,
if no locale is provided the message will be
translated to the system's default locale.
:returns: the translated message in unicode
"""
translated_message = Message._translate_msgid(self.msgid,
self.domain,
desired_locale)
if self.params is None:
# No need for more translation
return translated_message
# This Message object may have been formatted with one or more
# Message objects as substitution arguments, given either as a single
# argument, part of a tuple, or as one or more values in a dictionary.
# When translating this Message we need to translate those Messages too
translated_params = _translate_args(self.params, desired_locale)
translated_message = translated_message % translated_params
return translated_message
@staticmethod
def _translate_msgid(msgid, domain, desired_locale=None):
if not desired_locale:
system_locale = locale.getdefaultlocale()
# If the system locale is not available to the runtime use English
if not system_locale[0]:
desired_locale = 'en_US'
else:
desired_locale = system_locale[0]
locale_dir = os.environ.get(domain.upper() + '_LOCALEDIR')
lang = gettext.translation(domain,
localedir=locale_dir,
languages=[desired_locale],
fallback=True)
if six.PY3:
translator = lang.gettext
else:
translator = lang.ugettext
translated_message = translator(msgid)
return translated_message
def __mod__(self, other):
# When we mod a Message we want the actual operation to be performed
# by the parent class (i.e. unicode()), the only thing we do here is
# save the original msgid and the parameters in case of a translation
params = self._sanitize_mod_params(other)
unicode_mod = super(Message, self).__mod__(params)
modded = Message(self.msgid,
msgtext=unicode_mod,
params=params,
domain=self.domain)
return modded
def _sanitize_mod_params(self, other):
"""Sanitize the object being modded with this Message.
- Add support for modding 'None' so translation supports it
- Trim the modded object, which can be a large dictionary, to only
those keys that would actually be used in a translation
- Snapshot the object being modded, in case the message is
translated, it will be used as it was when the Message was created
"""
if other is None:
params = (other,)
elif isinstance(other, dict):
# Merge the dictionaries
# Copy each item in case one does not support deep copy.
params = {}
if isinstance(self.params, dict):
for key, val in self.params.items():
params[key] = self._copy_param(val)
for key, val in other.items():
params[key] = self._copy_param(val)
else:
params = self._copy_param(other)
return params
def _copy_param(self, param):
try:
return copy.deepcopy(param)
except Exception:
# Fallback to casting to unicode this will handle the
# python code-like objects that can't be deep-copied
return six.text_type(param)
def __add__(self, other):
msg = _('Message objects do not support addition.')
raise TypeError(msg)
def __radd__(self, other):
return self.__add__(other)
if six.PY2:
def __str__(self):
# NOTE(luisg): Logging in python 2.6 tries to str() log records,
# and it expects specifically a UnicodeError in order to proceed.
msg = _('Message objects do not support str() because they may '
'contain non-ascii characters. '
'Please use unicode() or translate() instead.')
raise UnicodeError(msg)
def get_available_languages(domain):
"""Lists the available languages for the given translation domain.
:param domain: the domain to get languages for
"""
if domain in _AVAILABLE_LANGUAGES:
return copy.copy(_AVAILABLE_LANGUAGES[domain])
localedir = '%s_LOCALEDIR' % domain.upper()
find = lambda x: gettext.find(domain,
localedir=os.environ.get(localedir),
languages=[x])
# NOTE(mrodden): en_US should always be available (and first in case
# order matters) since our in-line message strings are en_US
language_list = ['en_US']
# NOTE(luisg): Babel <1.0 used a function called list(), which was
# renamed to locale_identifiers() in >=1.0, the requirements master list
# requires >=0.9.6, uncapped, so defensively work with both. We can remove
# this check when the master list updates to >=1.0, and update all projects
list_identifiers = (getattr(localedata, 'list', None) or
getattr(localedata, 'locale_identifiers'))
locale_identifiers = list_identifiers()
for i in locale_identifiers:
if find(i) is not None:
language_list.append(i)
# NOTE(luisg): Babel>=1.0,<1.3 has a bug where some OpenStack supported
# locales (e.g. 'zh_CN', and 'zh_TW') aren't supported even though they
# are perfectly legitimate locales:
# https://github.com/mitsuhiko/babel/issues/37
# In Babel 1.3 they fixed the bug and they support these locales, but
# they are still not explicitly "listed" by locale_identifiers().
# That is why we add the locales here explicitly if necessary so that
# they are listed as supported.
aliases = {'zh': 'zh_CN',
'zh_Hant_HK': 'zh_HK',
'zh_Hant': 'zh_TW',
'fil': 'tl_PH'}
for (locale, alias) in six.iteritems(aliases):
if locale in language_list and alias not in language_list:
language_list.append(alias)
_AVAILABLE_LANGUAGES[domain] = language_list
return copy.copy(language_list)
def translate(obj, desired_locale=None):
"""Gets the translated unicode representation of the given object.
If the object is not translatable it is returned as-is.
If the locale is None the object is translated to the system locale.
:param obj: the object to translate
:param desired_locale: the locale to translate the message to, if None the
default system locale will be used
:returns: the translated object in unicode, or the original object if
it could not be translated
"""
message = obj
if not isinstance(message, Message):
# If the object to translate is not already translatable,
# let's first get its unicode representation
message = six.text_type(obj)
if isinstance(message, Message):
# Even after unicoding() we still need to check if we are
# running with translatable unicode before translating
return message.translate(desired_locale)
return obj
def _translate_args(args, desired_locale=None):
"""Translates all the translatable elements of the given arguments object.
This method is used for translating the translatable values in method
arguments which include values of tuples or dictionaries.
If the object is not a tuple or a dictionary the object itself is
translated if it is translatable.
If the locale is None the object is translated to the system locale.
:param args: the args to translate
:param desired_locale: the locale to translate the args to, if None the
default system locale will be used
:returns: a new args object with the translated contents of the original
"""
if isinstance(args, tuple):
return tuple(translate(v, desired_locale) for v in args)
if isinstance(args, dict):
translated_dict = {}
for (k, v) in six.iteritems(args):
translated_v = translate(v, desired_locale)
translated_dict[k] = translated_v
return translated_dict
return translate(args, desired_locale)
class TranslationHandler(handlers.MemoryHandler):
"""Handler that translates records before logging them.
The TranslationHandler takes a locale and a target logging.Handler object
to forward LogRecord objects to after translating them. This handler
depends on Message objects being logged, instead of regular strings.
The handler can be configured declaratively in the logging.conf as follows:
[handlers]
keys = translatedlog, translator
[handler_translatedlog]
class = handlers.WatchedFileHandler
args = ('/var/log/api-localized.log',)
formatter = context
[handler_translator]
class = openstack.common.log.TranslationHandler
target = translatedlog
args = ('zh_CN',)
If the specified locale is not available in the system, the handler will
log in the default locale.
"""
def __init__(self, locale=None, target=None):
"""Initialize a TranslationHandler
:param locale: locale to use for translating messages
:param target: logging.Handler object to forward
LogRecord objects to after translation
"""
# NOTE(luisg): In order to allow this handler to be a wrapper for
# other handlers, such as a FileHandler, and still be able to
# configure it using logging.conf, this handler has to extend
# MemoryHandler because only the MemoryHandlers' logging.conf
# parsing is implemented such that it accepts a target handler.
handlers.MemoryHandler.__init__(self, capacity=0, target=target)
self.locale = locale
def setFormatter(self, fmt):
self.target.setFormatter(fmt)
def emit(self, record):
# We save the message from the original record to restore it
# after translation, so other handlers are not affected by this
original_msg = record.msg
original_args = record.args
try:
self._translate_and_log_record(record)
finally:
record.msg = original_msg
record.args = original_args
def _translate_and_log_record(self, record):
record.msg = translate(record.msg, self.locale)
# In addition to translating the message, we also need to translate
# arguments that were passed to the log method that were not part
# of the main message e.g., log.info(_('Some message %s'), this_one))
record.args = _translate_args(record.args, self.locale)
self.target.emit(record)

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@ -1,73 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Import related utilities and helper functions.
"""
import sys
import traceback
def import_class(import_str):
"""Returns a class from a string including module and class."""
mod_str, _sep, class_str = import_str.rpartition('.')
__import__(mod_str)
try:
return getattr(sys.modules[mod_str], class_str)
except AttributeError:
raise ImportError('Class %s cannot be found (%s)' %
(class_str,
traceback.format_exception(*sys.exc_info())))
def import_object(import_str, *args, **kwargs):
"""Import a class and return an instance of it."""
return import_class(import_str)(*args, **kwargs)
def import_object_ns(name_space, import_str, *args, **kwargs):
"""Tries to import object from default namespace.
Imports a class and return an instance of it, first by trying
to find the class in a default namespace, then failing back to
a full path if not found in the default namespace.
"""
import_value = "%s.%s" % (name_space, import_str)
try:
return import_class(import_value)(*args, **kwargs)
except ImportError:
return import_class(import_str)(*args, **kwargs)
def import_module(import_str):
"""Import a module."""
__import__(import_str)
return sys.modules[import_str]
def import_versioned_module(version, submodule=None):
module = 'cachemonkey.v%s' % version
if submodule:
module = '.'.join((module, submodule))
return import_module(module)
def try_import(import_str, default=None):
"""Try to import a module and if it fails return default."""
try:
return import_module(import_str)
except ImportError:
return default

186
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@ -1,186 +0,0 @@
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Justin Santa Barbara
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
'''
JSON related utilities.
This module provides a few things:
1) A handy function for getting an object down to something that can be
JSON serialized. See to_primitive().
2) Wrappers around loads() and dumps(). The dumps() wrapper will
automatically use to_primitive() for you if needed.
3) This sets up anyjson to use the loads() and dumps() wrappers if anyjson
is available.
'''
import codecs
import datetime
import functools
import inspect
import itertools
import sys
if sys.version_info < (2, 7):
# On Python <= 2.6, json module is not C boosted, so try to use
# simplejson module if available
try:
import simplejson as json
except ImportError:
import json
else:
import json
import six
import six.moves.xmlrpc_client as xmlrpclib
from cachemonkey.openstack.common import gettextutils
from cachemonkey.openstack.common import importutils
from cachemonkey.openstack.common import strutils
from cachemonkey.openstack.common import timeutils
netaddr = importutils.try_import("netaddr")
_nasty_type_tests = [inspect.ismodule, inspect.isclass, inspect.ismethod,
inspect.isfunction, inspect.isgeneratorfunction,
inspect.isgenerator, inspect.istraceback, inspect.isframe,
inspect.iscode, inspect.isbuiltin, inspect.isroutine,
inspect.isabstract]
_simple_types = (six.string_types + six.integer_types
+ (type(None), bool, float))
def to_primitive(value, convert_instances=False, convert_datetime=True,
level=0, max_depth=3):
"""Convert a complex object into primitives.
Handy for JSON serialization. We can optionally handle instances,
but since this is a recursive function, we could have cyclical
data structures.
To handle cyclical data structures we could track the actual objects
visited in a set, but not all objects are hashable. Instead we just
track the depth of the object inspections and don't go too deep.
Therefore, convert_instances=True is lossy ... be aware.
"""
# handle obvious types first - order of basic types determined by running
# full tests on nova project, resulting in the following counts:
# 572754 <type 'NoneType'>
# 460353 <type 'int'>
# 379632 <type 'unicode'>
# 274610 <type 'str'>
# 199918 <type 'dict'>
# 114200 <type 'datetime.datetime'>
# 51817 <type 'bool'>
# 26164 <type 'list'>
# 6491 <type 'float'>
# 283 <type 'tuple'>
# 19 <type 'long'>
if isinstance(value, _simple_types):
return value
if isinstance(value, datetime.datetime):
if convert_datetime:
return timeutils.strtime(value)
else:
return value
# value of itertools.count doesn't get caught by nasty_type_tests
# and results in infinite loop when list(value) is called.
if type(value) == itertools.count:
return six.text_type(value)
# FIXME(vish): Workaround for LP bug 852095. Without this workaround,
# tests that raise an exception in a mocked method that
# has a @wrap_exception with a notifier will fail. If
# we up the dependency to 0.5.4 (when it is released) we
# can remove this workaround.
if getattr(value, '__module__', None) == 'mox':
return 'mock'
if level > max_depth:
return '?'
# The try block may not be necessary after the class check above,
# but just in case ...
try:
recursive = functools.partial(to_primitive,
convert_instances=convert_instances,
convert_datetime=convert_datetime,
level=level,
max_depth=max_depth)
if isinstance(value, dict):
return dict((k, recursive(v)) for k, v in six.iteritems(value))
elif isinstance(value, (list, tuple)):
return [recursive(lv) for lv in value]
# It's not clear why xmlrpclib created their own DateTime type, but
# for our purposes, make it a datetime type which is explicitly
# handled
if isinstance(value, xmlrpclib.DateTime):
value = datetime.datetime(*tuple(value.timetuple())[:6])
if convert_datetime and isinstance(value, datetime.datetime):
return timeutils.strtime(value)
elif isinstance(value, gettextutils.Message):
return value.data
elif hasattr(value, 'iteritems'):
return recursive(dict(value.iteritems()), level=level + 1)
elif hasattr(value, '__iter__'):
return recursive(list(value))
elif convert_instances and hasattr(value, '__dict__'):
# Likely an instance of something. Watch for cycles.
# Ignore class member vars.
return recursive(value.__dict__, level=level + 1)
elif netaddr and isinstance(value, netaddr.IPAddress):
return six.text_type(value)
else:
if any(test(value) for test in _nasty_type_tests):
return six.text_type(value)
return value
except TypeError:
# Class objects are tricky since they may define something like
# __iter__ defined but it isn't callable as list().
return six.text_type(value)
def dumps(value, default=to_primitive, **kwargs):
return json.dumps(value, default=default, **kwargs)
def loads(s, encoding='utf-8'):
return json.loads(strutils.safe_decode(s, encoding))
def load(fp, encoding='utf-8'):
return json.load(codecs.getreader(encoding)(fp))
try:
import anyjson
except ImportError:
pass
else:
anyjson._modules.append((__name__, 'dumps', TypeError,
'loads', ValueError, 'load'))
anyjson.force_implementation(__name__)

