121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
# (C) Copyright 2016 Hewlett Packard Enterprise Development Company LP
|
|
#
|
|
# 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 hashlib
|
|
import json
|
|
|
|
from cassandra.query import BatchStatement
|
|
from oslo_log import log
|
|
import urllib
|
|
|
|
from repositories.cassandra.abstract_repository import AbstractCassandraRepository
|
|
from repositories.utils import parse_measurement_message
|
|
|
|
LOG = log.getLogger(__name__)
|
|
|
|
|
|
class MetricCassandraRepository(AbstractCassandraRepository):
|
|
|
|
def __init__(self):
|
|
|
|
super(MetricCassandraRepository, self).__init__()
|
|
|
|
self._insert_measurement_stmt = self.cassandra_session.prepare(
|
|
'insert into measurements (tenant_id,'
|
|
'region, metric_hash, time_stamp, value,'
|
|
'value_meta) values (?, ?, ?, ?, ?, ?)')
|
|
|
|
self._insert_metric_map_stmt = self.cassandra_session.prepare(
|
|
'insert into metric_map (tenant_id,'
|
|
'region, metric_hash, '
|
|
'metric_set) values'
|
|
'(?,?,?,?)')
|
|
|
|
def process_message(self, message):
|
|
|
|
(dimensions, metric_name, region, tenant_id, time_stamp, value,
|
|
value_meta) = parse_measurement_message(message)
|
|
|
|
metric_hash, metric_set = create_metric_hash(metric_name,
|
|
dimensions)
|
|
|
|
measurement = (tenant_id.encode('utf8'),
|
|
region.encode('utf8'),
|
|
metric_hash,
|
|
time_stamp,
|
|
value,
|
|
json.dumps(value_meta, ensure_ascii=False).encode(
|
|
'utf8'))
|
|
|
|
LOG.debug(measurement)
|
|
|
|
return MetricMeasurementInfo(
|
|
tenant_id.encode('utf8'),
|
|
region.encode('utf8'),
|
|
metric_hash,
|
|
metric_set,
|
|
measurement)
|
|
|
|
def write_batch(self, metric_measurement_infos):
|
|
|
|
for metric_measurement_info in metric_measurement_infos:
|
|
|
|
self._batch_stmt.add(self._insert_measurement_stmt,
|
|
metric_measurement_info.measurement)
|
|
|
|
metric_map = (metric_measurement_info.tenant_id,
|
|
metric_measurement_info.region,
|
|
metric_measurement_info.metric_hash,
|
|
metric_measurement_info.metric_set)
|
|
|
|
self._batch_stmt.add(self._insert_metric_map_stmt,
|
|
metric_map)
|
|
|
|
self.cassandra_session.execute(self._batch_stmt)
|
|
|
|
self._batch_stmt = BatchStatement()
|
|
|
|
|
|
class MetricMeasurementInfo(object):
|
|
|
|
def __init__(self, tenant_id, region, metric_hash, metric_set,
|
|
measurement):
|
|
|
|
self.tenant_id = tenant_id
|
|
self.region = region
|
|
self.metric_hash = metric_hash
|
|
self.metric_set = metric_set
|
|
self.measurement = measurement
|
|
|
|
|
|
def create_metric_hash(metric_name, dimensions):
|
|
|
|
metric_name_part = '__name__' + '=' + urllib.quote_plus(metric_name)
|
|
|
|
hash_string = metric_name_part
|
|
|
|
metric_set = set()
|
|
|
|
metric_set.add(metric_name_part)
|
|
|
|
for dim_name in sorted(dimensions.iterkeys()):
|
|
dimension = (urllib.quote_plus(dim_name) + '=' + urllib.quote_plus(
|
|
dimensions[dim_name]))
|
|
metric_set.add(dimension)
|
|
hash_string += dimension
|
|
|
|
sha1_hash = hashlib.sha1(hash_string).hexdigest()
|
|
|
|
return bytearray.fromhex(sha1_hash), metric_set
|