45
cachemonkey/openstack/common/local.py
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@ -1,45 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Local storage of variables using weak references"""
import threading
import weakref
class WeakLocal(threading.local):
def __getattribute__(self, attr):
rval = super(WeakLocal, self).__getattribute__(attr)
if rval:
# NOTE(mikal): this bit is confusing. What is stored is a weak
# reference, not the value itself. We therefore need to lookup
# the weak reference and return the inner value here.
rval = rval()
return rval
def __setattr__(self, attr, value):
value = weakref.ref(value)
return super(WeakLocal, self).__setattr__(attr, value)
# NOTE(mikal): the name "store" should be deprecated in the future
store = WeakLocal()
# A "weak" store uses weak references and allows an object to fall out of scope
# when it falls out of scope in the code that uses the thread local storage. A
# "strong" store will hold a reference to the object so that it never falls out
# of scope.
weak_store = WeakLocal()
strong_store = threading.local()

378
cachemonkey/openstack/common/lockutils.py
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@ -1,378 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import contextlib
import errno
import fcntl
import functools
import os
import shutil
import subprocess
import sys
import tempfile
import threading
import time
import weakref
from oslo.config import cfg
from cachemonkey.openstack.common import fileutils
from cachemonkey.openstack.common.gettextutils import _, _LE, _LI
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
util_opts = [
cfg.BoolOpt('disable_process_locking', default=False,
help='Enables or disables inter-process locks.'),
cfg.StrOpt('lock_path',
default=os.environ.get("CACHEMONKEY_LOCK_PATH"),
help='Directory to use for lock files.')
]
CONF = cfg.CONF
CONF.register_opts(util_opts)
def set_defaults(lock_path):
cfg.set_defaults(util_opts, lock_path=lock_path)
class _FileLock(object):
"""Lock implementation which allows multiple locks, working around
issues like bugs.debian.org/cgi-bin/bugreport.cgi?bug=632857 and does
not require any cleanup. Since the lock is always held on a file
descriptor rather than outside of the process, the lock gets dropped
automatically if the process crashes, even if __exit__ is not executed.
There are no guarantees regarding usage by multiple green threads in a
single process here. This lock works only between processes. Exclusive
access between local threads should be achieved using the semaphores
in the @synchronized decorator.
Note these locks are released when the descriptor is closed, so it's not
safe to close the file descriptor while another green thread holds the
lock. Just opening and closing the lock file can break synchronisation,
so lock files must be accessed only using this abstraction.
"""
def __init__(self, name):
self.lockfile = None
self.fname = name
def acquire(self):
basedir = os.path.dirname(self.fname)
if not os.path.exists(basedir):
fileutils.ensure_tree(basedir)
LOG.info(_LI('Created lock path: %s'), basedir)
self.lockfile = open(self.fname, 'w')
while True:
try:
# Using non-blocking locks since green threads are not
# patched to deal with blocking locking calls.
# Also upon reading the MSDN docs for locking(), it seems
# to have a laughable 10 attempts "blocking" mechanism.
self.trylock()
LOG.debug('Got file lock "%s"', self.fname)
return True
except IOError as e:
if e.errno in (errno.EACCES, errno.EAGAIN):
# external locks synchronise things like iptables
# updates - give it some time to prevent busy spinning
time.sleep(0.01)
else:
raise threading.ThreadError(_("Unable to acquire lock on"
" `%(filename)s` due to"
" %(exception)s") %
{
'filename': self.fname,
'exception': e,
})
def __enter__(self):
self.acquire()
return self
def release(self):
try:
self.unlock()
self.lockfile.close()
LOG.debug('Released file lock "%s"', self.fname)
except IOError:
LOG.exception(_LE("Could not release the acquired lock `%s`"),
self.fname)
def __exit__(self, exc_type, exc_val, exc_tb):
self.release()
def exists(self):
return os.path.exists(self.fname)
def trylock(self):
raise NotImplementedError()
def unlock(self):
raise NotImplementedError()
class _WindowsLock(_FileLock):
def trylock(self):
msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_NBLCK, 1)
def unlock(self):
msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_UNLCK, 1)
class _FcntlLock(_FileLock):
def trylock(self):
fcntl.lockf(self.lockfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
def unlock(self):
fcntl.lockf(self.lockfile, fcntl.LOCK_UN)
class _PosixLock(object):
def __init__(self, name):
# Hash the name because it's not valid to have POSIX semaphore
# names with things like / in them. Then use base64 to encode
# the digest() instead taking the hexdigest() because the
# result is shorter and most systems can't have shm sempahore
# names longer than 31 characters.
h = hashlib.sha1()
h.update(name.encode('ascii'))
self.name = str((b'/' + base64.urlsafe_b64encode(
h.digest())).decode('ascii'))
def acquire(self, timeout=None):
self.semaphore = posix_ipc.Semaphore(self.name,
flags=posix_ipc.O_CREAT,
initial_value=1)
self.semaphore.acquire(timeout)
return self
def __enter__(self):
self.acquire()
return self
def release(self):
self.semaphore.release()
self.semaphore.close()
def __exit__(self, exc_type, exc_val, exc_tb):
self.release()
def exists(self):
try:
semaphore = posix_ipc.Semaphore(self.name)
except posix_ipc.ExistentialError:
return False
else:
semaphore.close()
return True
if os.name == 'nt':
import msvcrt
InterProcessLock = _WindowsLock
FileLock = _WindowsLock
else:
import base64
import hashlib
import posix_ipc
InterProcessLock = _PosixLock
FileLock = _FcntlLock
_semaphores = weakref.WeakValueDictionary()
_semaphores_lock = threading.Lock()
def _get_lock_path(name, lock_file_prefix, lock_path=None):
# NOTE(mikal): the lock name cannot contain directory
# separators
name = name.replace(os.sep, '_')
if lock_file_prefix:
sep = '' if lock_file_prefix.endswith('-') else '-'
name = '%s%s%s' % (lock_file_prefix, sep, name)
local_lock_path = lock_path or CONF.lock_path
if not local_lock_path:
# NOTE(bnemec): Create a fake lock path for posix locks so we don't
# unnecessarily raise the RequiredOptError below.
if InterProcessLock is not _PosixLock:
raise cfg.RequiredOptError('lock_path')
local_lock_path = 'posixlock:/'
return os.path.join(local_lock_path, name)
def external_lock(name, lock_file_prefix=None, lock_path=None):
LOG.debug('Attempting to grab external lock "%(lock)s"',
{'lock': name})
lock_file_path = _get_lock_path(name, lock_file_prefix, lock_path)
# NOTE(bnemec): If an explicit lock_path was passed to us then it
# means the caller is relying on file-based locking behavior, so
# we can't use posix locks for those calls.
if lock_path:
return FileLock(lock_file_path)
return InterProcessLock(lock_file_path)
def remove_external_lock_file(name, lock_file_prefix=None):
"""Remove a external lock file when it's not used anymore
This will be helpful when we have a lot of lock files
"""
with internal_lock(name):
lock_file_path = _get_lock_path(name, lock_file_prefix)
try:
os.remove(lock_file_path)
except OSError:
LOG.info(_LI('Failed to remove file %(file)s'),
{'file': lock_file_path})
def internal_lock(name):
with _semaphores_lock:
try:
sem = _semaphores[name]
except KeyError:
sem = threading.Semaphore()
_semaphores[name] = sem
LOG.debug('Got semaphore "%(lock)s"', {'lock': name})
return sem
@contextlib.contextmanager
def lock(name, lock_file_prefix=None, external=False, lock_path=None):
"""Context based lock
This function yields a `threading.Semaphore` instance (if we don't use
eventlet.monkey_patch(), else `semaphore.Semaphore`) unless external is
True, in which case, it'll yield an InterProcessLock instance.
:param lock_file_prefix: The lock_file_prefix argument is used to provide
lock files on disk with a meaningful prefix.
:param external: The external keyword argument denotes whether this lock
should work across multiple processes. This means that if two different
workers both run a method decorated with @synchronized('mylock',
external=True), only one of them will execute at a time.
"""
int_lock = internal_lock(name)
with int_lock:
if external and not CONF.disable_process_locking:
ext_lock = external_lock(name, lock_file_prefix, lock_path)
with ext_lock:
yield ext_lock
else:
yield int_lock
LOG.debug('Released semaphore "%(lock)s"', {'lock': name})
def synchronized(name, lock_file_prefix=None, external=False, lock_path=None):
"""Synchronization decorator.
Decorating a method like so::
@synchronized('mylock')
def foo(self, *args):
...
ensures that only one thread will execute the foo method at a time.
Different methods can share the same lock::
@synchronized('mylock')
def foo(self, *args):
...
@synchronized('mylock')
def bar(self, *args):
...
This way only one of either foo or bar can be executing at a time.
"""
def wrap(f):
@functools.wraps(f)
def inner(*args, **kwargs):
try:
with lock(name, lock_file_prefix, external, lock_path):
LOG.debug('Got semaphore / lock "%(function)s"',
{'function': f.__name__})
return f(*args, **kwargs)
finally:
LOG.debug('Semaphore / lock released "%(function)s"',
{'function': f.__name__})
return inner
return wrap
def synchronized_with_prefix(lock_file_prefix):
"""Partial object generator for the synchronization decorator.
Redefine @synchronized in each project like so::
(in nova/utils.py)
from nova.openstack.common import lockutils
synchronized = lockutils.synchronized_with_prefix('nova-')
(in nova/foo.py)
from nova import utils
@utils.synchronized('mylock')
def bar(self, *args):
...
The lock_file_prefix argument is used to provide lock files on disk with a
meaningful prefix.
"""
return functools.partial(synchronized, lock_file_prefix=lock_file_prefix)
def main(argv):
"""Create a dir for locks and pass it to command from arguments
If you run this:
python -m openstack.common.lockutils python setup.py testr <etc>
a temporary directory will be created for all your locks and passed to all
your tests in an environment variable. The temporary dir will be deleted
afterwards and the return value will be preserved.
"""
lock_dir = tempfile.mkdtemp()
os.environ["CACHEMONKEY_LOCK_PATH"] = lock_dir
try:
ret_val = subprocess.call(argv[1:])
finally:
shutil.rmtree(lock_dir, ignore_errors=True)
return ret_val
if __name__ == '__main__':
sys.exit(main(sys.argv))

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cachemonkey/openstack/common/log.py
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@ -1,723 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""OpenStack logging handler.
This module adds to logging functionality by adding the option to specify
a context object when calling the various log methods. If the context object
is not specified, default formatting is used. Additionally, an instance uuid
may be passed as part of the log message, which is intended to make it easier
for admins to find messages related to a specific instance.
It also allows setting of formatting information through conf.
"""
import inspect
import itertools
import logging
import logging.config
import logging.handlers
import os
import re
import sys
import traceback
from oslo.config import cfg
import six
from six import moves
from cachemonkey.openstack.common.gettextutils import _
from cachemonkey.openstack.common import importutils
from cachemonkey.openstack.common import jsonutils
from cachemonkey.openstack.common import local
_DEFAULT_LOG_DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
_SANITIZE_KEYS = ['adminPass', 'admin_pass', 'password', 'admin_password']
# NOTE(ldbragst): Let's build a list of regex objects using the list of
# _SANITIZE_KEYS we already have. This way, we only have to add the new key
# to the list of _SANITIZE_KEYS and we can generate regular expressions
# for XML and JSON automatically.
_SANITIZE_PATTERNS = []
_FORMAT_PATTERNS = [r'(%(key)s\s*[=]\s*[\"\']).*?([\"\'])',
r'(<%(key)s>).*?(</%(key)s>)',
r'([\"\']%(key)s[\"\']\s*:\s*[\"\']).*?([\"\'])',
r'([\'"].*?%(key)s[\'"]\s*:\s*u?[\'"]).*?([\'"])',
r'([\'"].*?%(key)s[\'"]\s*,\s*\'--?[A-z]+\'\s*,\s*u?[\'"])'
'.*?([\'"])',
r'(%(key)s\s*--?[A-z]+\s*).*?([\s])']
for key in _SANITIZE_KEYS:
for pattern in _FORMAT_PATTERNS:
reg_ex = re.compile(pattern % {'key': key}, re.DOTALL)
_SANITIZE_PATTERNS.append(reg_ex)
common_cli_opts = [
cfg.BoolOpt('debug',
short='d',
default=False,
help='Print debugging output (set logging level to '
'DEBUG instead of default WARNING level).'),
cfg.BoolOpt('verbose',
short='v',
default=False,
help='Print more verbose output (set logging level to '
'INFO instead of default WARNING level).'),
]
logging_cli_opts = [
cfg.StrOpt('log-config-append',
metavar='PATH',
deprecated_name='log-config',
help='The name of a logging configuration file. This file '
'is appended to any existing logging configuration '
'files. For details about logging configuration files, '
'see the Python logging module documentation.'),
cfg.StrOpt('log-format',
metavar='FORMAT',
help='DEPRECATED. '
'A logging.Formatter log message format string which may '
'use any of the available logging.LogRecord attributes. '
'This option is deprecated. Please use '
'logging_context_format_string and '
'logging_default_format_string instead.'),
cfg.StrOpt('log-date-format',
default=_DEFAULT_LOG_DATE_FORMAT,
metavar='DATE_FORMAT',
help='Format string for %%(asctime)s in log records. '
'Default: %(default)s .'),
cfg.StrOpt('log-file',
metavar='PATH',
deprecated_name='logfile',
help='(Optional) Name of log file to output to. '
'If no default is set, logging will go to stdout.'),
cfg.StrOpt('log-dir',
deprecated_name='logdir',
help='(Optional) The base directory used for relative '
'--log-file paths.'),
cfg.BoolOpt('use-syslog',
default=False,
help='Use syslog for logging. '
'Existing syslog format is DEPRECATED during I, '
'and will chang in J to honor RFC5424.'),
cfg.BoolOpt('use-syslog-rfc-format',
# TODO(bogdando) remove or use True after existing
# syslog format deprecation in J
default=False,
help='(Optional) Enables or disables syslog rfc5424 format '
'for logging. If enabled, prefixes the MSG part of the '
'syslog message with APP-NAME (RFC5424). The '
'format without the APP-NAME is deprecated in I, '
'and will be removed in J.'),
cfg.StrOpt('syslog-log-facility',
default='LOG_USER',
help='Syslog facility to receive log lines.')
]
generic_log_opts = [
cfg.BoolOpt('use_stderr',
default=True,
help='Log output to standard error.')
]
log_opts = [
cfg.StrOpt('logging_context_format_string',
default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
'%(name)s [%(request_id)s %(user_identity)s] '
'%(instance)s%(message)s',
help='Format string to use for log messages with context.'),
cfg.StrOpt('logging_default_format_string',
default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
'%(name)s [-] %(instance)s%(message)s',
help='Format string to use for log messages without context.'),
cfg.StrOpt('logging_debug_format_suffix',
default='%(funcName)s %(pathname)s:%(lineno)d',
help='Data to append to log format when level is DEBUG.'),
cfg.StrOpt('logging_exception_prefix',
default='%(asctime)s.%(msecs)03d %(process)d TRACE %(name)s '
'%(instance)s',
help='Prefix each line of exception output with this format.'),
cfg.ListOpt('default_log_levels',
default=[
'amqp=WARN',
'amqplib=WARN',
'boto=WARN',
'qpid=WARN',
'sqlalchemy=WARN',
'suds=INFO',
'oslo.messaging=INFO',
'iso8601=WARN',
'requests.packages.urllib3.connectionpool=WARN'
],
help='List of logger=LEVEL pairs.'),
cfg.BoolOpt('publish_errors',
default=False,
help='Enables or disables publication of error events.'),
cfg.BoolOpt('fatal_deprecations',
default=False,
help='Enables or disables fatal status of deprecations.'),
# NOTE(mikal): there are two options here because sometimes we are handed
# a full instance (and could include more information), and other times we
# are just handed a UUID for the instance.
cfg.StrOpt('instance_format',
default='[instance: %(uuid)s] ',
help='The format for an instance that is passed with the log '
'message. '),
cfg.StrOpt('instance_uuid_format',
default='[instance: %(uuid)s] ',
help='The format for an instance UUID that is passed with the '
'log message. '),
]
CONF = cfg.CONF
CONF.register_cli_opts(common_cli_opts)
CONF.register_cli_opts(logging_cli_opts)
CONF.register_opts(generic_log_opts)
CONF.register_opts(log_opts)
# our new audit level
# NOTE(jkoelker) Since we synthesized an audit level, make the logging
# module aware of it so it acts like other levels.
logging.AUDIT = logging.INFO + 1
logging.addLevelName(logging.AUDIT, 'AUDIT')
try:
NullHandler = logging.NullHandler
except AttributeError: # NOTE(jkoelker) NullHandler added in Python 2.7
class NullHandler(logging.Handler):
def handle(self, record):
pass
def emit(self, record):
pass
def createLock(self):
self.lock = None
def _dictify_context(context):
if context is None:
return None
if not isinstance(context, dict) and getattr(context, 'to_dict', None):
context = context.to_dict()
return context
def _get_binary_name():
return os.path.basename(inspect.stack()[-1][1])
def _get_log_file_path(binary=None):
logfile = CONF.log_file
logdir = CONF.log_dir
if logfile and not logdir:
return logfile
if logfile and logdir:
return os.path.join(logdir, logfile)
if logdir:
binary = binary or _get_binary_name()
return '%s.log' % (os.path.join(logdir, binary),)
return None
def mask_password(message, secret="***"):
"""Replace password with 'secret' in message.
:param message: The string which includes security information.
:param secret: value with which to replace passwords.
:returns: The unicode value of message with the password fields masked.
For example:
>>> mask_password("'adminPass' : 'aaaaa'")
"'adminPass' : '***'"
>>> mask_password("'admin_pass' : 'aaaaa'")
"'admin_pass' : '***'"
>>> mask_password('"password" : "aaaaa"')
'"password" : "***"'
>>> mask_password("'original_password' : 'aaaaa'")
"'original_password' : '***'"
>>> mask_password("u'original_password' : u'aaaaa'")
"u'original_password' : u'***'"
"""
message = six.text_type(message)
# NOTE(ldbragst): Check to see if anything in message contains any key
# specified in _SANITIZE_KEYS, if not then just return the message since
# we don't have to mask any passwords.
if not any(key in message for key in _SANITIZE_KEYS):
return message
secret = r'\g<1>' + secret + r'\g<2>'
for pattern in _SANITIZE_PATTERNS:
message = re.sub(pattern, secret, message)
return message
class BaseLoggerAdapter(logging.LoggerAdapter):
def audit(self, msg, *args, **kwargs):
self.log(logging.AUDIT, msg, *args, **kwargs)
class LazyAdapter(BaseLoggerAdapter):
def __init__(self, name='unknown', version='unknown'):
self._logger = None
self.extra = {}
self.name = name
self.version = version
@property
def logger(self):
if not self._logger:
self._logger = getLogger(self.name, self.version)
return self._logger
class ContextAdapter(BaseLoggerAdapter):
warn = logging.LoggerAdapter.warning
def __init__(self, logger, project_name, version_string):
self.logger = logger
self.project = project_name
self.version = version_string
self._deprecated_messages_sent = dict()
@property
def handlers(self):
return self.logger.handlers
def deprecated(self, msg, *args, **kwargs):
"""Call this method when a deprecated feature is used.
If the system is configured for fatal deprecations then the message
is logged at the 'critical' level and :class:`DeprecatedConfig` will
be raised.
Otherwise, the message will be logged (once) at the 'warn' level.
:raises: :class:`DeprecatedConfig` if the system is configured for
fatal deprecations.
"""
stdmsg = _("Deprecated: %s") % msg
if CONF.fatal_deprecations:
self.critical(stdmsg, *args, **kwargs)
raise DeprecatedConfig(msg=stdmsg)
# Using a list because a tuple with dict can't be stored in a set.
sent_args = self._deprecated_messages_sent.setdefault(msg, list())
if args in sent_args:
# Already logged this message, so don't log it again.
return
sent_args.append(args)
self.warn(stdmsg, *args, **kwargs)
def process(self, msg, kwargs):
# NOTE(mrodden): catch any Message/other object and
# coerce to unicode before they can get
# to the python logging and possibly
# cause string encoding trouble
if not isinstance(msg, six.string_types):
msg = six.text_type(msg)
if 'extra' not in kwargs:
kwargs['extra'] = {}
extra = kwargs['extra']
context = kwargs.pop('context', None)
if not context:
context = getattr(local.store, 'context', None)
if context:
extra.update(_dictify_context(context))
instance = kwargs.pop('instance', None)
instance_uuid = (extra.get('instance_uuid') or
kwargs.pop('instance_uuid', None))
instance_extra = ''
if instance:
instance_extra = CONF.instance_format % instance
elif instance_uuid:
instance_extra = (CONF.instance_uuid_format
% {'uuid': instance_uuid})
extra['instance'] = instance_extra
extra.setdefault('user_identity', kwargs.pop('user_identity', None))
extra['project'] = self.project
extra['version'] = self.version
extra['extra'] = extra.copy()
return msg, kwargs
class JSONFormatter(logging.Formatter):
def __init__(self, fmt=None, datefmt=None):
# NOTE(jkoelker) we ignore the fmt argument, but its still there
# since logging.config.fileConfig passes it.
self.datefmt = datefmt
def formatException(self, ei, strip_newlines=True):
lines = traceback.format_exception(*ei)
if strip_newlines:
lines = [moves.filter(
lambda x: x,
line.rstrip().splitlines()) for line in lines]
lines = list(itertools.chain(*lines))
return lines
def format(self, record):
message = {'message': record.getMessage(),
'asctime': self.formatTime(record, self.datefmt),
'name': record.name,
'msg': record.msg,
'args': record.args,
'levelname': record.levelname,
'levelno': record.levelno,
'pathname': record.pathname,
'filename': record.filename,
'module': record.module,
'lineno': record.lineno,
'funcname': record.funcName,
'created': record.created,
'msecs': record.msecs,
'relative_created': record.relativeCreated,
'thread': record.thread,
'thread_name': record.threadName,
'process_name': record.processName,
'process': record.process,
'traceback': None}
if hasattr(record, 'extra'):
message['extra'] = record.extra
if record.exc_info:
message['traceback'] = self.formatException(record.exc_info)
return jsonutils.dumps(message)
def _create_logging_excepthook(product_name):
def logging_excepthook(exc_type, value, tb):
extra = {'exc_info': (exc_type, value, tb)}
getLogger(product_name).critical(
"".join(traceback.format_exception_only(exc_type, value)),
**extra)
return logging_excepthook
class LogConfigError(Exception):
message = _('Error loading logging config %(log_config)s: %(err_msg)s')
def __init__(self, log_config, err_msg):
self.log_config = log_config
self.err_msg = err_msg
def __str__(self):
return self.message % dict(log_config=self.log_config,
err_msg=self.err_msg)
def _load_log_config(log_config_append):
try:
logging.config.fileConfig(log_config_append,
disable_existing_loggers=False)
except moves.configparser.Error as exc:
raise LogConfigError(log_config_append, six.text_type(exc))
def setup(product_name, version='unknown'):
"""Setup logging."""
if CONF.log_config_append:
_load_log_config(CONF.log_config_append)
else:
_setup_logging_from_conf(product_name, version)
sys.excepthook = _create_logging_excepthook(product_name)
def set_defaults(logging_context_format_string):
cfg.set_defaults(log_opts,
logging_context_format_string=
logging_context_format_string)
def _find_facility_from_conf():
facility_names = logging.handlers.SysLogHandler.facility_names
facility = getattr(logging.handlers.SysLogHandler,
CONF.syslog_log_facility,
None)
if facility is None and CONF.syslog_log_facility in facility_names:
facility = facility_names.get(CONF.syslog_log_facility)
if facility is None:
valid_facilities = facility_names.keys()
consts = ['LOG_AUTH', 'LOG_AUTHPRIV', 'LOG_CRON', 'LOG_DAEMON',
'LOG_FTP', 'LOG_KERN', 'LOG_LPR', 'LOG_MAIL', 'LOG_NEWS',
'LOG_AUTH', 'LOG_SYSLOG', 'LOG_USER', 'LOG_UUCP',
'LOG_LOCAL0', 'LOG_LOCAL1', 'LOG_LOCAL2', 'LOG_LOCAL3',
'LOG_LOCAL4', 'LOG_LOCAL5', 'LOG_LOCAL6', 'LOG_LOCAL7']
valid_facilities.extend(consts)
raise TypeError(_('syslog facility must be one of: %s') %
', '.join("'%s'" % fac
for fac in valid_facilities))
return facility
class RFCSysLogHandler(logging.handlers.SysLogHandler):
def __init__(self, *args, **kwargs):
self.binary_name = _get_binary_name()
# Do not use super() unless type(logging.handlers.SysLogHandler)
# is 'type' (Python 2.7).
# Use old style calls, if the type is 'classobj' (Python 2.6)
logging.handlers.SysLogHandler.__init__(self, *args, **kwargs)
def format(self, record):
# Do not use super() unless type(logging.handlers.SysLogHandler)
# is 'type' (Python 2.7).
# Use old style calls, if the type is 'classobj' (Python 2.6)
msg = logging.handlers.SysLogHandler.format(self, record)
msg = self.binary_name + ' ' + msg
return msg
def _setup_logging_from_conf(project, version):
log_root = getLogger(None).logger
for handler in log_root.handlers:
log_root.removeHandler(handler)
if CONF.use_syslog:
facility = _find_facility_from_conf()
# TODO(bogdando) use the format provided by RFCSysLogHandler
# after existing syslog format deprecation in J
if CONF.use_syslog_rfc_format:
syslog = RFCSysLogHandler(address='/dev/log',
facility=facility)
else:
syslog = logging.handlers.SysLogHandler(address='/dev/log',
facility=facility)
log_root.addHandler(syslog)
logpath = _get_log_file_path()
if logpath:
filelog = logging.handlers.WatchedFileHandler(logpath)
log_root.addHandler(filelog)
if CONF.use_stderr:
streamlog = ColorHandler()
log_root.addHandler(streamlog)
elif not logpath:
# pass sys.stdout as a positional argument
# python2.6 calls the argument strm, in 2.7 it's stream
streamlog = logging.StreamHandler(sys.stdout)
log_root.addHandler(streamlog)
if CONF.publish_errors:
handler = importutils.import_object(
"cachemonkey.openstack.common.log_handler.PublishErrorsHandler",
logging.ERROR)
log_root.addHandler(handler)
datefmt = CONF.log_date_format
for handler in log_root.handlers:
# NOTE(alaski): CONF.log_format overrides everything currently. This
# should be deprecated in favor of context aware formatting.
if CONF.log_format:
handler.setFormatter(logging.Formatter(fmt=CONF.log_format,
datefmt=datefmt))
log_root.info('Deprecated: log_format is now deprecated and will '
'be removed in the next release')
else:
handler.setFormatter(ContextFormatter(project=project,
version=version,
datefmt=datefmt))
if CONF.debug:
log_root.setLevel(logging.DEBUG)
elif CONF.verbose:
log_root.setLevel(logging.INFO)
else:
log_root.setLevel(logging.WARNING)
for pair in CONF.default_log_levels:
mod, _sep, level_name = pair.partition('=')
logger = logging.getLogger(mod)
# NOTE(AAzza) in python2.6 Logger.setLevel doesn't convert string name
# to integer code.
if sys.version_info < (2, 7):
level = logging.getLevelName(level_name)
logger.setLevel(level)
else:
logger.setLevel(level_name)
_loggers = {}
def getLogger(name='unknown', version='unknown'):
if name not in _loggers:
_loggers[name] = ContextAdapter(logging.getLogger(name),
name,
version)
return _loggers[name]
def getLazyLogger(name='unknown', version='unknown'):
"""Returns lazy logger.
Creates a pass-through logger that does not create the real logger
until it is really needed and delegates all calls to the real logger
once it is created.
"""
return LazyAdapter(name, version)
class WritableLogger(object):
"""A thin wrapper that responds to `write` and logs."""
def __init__(self, logger, level=logging.INFO):
self.logger = logger
self.level = level
def write(self, msg):
self.logger.log(self.level, msg.rstrip())
class ContextFormatter(logging.Formatter):
"""A context.RequestContext aware formatter configured through flags.
The flags used to set format strings are: logging_context_format_string
and logging_default_format_string. You can also specify
logging_debug_format_suffix to append extra formatting if the log level is
debug.
For information about what variables are available for the formatter see:
http://docs.python.org/library/logging.html#formatter
If available, uses the context value stored in TLS - local.store.context
"""
def __init__(self, *args, **kwargs):
"""Initialize ContextFormatter instance
Takes additional keyword arguments which can be used in the message
format string.
:keyword project: project name
:type project: string
:keyword version: project version
:type version: string
"""
self.project = kwargs.pop('project', 'unknown')
self.version = kwargs.pop('version', 'unknown')
logging.Formatter.__init__(self, *args, **kwargs)
def format(self, record):
"""Uses contextstring if request_id is set, otherwise default."""
# store project info
record.project = self.project
record.version = self.version
# store request info
context = getattr(local.store, 'context', None)
if context:
d = _dictify_context(context)
for k, v in d.items():
setattr(record, k, v)
# NOTE(sdague): default the fancier formatting params
# to an empty string so we don't throw an exception if
# they get used
for key in ('instance', 'color', 'user_identity'):
if key not in record.__dict__:
record.__dict__[key] = ''
if record.__dict__.get('request_id'):
self._fmt = CONF.logging_context_format_string
else:
self._fmt = CONF.logging_default_format_string
if (record.levelno == logging.DEBUG and
CONF.logging_debug_format_suffix):
self._fmt += " " + CONF.logging_debug_format_suffix
# Cache this on the record, Logger will respect our formatted copy
if record.exc_info:
record.exc_text = self.formatException(record.exc_info, record)
return logging.Formatter.format(self, record)
def formatException(self, exc_info, record=None):
"""Format exception output with CONF.logging_exception_prefix."""
if not record:
return logging.Formatter.formatException(self, exc_info)
stringbuffer = moves.StringIO()
traceback.print_exception(exc_info[0], exc_info[1], exc_info[2],
None, stringbuffer)
lines = stringbuffer.getvalue().split('\n')
stringbuffer.close()
if CONF.logging_exception_prefix.find('%(asctime)') != -1:
record.asctime = self.formatTime(record, self.datefmt)
formatted_lines = []
for line in lines:
pl = CONF.logging_exception_prefix % record.__dict__
fl = '%s%s' % (pl, line)
formatted_lines.append(fl)
return '\n'.join(formatted_lines)
class ColorHandler(logging.StreamHandler):
LEVEL_COLORS = {
logging.DEBUG: '\033[00;32m', # GREEN
logging.INFO: '\033[00;36m', # CYAN
logging.AUDIT: '\033[01;36m', # BOLD CYAN
logging.WARN: '\033[01;33m', # BOLD YELLOW
logging.ERROR: '\033[01;31m', # BOLD RED
logging.CRITICAL: '\033[01;31m', # BOLD RED
}
def format(self, record):
record.color = self.LEVEL_COLORS[record.levelno]
return logging.StreamHandler.format(self, record)
class DeprecatedConfig(Exception):
message = _("Fatal call to deprecated config: %(msg)s")
def __init__(self, msg):
super(Exception, self).__init__(self.message % dict(msg=msg))

140
cachemonkey/openstack/common/loopingcall.py
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@ -1,140 +0,0 @@
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Justin Santa Barbara
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sys
from eventlet import event
from eventlet import greenthread
from cachemonkey.openstack.common.gettextutils import _LE, _LW
from cachemonkey.openstack.common import log as logging
from cachemonkey.openstack.common import timeutils
LOG = logging.getLogger(__name__)
class LoopingCallDone(Exception):
"""Exception to break out and stop a LoopingCallBase.
The poll-function passed to LoopingCallBase can raise this exception to
break out of the loop normally. This is somewhat analogous to
StopIteration.
An optional return-value can be included as the argument to the exception;
this return-value will be returned by LoopingCallBase.wait()
"""
def __init__(self, retvalue=True):
""":param retvalue: Value that LoopingCallBase.wait() should return."""
self.retvalue = retvalue
class LoopingCallBase(object):
def __init__(self, f=None, *args, **kw):
self.args = args
self.kw = kw
self.f = f
self._running = False
self.done = None
def stop(self):
self._running = False
def wait(self):
return self.done.wait()
class FixedIntervalLoopingCall(LoopingCallBase):
"""A fixed interval looping call."""
def start(self, interval, initial_delay=None):
self._running = True
done = event.Event()
def _inner():
if initial_delay:
greenthread.sleep(initial_delay)
try:
while self._running:
start = timeutils.utcnow()
self.f(*self.args, **self.kw)
end = timeutils.utcnow()
if not self._running:
break
delay = interval - timeutils.delta_seconds(start, end)
if delay <= 0:
LOG.warn(_LW('task run outlasted interval by %s sec') %
-delay)
greenthread.sleep(delay if delay > 0 else 0)
except LoopingCallDone as e:
self.stop()
done.send(e.retvalue)
except Exception:
LOG.exception(_LE('in fixed duration looping call'))
done.send_exception(*sys.exc_info())
return
else:
done.send(True)
self.done = done
greenthread.spawn_n(_inner)
return self.done
class DynamicLoopingCall(LoopingCallBase):
"""A looping call which sleeps until the next known event.
The function called should return how long to sleep for before being
called again.
"""
def start(self, initial_delay=None, periodic_interval_max=None):
self._running = True
done = event.Event()
def _inner():
if initial_delay:
greenthread.sleep(initial_delay)
try:
while self._running:
idle = self.f(*self.args, **self.kw)
if not self._running:
break
if periodic_interval_max is not None:
idle = min(idle, periodic_interval_max)
LOG.debug('Dynamic looping call sleeping for %.02f '
'seconds', idle)
greenthread.sleep(idle)
except LoopingCallDone as e:
self.stop()
done.send(e.retvalue)
except Exception:
LOG.exception(_LE('in dynamic looping call'))
done.send_exception(*sys.exc_info())
return
else:
done.send(True)
self.done = done
greenthread.spawn(_inner)
return self.done

504
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@ -1,504 +0,0 @@
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Justin Santa Barbara
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Generic Node base class for all workers that run on hosts."""
import errno
import logging as std_logging
import os
import random
import signal
import sys
import time
try:
# Importing just the symbol here because the io module does not
# exist in Python 2.6.
from io import UnsupportedOperation # noqa
except ImportError:
# Python 2.6
UnsupportedOperation = None
import eventlet
from eventlet import event
from oslo.config import cfg
from cachemonkey.openstack.common import eventlet_backdoor
from cachemonkey.openstack.common.gettextutils import _LE, _LI, _LW
from cachemonkey.openstack.common import importutils
from cachemonkey.openstack.common import log as logging
from cachemonkey.openstack.common import systemd
from cachemonkey.openstack.common import threadgroup
rpc = importutils.try_import('cachemonkey.openstack.common.rpc')
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
def _sighup_supported():
return hasattr(signal, 'SIGHUP')
def _is_daemon():
# The process group for a foreground process will match the
# process group of the controlling terminal. If those values do
# not match, or ioctl() fails on the stdout file handle, we assume
# the process is running in the background as a daemon.
# http://www.gnu.org/software/bash/manual/bashref.html#Job-Control-Basics
try:
is_daemon = os.getpgrp() != os.tcgetpgrp(sys.stdout.fileno())
except OSError as err:
if err.errno == errno.ENOTTY:
# Assume we are a daemon because there is no terminal.
is_daemon = True
else:
raise
except UnsupportedOperation:
# Could not get the fileno for stdout, so we must be a daemon.
is_daemon = True
return is_daemon
def _is_sighup_and_daemon(signo):
if not (_sighup_supported() and signo == signal.SIGHUP):
# Avoid checking if we are a daemon, because the signal isn't
# SIGHUP.
return False
return _is_daemon()
def _signo_to_signame(signo):
signals = {signal.SIGTERM: 'SIGTERM',
signal.SIGINT: 'SIGINT'}
if _sighup_supported():
signals[signal.SIGHUP] = 'SIGHUP'
return signals[signo]
def _set_signals_handler(handler):
signal.signal(signal.SIGTERM, handler)
signal.signal(signal.SIGINT, handler)
if _sighup_supported():
signal.signal(signal.SIGHUP, handler)
class Launcher(object):
"""Launch one or more services and wait for them to complete."""
def __init__(self):
"""Initialize the service launcher.
:returns: None
"""
self.services = Services()
self.backdoor_port = eventlet_backdoor.initialize_if_enabled()
def launch_service(self, service):
"""Load and start the given service.
:param service: The service you would like to start.
:returns: None
"""
service.backdoor_port = self.backdoor_port
self.services.add(service)
def stop(self):
"""Stop all services which are currently running.
:returns: None
"""
self.services.stop()
def wait(self):
"""Waits until all services have been stopped, and then returns.
:returns: None
"""
self.services.wait()
def restart(self):
"""Reload config files and restart service.
:returns: None
"""
cfg.CONF.reload_config_files()
self.services.restart()
class SignalExit(SystemExit):
def __init__(self, signo, exccode=1):
super(SignalExit, self).__init__(exccode)
self.signo = signo
class ServiceLauncher(Launcher):
def _handle_signal(self, signo, frame):
# Allow the process to be killed again and die from natural causes
_set_signals_handler(signal.SIG_DFL)
raise SignalExit(signo)
def handle_signal(self):
_set_signals_handler(self._handle_signal)
def _wait_for_exit_or_signal(self, ready_callback=None):
status = None
signo = 0
LOG.debug('Full set of CONF:')
CONF.log_opt_values(LOG, std_logging.DEBUG)
try:
if ready_callback:
ready_callback()
super(ServiceLauncher, self).wait()
except SignalExit as exc:
signame = _signo_to_signame(exc.signo)
LOG.info(_LI('Caught %s, exiting'), signame)
status = exc.code
signo = exc.signo
except SystemExit as exc:
status = exc.code
finally:
self.stop()
if rpc:
try:
rpc.cleanup()
except Exception:
# We're shutting down, so it doesn't matter at this point.
LOG.exception(_LE('Exception during rpc cleanup.'))
return status, signo
def wait(self, ready_callback=None):
systemd.notify_once()
while True:
self.handle_signal()
status, signo = self._wait_for_exit_or_signal(ready_callback)
if not _is_sighup_and_daemon(signo):
return status
self.restart()
class ServiceWrapper(object):
def __init__(self, service, workers):
self.service = service
self.workers = workers
self.children = set()
self.forktimes = []
class ProcessLauncher(object):
def __init__(self, wait_interval=0.01):
"""Constructor.
:param wait_interval: The interval to sleep for between checks
of child process exit.
"""
self.children = {}
self.sigcaught = None
self.running = True
self.wait_interval = wait_interval
rfd, self.writepipe = os.pipe()
self.readpipe = eventlet.greenio.GreenPipe(rfd, 'r')
self.handle_signal()
def handle_signal(self):
_set_signals_handler(self._handle_signal)
def _handle_signal(self, signo, frame):
self.sigcaught = signo
self.running = False
# Allow the process to be killed again and die from natural causes
_set_signals_handler(signal.SIG_DFL)
def _pipe_watcher(self):
# This will block until the write end is closed when the parent
# dies unexpectedly
self.readpipe.read()
LOG.info(_LI('Parent process has died unexpectedly, exiting'))
sys.exit(1)
def _child_process_handle_signal(self):
# Setup child signal handlers differently
def _sigterm(*args):
signal.signal(signal.SIGTERM, signal.SIG_DFL)
raise SignalExit(signal.SIGTERM)
def _sighup(*args):
signal.signal(signal.SIGHUP, signal.SIG_DFL)
raise SignalExit(signal.SIGHUP)
signal.signal(signal.SIGTERM, _sigterm)
if _sighup_supported():
signal.signal(signal.SIGHUP, _sighup)
# Block SIGINT and let the parent send us a SIGTERM
signal.signal(signal.SIGINT, signal.SIG_IGN)
def _child_wait_for_exit_or_signal(self, launcher):
status = 0
signo = 0
# NOTE(johannes): All exceptions are caught to ensure this
# doesn't fallback into the loop spawning children. It would
# be bad for a child to spawn more children.
try:
launcher.wait()
except SignalExit as exc:
signame = _signo_to_signame(exc.signo)
LOG.info(_LI('Child caught %s, exiting'), signame)
status = exc.code
signo = exc.signo
except SystemExit as exc:
status = exc.code
except BaseException:
LOG.exception(_LE('Unhandled exception'))
status = 2
finally:
launcher.stop()
return status, signo
def _child_process(self, service):
self._child_process_handle_signal()
# Reopen the eventlet hub to make sure we don't share an epoll
# fd with parent and/or siblings, which would be bad
eventlet.hubs.use_hub()
# Close write to ensure only parent has it open
os.close(self.writepipe)
# Create greenthread to watch for parent to close pipe
eventlet.spawn_n(self._pipe_watcher)
# Reseed random number generator
random.seed()
launcher = Launcher()
launcher.launch_service(service)
return launcher
def _start_child(self, wrap):
if len(wrap.forktimes) > wrap.workers:
# Limit ourselves to one process a second (over the period of
# number of workers * 1 second). This will allow workers to
# start up quickly but ensure we don't fork off children that
# die instantly too quickly.
if time.time() - wrap.forktimes[0] < wrap.workers:
LOG.info(_LI('Forking too fast, sleeping'))
time.sleep(1)
wrap.forktimes.pop(0)
wrap.forktimes.append(time.time())
pid = os.fork()
if pid == 0:
launcher = self._child_process(wrap.service)
while True:
self._child_process_handle_signal()
status, signo = self._child_wait_for_exit_or_signal(launcher)
if not _is_sighup_and_daemon(signo):
break
launcher.restart()
os._exit(status)
LOG.info(_LI('Started child %d'), pid)
wrap.children.add(pid)
self.children[pid] = wrap
return pid
def launch_service(self, service, workers=1):
wrap = ServiceWrapper(service, workers)
LOG.info(_LI('Starting %d workers'), wrap.workers)
while self.running and len(wrap.children) < wrap.workers:
self._start_child(wrap)
def _wait_child(self):
try:
# Don't block if no child processes have exited
pid, status = os.waitpid(0, os.WNOHANG)
if not pid:
return None
except OSError as exc:
if exc.errno not in (errno.EINTR, errno.ECHILD):
raise
return None
if os.WIFSIGNALED(status):
sig = os.WTERMSIG(status)
LOG.info(_LI('Child %(pid)d killed by signal %(sig)d'),
dict(pid=pid, sig=sig))
else:
code = os.WEXITSTATUS(status)
LOG.info(_LI('Child %(pid)s exited with status %(code)d'),
dict(pid=pid, code=code))
if pid not in self.children:
LOG.warning(_LW('pid %d not in child list'), pid)
return None
wrap = self.children.pop(pid)
wrap.children.remove(pid)
return wrap
def _respawn_children(self):
while self.running:
wrap = self._wait_child()
if not wrap:
# Yield to other threads if no children have exited
# Sleep for a short time to avoid excessive CPU usage
# (see bug #1095346)
eventlet.greenthread.sleep(self.wait_interval)
continue
while self.running and len(wrap.children) < wrap.workers:
self._start_child(wrap)
def wait(self):
"""Loop waiting on children to die and respawning as necessary."""
systemd.notify_once()
LOG.debug('Full set of CONF:')
CONF.log_opt_values(LOG, std_logging.DEBUG)
try:
while True:
self.handle_signal()
self._respawn_children()
if self.sigcaught:
signame = _signo_to_signame(self.sigcaught)
LOG.info(_LI('Caught %s, stopping children'), signame)
if not _is_sighup_and_daemon(self.sigcaught):
break
for pid in self.children:
os.kill(pid, signal.SIGHUP)
self.running = True
self.sigcaught = None
except eventlet.greenlet.GreenletExit:
LOG.info(_LI("Wait called after thread killed. Cleaning up."))
for pid in self.children:
try:
os.kill(pid, signal.SIGTERM)
except OSError as exc:
if exc.errno != errno.ESRCH:
raise
# Wait for children to die
if self.children:
LOG.info(_LI('Waiting on %d children to exit'), len(self.children))
while self.children:
self._wait_child()
class Service(object):
"""Service object for binaries running on hosts."""
def __init__(self, threads=1000):
self.tg = threadgroup.ThreadGroup(threads)
# signal that the service is done shutting itself down:
self._done = event.Event()
def reset(self):
# NOTE(Fengqian): docs for Event.reset() recommend against using it
self._done = event.Event()
def start(self):
pass
def stop(self):
self.tg.stop()
self.tg.wait()
# Signal that service cleanup is done:
if not self._done.ready():
self._done.send()
def wait(self):
self._done.wait()
class Services(object):
def __init__(self):
self.services = []
self.tg = threadgroup.ThreadGroup()
self.done = event.Event()
def add(self, service):
self.services.append(service)
self.tg.add_thread(self.run_service, service, self.done)
def stop(self):
# wait for graceful shutdown of services:
for service in self.services:
service.stop()
service.wait()
# Each service has performed cleanup, now signal that the run_service
# wrapper threads can now die:
if not self.done.ready():
self.done.send()
# reap threads:
self.tg.stop()
def wait(self):
self.tg.wait()
def restart(self):
self.stop()
self.done = event.Event()
for restart_service in self.services:
restart_service.reset()
self.tg.add_thread(self.run_service, restart_service, self.done)
@staticmethod
def run_service(service, done):
"""Service start wrapper.
:param service: service to run
:param done: event to wait on until a shutdown is triggered
:returns: None
"""
service.start()
done.wait()
def launch(service, workers=1):
if workers is None or workers == 1:
launcher = ServiceLauncher()
launcher.launch_service(service)
else:
launcher = ProcessLauncher()
launcher.launch_service(service, workers=workers)
return launcher

239
cachemonkey/openstack/common/strutils.py
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@ -1,239 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
System-level utilities and helper functions.
"""
import math
import re
import sys
import unicodedata
import six
from cachemonkey.openstack.common.gettextutils import _
UNIT_PREFIX_EXPONENT = {
'k': 1,
'K': 1,
'Ki': 1,
'M': 2,
'Mi': 2,
'G': 3,
'Gi': 3,
'T': 4,
'Ti': 4,
}
UNIT_SYSTEM_INFO = {
'IEC': (1024, re.compile(r'(^[-+]?\d*\.?\d+)([KMGT]i?)?(b|bit|B)$')),
'SI': (1000, re.compile(r'(^[-+]?\d*\.?\d+)([kMGT])?(b|bit|B)$')),
}
TRUE_STRINGS = ('1', 't', 'true', 'on', 'y', 'yes')
FALSE_STRINGS = ('0', 'f', 'false', 'off', 'n', 'no')
SLUGIFY_STRIP_RE = re.compile(r"[^\w\s-]")
SLUGIFY_HYPHENATE_RE = re.compile(r"[-\s]+")
def int_from_bool_as_string(subject):
"""Interpret a string as a boolean and return either 1 or 0.
Any string value in:
('True', 'true', 'On', 'on', '1')
is interpreted as a boolean True.
Useful for JSON-decoded stuff and config file parsing
"""
return bool_from_string(subject) and 1 or 0
def bool_from_string(subject, strict=False, default=False):
"""Interpret a string as a boolean.
A case-insensitive match is performed such that strings matching 't',
'true', 'on', 'y', 'yes', or '1' are considered True and, when
`strict=False`, anything else returns the value specified by 'default'.
Useful for JSON-decoded stuff and config file parsing.
If `strict=True`, unrecognized values, including None, will raise a
ValueError which is useful when parsing values passed in from an API call.
Strings yielding False are 'f', 'false', 'off', 'n', 'no', or '0'.
"""
if not isinstance(subject, six.string_types):
subject = six.text_type(subject)
lowered = subject.strip().lower()
if lowered in TRUE_STRINGS:
return True
elif lowered in FALSE_STRINGS:
return False
elif strict:
acceptable = ', '.join(
"'%s'" % s for s in sorted(TRUE_STRINGS + FALSE_STRINGS))
msg = _("Unrecognized value '%(val)s', acceptable values are:"
" %(acceptable)s") % {'val': subject,
'acceptable': acceptable}
raise ValueError(msg)
else:
return default
def safe_decode(text, incoming=None, errors='strict'):
"""Decodes incoming text/bytes string using `incoming` if they're not
already unicode.
:param incoming: Text's current encoding
:param errors: Errors handling policy. See here for valid
values http://docs.python.org/2/library/codecs.html
:returns: text or a unicode `incoming` encoded
representation of it.
:raises TypeError: If text is not an instance of str
"""
if not isinstance(text, (six.string_types, six.binary_type)):
raise TypeError("%s can't be decoded" % type(text))
if isinstance(text, six.text_type):
return text
if not incoming:
incoming = (sys.stdin.encoding or
sys.getdefaultencoding())
try:
return text.decode(incoming, errors)
except UnicodeDecodeError:
# Note(flaper87) If we get here, it means that
# sys.stdin.encoding / sys.getdefaultencoding
# didn't return a suitable encoding to decode
# text. This happens mostly when global LANG
# var is not set correctly and there's no
# default encoding. In this case, most likely
# python will use ASCII or ANSI encoders as
# default encodings but they won't be capable
# of decoding non-ASCII characters.
#
# Also, UTF-8 is being used since it's an ASCII
# extension.
return text.decode('utf-8', errors)
def safe_encode(text, incoming=None,
encoding='utf-8', errors='strict'):
"""Encodes incoming text/bytes string using `encoding`.
If incoming is not specified, text is expected to be encoded with
current python's default encoding. (`sys.getdefaultencoding`)
:param incoming: Text's current encoding
:param encoding: Expected encoding for text (Default UTF-8)
:param errors: Errors handling policy. See here for valid
values http://docs.python.org/2/library/codecs.html
:returns: text or a bytestring `encoding` encoded
representation of it.
:raises TypeError: If text is not an instance of str
"""
if not isinstance(text, (six.string_types, six.binary_type)):
raise TypeError("%s can't be encoded" % type(text))
if not incoming:
incoming = (sys.stdin.encoding or
sys.getdefaultencoding())
if isinstance(text, six.text_type):
return text.encode(encoding, errors)
elif text and encoding != incoming:
# Decode text before encoding it with `encoding`
text = safe_decode(text, incoming, errors)
return text.encode(encoding, errors)
else:
return text
def string_to_bytes(text, unit_system='IEC', return_int=False):
"""Converts a string into an float representation of bytes.
The units supported for IEC ::
Kb(it), Kib(it), Mb(it), Mib(it), Gb(it), Gib(it), Tb(it), Tib(it)
KB, KiB, MB, MiB, GB, GiB, TB, TiB
The units supported for SI ::
kb(it), Mb(it), Gb(it), Tb(it)
kB, MB, GB, TB
Note that the SI unit system does not support capital letter 'K'
:param text: String input for bytes size conversion.
:param unit_system: Unit system for byte size conversion.
:param return_int: If True, returns integer representation of text
in bytes. (default: decimal)
:returns: Numerical representation of text in bytes.
:raises ValueError: If text has an invalid value.
"""
try:
base, reg_ex = UNIT_SYSTEM_INFO[unit_system]
except KeyError:
msg = _('Invalid unit system: "%s"') % unit_system
raise ValueError(msg)
match = reg_ex.match(text)
if match:
magnitude = float(match.group(1))
unit_prefix = match.group(2)
if match.group(3) in ['b', 'bit']:
magnitude /= 8
else:
msg = _('Invalid string format: %s') % text
raise ValueError(msg)
if not unit_prefix:
res = magnitude
else:
res = magnitude * pow(base, UNIT_PREFIX_EXPONENT[unit_prefix])
if return_int:
return int(math.ceil(res))
return res
def to_slug(value, incoming=None, errors="strict"):
"""Normalize string.
Convert to lowercase, remove non-word characters, and convert spaces
to hyphens.
Inspired by Django's `slugify` filter.
:param value: Text to slugify
:param incoming: Text's current encoding
:param errors: Errors handling policy. See here for valid
values http://docs.python.org/2/library/codecs.html
:returns: slugified unicode representation of `value`
:raises TypeError: If text is not an instance of str
"""
value = safe_decode(value, incoming, errors)
# NOTE(aababilov): no need to use safe_(encode|decode) here:
# encodings are always "ascii", error handling is always "ignore"
# and types are always known (first: unicode; second: str)
value = unicodedata.normalize("NFKD", value).encode(
"ascii", "ignore").decode("ascii")
value = SLUGIFY_STRIP_RE.sub("", value).strip().lower()
return SLUGIFY_HYPHENATE_RE.sub("-", value)

106
cachemonkey/openstack/common/systemd.py
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@ -1,106 +0,0 @@
# Copyright 2012-2014 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Helper module for systemd service readiness notification.
"""
import os
import socket
import sys
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
def _abstractify(socket_name):
if socket_name.startswith('@'):
# abstract namespace socket
socket_name = '\0%s' % socket_name[1:]
return socket_name
def _sd_notify(unset_env, msg):
notify_socket = os.getenv('NOTIFY_SOCKET')
if notify_socket:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
try:
sock.connect(_abstractify(notify_socket))
sock.sendall(msg)
if unset_env:
del os.environ['NOTIFY_SOCKET']
except EnvironmentError:
LOG.debug("Systemd notification failed", exc_info=True)
finally:
sock.close()
def notify():
"""Send notification to Systemd that service is ready.
For details see
http://www.freedesktop.org/software/systemd/man/sd_notify.html
"""
_sd_notify(False, 'READY=1')
def notify_once():
"""Send notification once to Systemd that service is ready.
Systemd sets NOTIFY_SOCKET environment variable with the name of the
socket listening for notifications from services.
This method removes the NOTIFY_SOCKET environment variable to ensure
notification is sent only once.
"""
_sd_notify(True, 'READY=1')
def onready(notify_socket, timeout):
"""Wait for systemd style notification on the socket.
:param notify_socket: local socket address
:type notify_socket: string
:param timeout: socket timeout
:type timeout: float
:returns: 0 service ready
1 service not ready
2 timeout occurred
"""
sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
sock.settimeout(timeout)
sock.bind(_abstractify(notify_socket))
try:
msg = sock.recv(512)
except socket.timeout:
return 2
finally:
sock.close()
if 'READY=1' in msg:
return 0
else:
return 1
if __name__ == '__main__':
# simple CLI for testing
if len(sys.argv) == 1:
notify()
elif len(sys.argv) >= 2:
timeout = float(sys.argv[1])
notify_socket = os.getenv('NOTIFY_SOCKET')
if notify_socket:
retval = onready(notify_socket, timeout)
sys.exit(retval)

147
cachemonkey/openstack/common/threadgroup.py
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@ -1,147 +0,0 @@
# Copyright 2012 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import threading
import eventlet
from eventlet import greenpool
from cachemonkey.openstack.common import log as logging
from cachemonkey.openstack.common import loopingcall
LOG = logging.getLogger(__name__)
def _thread_done(gt, *args, **kwargs):
"""Callback function to be passed to GreenThread.link() when we spawn()
Calls the :class:`ThreadGroup` to notify if.
"""
kwargs['group'].thread_done(kwargs['thread'])
class Thread(object):
"""Wrapper around a greenthread, that holds a reference to the
:class:`ThreadGroup`. The Thread will notify the :class:`ThreadGroup` when
it has done so it can be removed from the threads list.
"""
def __init__(self, thread, group):
self.thread = thread
self.thread.link(_thread_done, group=group, thread=self)
def stop(self):
self.thread.kill()
def wait(self):
return self.thread.wait()
def link(self, func, *args, **kwargs):
self.thread.link(func, *args, **kwargs)
class ThreadGroup(object):
"""The point of the ThreadGroup class is to:
* keep track of timers and greenthreads (making it easier to stop them
when need be).
* provide an easy API to add timers.
"""
def __init__(self, thread_pool_size=10):
self.pool = greenpool.GreenPool(thread_pool_size)
self.threads = []
self.timers = []
def add_dynamic_timer(self, callback, initial_delay=None,
periodic_interval_max=None, *args, **kwargs):
timer = loopingcall.DynamicLoopingCall(callback, *args, **kwargs)
timer.start(initial_delay=initial_delay,
periodic_interval_max=periodic_interval_max)
self.timers.append(timer)
def add_timer(self, interval, callback, initial_delay=None,
*args, **kwargs):
pulse = loopingcall.FixedIntervalLoopingCall(callback, *args, **kwargs)
pulse.start(interval=interval,
initial_delay=initial_delay)
self.timers.append(pulse)
def add_thread(self, callback, *args, **kwargs):
gt = self.pool.spawn(callback, *args, **kwargs)
th = Thread(gt, self)
self.threads.append(th)
return th
def thread_done(self, thread):
self.threads.remove(thread)
def _stop_threads(self):
current = threading.current_thread()
# Iterate over a copy of self.threads so thread_done doesn't
# modify the list while we're iterating
for x in self.threads[:]:
if x is current:
# don't kill the current thread.
continue
try:
x.stop()
except Exception as ex:
LOG.exception(ex)
def stop_timers(self):
for x in self.timers:
try:
x.stop()
except Exception as ex:
LOG.exception(ex)
self.timers = []
def stop(self, graceful=False):
"""stop function has the option of graceful=True/False.
* In case of graceful=True, wait for all threads to be finished.
Never kill threads.
* In case of graceful=False, kill threads immediately.
"""
self.stop_timers()
if graceful:
# In case of graceful=True, wait for all threads to be
# finished, never kill threads
self.wait()
else:
# In case of graceful=False(Default), kill threads
# immediately
self._stop_threads()
def wait(self):
for x in self.timers:
try:
x.wait()
except eventlet.greenlet.GreenletExit:
pass
except Exception as ex:
LOG.exception(ex)
current = threading.current_thread()
# Iterate over a copy of self.threads so thread_done doesn't
# modify the list while we're iterating
for x in self.threads[:]:
if x is current:
continue
try:
x.wait()
except eventlet.greenlet.GreenletExit:
pass
except Exception as ex:
LOG.exception(ex)

210
cachemonkey/openstack/common/timeutils.py
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@ -1,210 +0,0 @@
# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Time related utilities and helper functions.
"""
import calendar
import datetime
import time
import iso8601
import six
# ISO 8601 extended time format with microseconds
_ISO8601_TIME_FORMAT_SUBSECOND = '%Y-%m-%dT%H:%M:%S.%f'
_ISO8601_TIME_FORMAT = '%Y-%m-%dT%H:%M:%S'
PERFECT_TIME_FORMAT = _ISO8601_TIME_FORMAT_SUBSECOND
def isotime(at=None, subsecond=False):
"""Stringify time in ISO 8601 format."""
if not at:
at = utcnow()
st = at.strftime(_ISO8601_TIME_FORMAT
if not subsecond
else _ISO8601_TIME_FORMAT_SUBSECOND)
tz = at.tzinfo.tzname(None) if at.tzinfo else 'UTC'
st += ('Z' if tz == 'UTC' else tz)
return st
def parse_isotime(timestr):
"""Parse time from ISO 8601 format."""
try:
return iso8601.parse_date(timestr)
except iso8601.ParseError as e:
raise ValueError(six.text_type(e))
except TypeError as e:
raise ValueError(six.text_type(e))
def strtime(at=None, fmt=PERFECT_TIME_FORMAT):
"""Returns formatted utcnow."""
if not at:
at = utcnow()
return at.strftime(fmt)
def parse_strtime(timestr, fmt=PERFECT_TIME_FORMAT):
"""Turn a formatted time back into a datetime."""
return datetime.datetime.strptime(timestr, fmt)
def normalize_time(timestamp):
"""Normalize time in arbitrary timezone to UTC naive object."""
offset = timestamp.utcoffset()
if offset is None:
return timestamp
return timestamp.replace(tzinfo=None) - offset
def is_older_than(before, seconds):
"""Return True if before is older than seconds."""
if isinstance(before, six.string_types):
before = parse_strtime(before).replace(tzinfo=None)
else:
before = before.replace(tzinfo=None)
return utcnow() - before > datetime.timedelta(seconds=seconds)
def is_newer_than(after, seconds):
"""Return True if after is newer than seconds."""
if isinstance(after, six.string_types):
after = parse_strtime(after).replace(tzinfo=None)
else:
after = after.replace(tzinfo=None)
return after - utcnow() > datetime.timedelta(seconds=seconds)
def utcnow_ts():
"""Timestamp version of our utcnow function."""
if utcnow.override_time is None:
# NOTE(kgriffs): This is several times faster
# than going through calendar.timegm(...)
return int(time.time())
return calendar.timegm(utcnow().timetuple())
def utcnow():
"""Overridable version of utils.utcnow."""
if utcnow.override_time:
try:
return utcnow.override_time.pop(0)
except AttributeError:
return utcnow.override_time
return datetime.datetime.utcnow()
def iso8601_from_timestamp(timestamp):
"""Returns a iso8601 formatted date from timestamp."""
return isotime(datetime.datetime.utcfromtimestamp(timestamp))
utcnow.override_time = None
def set_time_override(override_time=None):
"""Overrides utils.utcnow.
Make it return a constant time or a list thereof, one at a time.
:param override_time: datetime instance or list thereof. If not
given, defaults to the current UTC time.
"""
utcnow.override_time = override_time or datetime.datetime.utcnow()
def advance_time_delta(timedelta):
"""Advance overridden time using a datetime.timedelta."""
assert(not utcnow.override_time is None)
try:
for dt in utcnow.override_time:
dt += timedelta
except TypeError:
utcnow.override_time += timedelta
def advance_time_seconds(seconds):
"""Advance overridden time by seconds."""
advance_time_delta(datetime.timedelta(0, seconds))
def clear_time_override():
"""Remove the overridden time."""
utcnow.override_time = None
def marshall_now(now=None):
"""Make an rpc-safe datetime with microseconds.
Note: tzinfo is stripped, but not required for relative times.
"""
if not now:
now = utcnow()
return dict(day=now.day, month=now.month, year=now.year, hour=now.hour,
minute=now.minute, second=now.second,
microsecond=now.microsecond)
def unmarshall_time(tyme):
"""Unmarshall a datetime dict."""
return datetime.datetime(day=tyme['day'],
month=tyme['month'],
year=tyme['year'],
hour=tyme['hour'],
minute=tyme['minute'],
second=tyme['second'],
microsecond=tyme['microsecond'])
def delta_seconds(before, after):
"""Return the difference between two timing objects.
Compute the difference in seconds between two date, time, or
datetime objects (as a float, to microsecond resolution).
"""
delta = after - before
return total_seconds(delta)
def total_seconds(delta):
"""Return the total seconds of datetime.timedelta object.
Compute total seconds of datetime.timedelta, datetime.timedelta
doesn't have method total_seconds in Python2.6, calculate it manually.
"""
try:
return delta.total_seconds()
except AttributeError:
return ((delta.days * 24 * 3600) + delta.seconds +
float(delta.microseconds) / (10 ** 6))
def is_soon(dt, window):
"""Determines if time is going to happen in the next window seconds.
:param dt: the time
:param window: minimum seconds to remain to consider the time not soon
:return: True if expiration is within the given duration
"""
soon = (utcnow() + datetime.timedelta(seconds=window))
return normalize_time(dt) <= soon

0
cachemonkey/publisher/__init__.py
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27
cachemonkey/publisher/nop.py
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@ -1,27 +0,0 @@
# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from cachemonkey.openstack.common import log as logging
LOG = logging.getLogger(__name__)
class Publisher(object):
"""A do-nothing publisher. Use when no special work is required to
prepare an image for distribution to computes.
"""
def publish(self, image, filename):
pass

45
cachemonkey/service.py
View File

@ -1,45 +0,0 @@
# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo.config import cfg
from cachemonkey import cacher
from cachemonkey.openstack.common import log as logging
from cachemonkey.openstack.common import service
LOG = logging.getLogger(__name__)
opts = [
cfg.IntOpt('periodic_delay', default=30, help='Delay between cacher runs')
]
CONF = cfg.CONF
CONF.register_opts(opts)
class Service(service.Service):
def __init__(self):
super(Service, self).__init__()
self.cacher = cacher.Cacher()
def start(self):
super(Service, self).start()
LOG.info("Cachemonkey service initializing...")
self.tg.add_timer(CONF.periodic_delay, self.cacher.cache)
def stop(self):
LOG.info("Cachemonkey service shutting down...")
super(Service, self).stop()

0
cachemonkey/tests/__init__.py
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28
cachemonkey/tests/base.py
View File

@ -1,28 +0,0 @@
# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo.config import cfg
from oslotest import base
CONF = cfg.CONF
class BaseTestCase(base.BaseTestCase):
def flags(self, **kw):
"""Override flag variables for a test."""
group = kw.pop('group', None)
for k, v in kw.iteritems():
CONF.set_override(k, v, group)

0
cachemonkey/tests/publisher/__init__.py
View File

27
cachemonkey/tests/publisher/test_nop.py
View File

@ -1,27 +0,0 @@
# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslotest import base
from cachemonkey.publisher import nop
class NopPublisherTestCase(base.BaseTestCase):
def test_nop(self):
publisher = nop.Publisher()
image = {'id': '1234'}
filename = '/abc/def'
publisher.publish(image, filename)

53
cachemonkey/tests/test_glance.py
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@ -1,53 +0,0 @@
# Copyright 2014 Rackspace Hosting
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import mock
from cachemonkey import glance
from cachemonkey.tests import base
class GlanceTestCase(base.BaseTestCase):
def setUp(self):
super(GlanceTestCase, self).setUp()
self.endpoints = ['http://1.2.3.4:1234', 'http://2.3.4.5:2345']
self.flags(endpoints=self.endpoints, group='glance')
class FakeAuthClient(object):
token = 'token'
def auth(self):
return
fake_auth_client = FakeAuthClient()
self.client = glance.Client(auth_client=fake_auth_client)
@mock.patch('glanceclient.Client')
def test_endpoint_round_robin(self, mock_glanceclient):
api_version = 2
for i in range(len(self.endpoints)):
self.client.dosomething()
call = mock.call(api_version, self.endpoints[i], token='token')
self.assertEqual(call, mock_glanceclient.call_args)
# call once more to confirm first endpoint is used again
self.client.dosomething()
call = mock.call(api_version, self.endpoints[0], token='token')
self.assertEqual(call, mock_glanceclient.call_args)

8
openstack-common.conf
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@ -1,8 +0,0 @@
[DEFAULT]
# The list of modules to copy from oslo-incubator
module=lockutils
module=service
# The base module to hold the copy of openstack.common
base=cachemonkey

8
requirements.txt
View File

@ -1,8 +0,0 @@
Babel>=1.3
eventlet>=0.13.0
iso8601>=0.1.9
oslo.config>=1.2.0
pbr>=0.6,!=0.7,<1.0
posix_ipc
python-glanceclient>=0.9.0
python-keystoneclient>=0.9.0

37
setup.cfg
View File

@ -1,37 +0,0 @@
[metadata]
name = cachemonkey
version = 0.0.1
summary = Cachemonkey image pre-caching
description-file =
README.rst
license = Apache License, Version 2.0
home-page = http://www.openstack.org
classifiers =
Programming Language :: Python
Programming Language :: Python :: 2
Programming Language :: Python :: 2.6
Programming Language :: Python :: 2.7
Environment :: OpenStack
Intended Audience :: Information Technology
Intended Audience :: System Administrators
License :: OSI Approved :: Apache Software License
Operating System :: POSIX :: Linux
author = Cachemonkey Team
author-email = openstack-dev@lists.openstack.org
[files]
packages =
cachemonkey
[build_sphinx]
source-dir = doc/source
build-dir = doc/build
all_files = 1
[upload_sphinx]
upload-dir = doc/build/html
[entry_points]
console_scripts =
cachemonkey-server = cachemonkey.cmd.server:main
cachemonkey-shell = cachemonkey.cmd.shell:main

22
setup.py
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@ -1,22 +0,0 @@
#!/usr/bin/env python
# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
import setuptools
setuptools.setup(
setup_requires=['pbr'],
pbr=True)

4
test-requirements.txt
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@ -1,4 +0,0 @@
coverage>=3.6
hacking>=0.8.0,<0.9
oslotest
pylint==0.25.2

200
tools/lintstack.head.py
View File

@ -1,200 +0,0 @@
#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2012, AT&T Labs, Yun Mao <yunmao@gmail.com>
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# Stolen from OpenStack Nova
"""pylint error checking."""
import cStringIO as StringIO
import json
import re
import sys
from pylint import lint
from pylint.reporters import text
# Note(maoy): E1103 is error code related to partial type inference
ignore_codes = ["E1103"]
# Note(maoy): the error message is the pattern of E0202. It should be ignored
# for cachemonkey.tests modules
ignore_messages = ["An attribute affected in cachemonkey.tests"]
# We ignore all errors in openstack.common because it should be checked
# elsewhere.
ignore_modules = ["cachemonkey/openstack/common/"]
KNOWN_PYLINT_EXCEPTIONS_FILE = "tools/pylint_exceptions"
class LintOutput(object):
_cached_filename = None
_cached_content = None
def __init__(self, filename, lineno, line_content, code, message,
lintoutput):
self.filename = filename
self.lineno = lineno
self.line_content = line_content
self.code = code
self.message = message
self.lintoutput = lintoutput
@classmethod
def from_line(cls, line):
m = re.search(r"(\S+):(\d+): \[(\S+)(, \S+)?] (.*)", line)
matched = m.groups()
filename, lineno, code, message = (matched[0], int(matched[1]),
matched[2], matched[-1])
if cls._cached_filename != filename:
with open(filename) as f:
cls._cached_content = list(f.readlines())
cls._cached_filename = filename
line_content = cls._cached_content[lineno - 1].rstrip()
return cls(filename, lineno, line_content, code, message,
line.rstrip())
@classmethod
def from_msg_to_dict(cls, msg):
"""From the output of pylint msg, to a dict, where each key
is a unique error identifier, value is a list of LintOutput
"""
result = {}
for line in msg.splitlines():
obj = cls.from_line(line)
if obj.is_ignored():
continue
key = obj.key()
if key not in result:
result[key] = []
result[key].append(obj)
return result
def is_ignored(self):
if self.code in ignore_codes:
return True
if any(self.filename.startswith(name) for name in ignore_modules):
return True
if any(msg in self.message for msg in ignore_messages):
return True
return False
def key(self):
if self.code in ["E1101", "E1103"]:
# These two types of errors are like Foo class has no member bar.
# We discard the source code so that the error will be ignored
# next time another Foo.bar is encountered.
return self.message, ""
return self.message, self.line_content.strip()
def json(self):
return json.dumps(self.__dict__)
def review_str(self):
return ("File %(filename)s\nLine %(lineno)d:%(line_content)s\n"
"%(code)s: %(message)s" % self.__dict__)
class ErrorKeys(object):
@classmethod
def print_json(cls, errors, output=sys.stdout):
print >>output, "# automatically generated by tools/lintstack.py"
for i in sorted(errors.keys()):
print >>output, json.dumps(i)
@classmethod
def from_file(cls, filename):
keys = set()
for line in open(filename):
if line and line[0] != "#":
d = json.loads(line)
keys.add(tuple(d))
return keys
def run_pylint():
buff = StringIO.StringIO()
reporter = text.ParseableTextReporter(output=buff)
args = ["--include-ids=y", "-E", "cachemonkey"]
lint.Run(args, reporter=reporter, exit=False)
val = buff.getvalue()
buff.close()
return val
def generate_error_keys(msg=None):
print "Generating", KNOWN_PYLINT_EXCEPTIONS_FILE
if msg is None:
msg = run_pylint()
errors = LintOutput.from_msg_to_dict(msg)
with open(KNOWN_PYLINT_EXCEPTIONS_FILE, "w") as f:
ErrorKeys.print_json(errors, output=f)
def validate(newmsg=None):
print "Loading", KNOWN_PYLINT_EXCEPTIONS_FILE
known = ErrorKeys.from_file(KNOWN_PYLINT_EXCEPTIONS_FILE)
if newmsg is None:
print "Running pylint. Be patient..."
newmsg = run_pylint()
errors = LintOutput.from_msg_to_dict(newmsg)
print "Unique errors reported by pylint: was %d, now %d." \
% (len(known), len(errors))
passed = True
for err_key, err_list in errors.items():
for err in err_list:
if err_key not in known:
print err.lintoutput
print
passed = False
if passed:
print "Congrats! pylint check passed."
redundant = known - set(errors.keys())
if redundant:
print "Extra credit: some known pylint exceptions disappeared."
for i in sorted(redundant):
print json.dumps(i)
print "Consider regenerating the exception file if you will."
else:
print ("Please fix the errors above. If you believe they are false"
" positives, run 'tools/lintstack.py generate' to overwrite.")
sys.exit(1)
def usage():
print """Usage: tools/lintstack.py [generate|validate]
To generate pylint_exceptions file: tools/lintstack.py generate
To validate the current commit: tools/lintstack.py
"""
def main():
option = "validate"
if len(sys.argv) > 1:
option = sys.argv[1]
if option == "generate":
generate_error_keys()
elif option == "validate":
validate()
else:
usage()
if __name__ == "__main__":
main()

200
tools/lintstack.py
View File

@ -1,200 +0,0 @@
#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2012, AT&T Labs, Yun Mao <yunmao@gmail.com>
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# Stolen from OpenStack Nova
"""pylint error checking."""
import cStringIO as StringIO
import json
import re
import sys
from pylint import lint
from pylint.reporters import text
# Note(maoy): E1103 is error code related to partial type inference
ignore_codes = ["E1103"]
# Note(maoy): the error message is the pattern of E0202. It should be ignored
# for cachemonkey.tests modules
ignore_messages = ["An attribute affected in cachemonkey.tests"]
# We ignore all errors in openstack.common because it should be checked
# elsewhere.
ignore_modules = ["cachemonkey/openstack/common/"]
KNOWN_PYLINT_EXCEPTIONS_FILE = "tools/pylint_exceptions"
class LintOutput(object):
_cached_filename = None
_cached_content = None
def __init__(self, filename, lineno, line_content, code, message,
lintoutput):
self.filename = filename
self.lineno = lineno
self.line_content = line_content
self.code = code
self.message = message
self.lintoutput = lintoutput
@classmethod
def from_line(cls, line):
m = re.search(r"(\S+):(\d+): \[(\S+)(, \S+)?] (.*)", line)
matched = m.groups()
filename, lineno, code, message = (matched[0], int(matched[1]),
matched[2], matched[-1])
if cls._cached_filename != filename:
with open(filename) as f:
cls._cached_content = list(f.readlines())
cls._cached_filename = filename
line_content = cls._cached_content[lineno - 1].rstrip()
return cls(filename, lineno, line_content, code, message,
line.rstrip())
@classmethod
def from_msg_to_dict(cls, msg):
"""From the output of pylint msg, to a dict, where each key
is a unique error identifier, value is a list of LintOutput
"""
result = {}
for line in msg.splitlines():
obj = cls.from_line(line)
if obj.is_ignored():
continue
key = obj.key()
if key not in result:
result[key] = []
result[key].append(obj)
return result
def is_ignored(self):
if self.code in ignore_codes:
return True
if any(self.filename.startswith(name) for name in ignore_modules):
return True
if any(msg in self.message for msg in ignore_messages):
return True
return False
def key(self):
if self.code in ["E1101", "E1103"]:
# These two types of errors are like Foo class has no member bar.
# We discard the source code so that the error will be ignored
# next time another Foo.bar is encountered.
return self.message, ""
return self.message, self.line_content.strip()
def json(self):
return json.dumps(self.__dict__)
def review_str(self):
return ("File %(filename)s\nLine %(lineno)d:%(line_content)s\n"
"%(code)s: %(message)s" % self.__dict__)
class ErrorKeys(object):
@classmethod
def print_json(cls, errors, output=sys.stdout):
print >>output, "# automatically generated by tools/lintstack.py"
for i in sorted(errors.keys()):
print >>output, json.dumps(i)
@classmethod
def from_file(cls, filename):
keys = set()
for line in open(filename):
if line and line[0] != "#":
d = json.loads(line)
keys.add(tuple(d))
return keys
def run_pylint():
buff = StringIO.StringIO()
reporter = text.ParseableTextReporter(output=buff)
args = ["--include-ids=y", "-E", "cachemonkey"]
lint.Run(args, reporter=reporter, exit=False)
val = buff.getvalue()
buff.close()
return val
def generate_error_keys(msg=None):
print "Generating", KNOWN_PYLINT_EXCEPTIONS_FILE
if msg is None:
msg = run_pylint()
errors = LintOutput.from_msg_to_dict(msg)
with open(KNOWN_PYLINT_EXCEPTIONS_FILE, "w") as f:
ErrorKeys.print_json(errors, output=f)
def validate(newmsg=None):
print "Loading", KNOWN_PYLINT_EXCEPTIONS_FILE
known = ErrorKeys.from_file(KNOWN_PYLINT_EXCEPTIONS_FILE)
if newmsg is None:
print "Running pylint. Be patient..."
newmsg = run_pylint()
errors = LintOutput.from_msg_to_dict(newmsg)
print "Unique errors reported by pylint: was %d, now %d." \
% (len(known), len(errors))
passed = True
for err_key, err_list in errors.items():
for err in err_list:
if err_key not in known:
print err.lintoutput
print
passed = False
if passed:
print "Congrats! pylint check passed."
redundant = known - set(errors.keys())
if redundant:
print "Extra credit: some known pylint exceptions disappeared."
for i in sorted(redundant):
print json.dumps(i)
print "Consider regenerating the exception file if you will."
else:
print ("Please fix the errors above. If you believe they are false"
" positives, run 'tools/lintstack.py generate' to overwrite.")
sys.exit(1)
def usage():
print """Usage: tools/lintstack.py [generate|validate]
To generate pylint_exceptions file: tools/lintstack.py generate
To validate the current commit: tools/lintstack.py
"""
def main():
option = "validate"
if len(sys.argv) > 1:
option = sys.argv[1]
if option == "generate":
generate_error_keys()
elif option == "validate":
validate()
else:
usage()
if __name__ == "__main__":
main()

61
tools/lintstack.sh
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@ -1,61 +0,0 @@
#!/usr/bin/env bash
# Copyright (c) 2012-2013, AT&T Labs, Yun Mao <yunmao@gmail.com>
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# Stolen from OpenStack Nova
# Use lintstack.py to compare pylint errors.
# We run pylint twice, once on HEAD, once on the code before the latest
# commit for review.
set -e
TOOLS_DIR=$(cd $(dirname "$0") && pwd)
# Get the current branch name.
GITHEAD=`git rev-parse --abbrev-ref HEAD`
if [[ "$GITHEAD" == "HEAD" ]]; then
# In detached head mode, get revision number instead
GITHEAD=`git rev-parse HEAD`
echo "Currently we are at commit $GITHEAD"
else
echo "Currently we are at branch $GITHEAD"
fi
cp -f $TOOLS_DIR/lintstack.py $TOOLS_DIR/lintstack.head.py
if git rev-parse HEAD^2 2>/dev/null; then
# The HEAD is a Merge commit. Here, the patch to review is
# HEAD^2, the master branch is at HEAD^1, and the patch was
# written based on HEAD^2~1.
PREV_COMMIT=`git rev-parse HEAD^2~1`
git checkout HEAD~1
# The git merge is necessary for reviews with a series of patches.
# If not, this is a no-op so won't hurt either.
git merge $PREV_COMMIT
else
# The HEAD is not a merge commit. This won't happen on gerrit.
# Most likely you are running against your own patch locally.
# We assume the patch to examine is HEAD, and we compare it against
# HEAD~1
git checkout HEAD~1
fi
# First generate tools/pylint_exceptions from HEAD~1
$TOOLS_DIR/lintstack.head.py generate
# Then use that as a reference to compare against HEAD
git checkout $GITHEAD
$TOOLS_DIR/lintstack.head.py
echo "Check passed. FYI: the pylint exceptions are:"
cat $TOOLS_DIR/pylint_exceptions

39
tox.ini
View File

@ -1,39 +0,0 @@
[tox]
envlist = py26,py27,pep8
minversion = 1.6
skipsdist = True
[testenv]
usedevelop = True
install_command = pip install -U {opts} {packages}
setenv =
VIRTUAL_ENV={envdir}
LANG=en_US.UTF-8
LANGUAGE=en_US:en
LC_ALL=C
deps =
-r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
commands =
#python -m cachemonkey.openstack.common.lockutils python setup.py test --slowest --testr-args='{posargs}'
python -m cachemonkey.openstack.common.lockutils python setup.py test
[testenv:pep8]
commands = flake8 {posargs}
[testenv:cover]
setenv = VIRTUAL_ENV={envdir}
commands = python setup.py testr --coverage --testr-args='^(?!.*test.*coverage).*$'
[testenv:venv]
commands = {posargs}
[testenv:pylint]
setenv = VIRTUAL_ENV={envdir}
commands = bash tools/lintstack.sh
[flake8]
show-source = true
ignore = H803
builtins = _
exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,tools