170 lines
5.4 KiB
Python
170 lines
5.4 KiB
Python
# Copyright 2013 - Mirantis, 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 json
|
|
|
|
from oslo_config import cfg
|
|
from oslo_log import log as logging
|
|
from oslo_service import periodic_task
|
|
from oslo_service import threadgroup
|
|
|
|
from mistral import context as auth_ctx
|
|
from mistral.db.v2 import api as db_api_v2
|
|
from mistral import exceptions as exc
|
|
from mistral.rpc import clients as rpc
|
|
from mistral.services import security
|
|
from mistral.services import triggers
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
CONF = cfg.CONF
|
|
|
|
# {periodic_task: thread_group}
|
|
_periodic_tasks = {}
|
|
|
|
|
|
class MistralPeriodicTasks(periodic_task.PeriodicTasks):
|
|
@periodic_task.periodic_task(spacing=1, run_immediately=True)
|
|
def process_cron_triggers_v2(self, ctx):
|
|
LOG.debug("Processing cron triggers...")
|
|
|
|
for trigger in triggers.get_next_cron_triggers():
|
|
LOG.debug("Processing cron trigger: %s", trigger)
|
|
|
|
try:
|
|
# Setup admin context before schedule triggers.
|
|
ctx = security.create_context(
|
|
trigger.trust_id,
|
|
trigger.project_id
|
|
)
|
|
|
|
auth_ctx.set_ctx(ctx)
|
|
|
|
LOG.debug("Cron trigger security context: %s", ctx)
|
|
|
|
# Try to advance the cron trigger next_execution_time and
|
|
# remaining_executions if relevant.
|
|
modified = advance_cron_trigger(trigger)
|
|
|
|
# If cron trigger was not already modified by another engine.
|
|
if modified:
|
|
LOG.debug(
|
|
"Starting workflow '%s' by cron trigger '%s'",
|
|
trigger.workflow.name,
|
|
trigger.name
|
|
)
|
|
|
|
description = {
|
|
"description": (
|
|
"Workflow execution created by cron"
|
|
" trigger '(%s)'." % trigger.id
|
|
),
|
|
"triggered_by": {
|
|
"type": "cron_trigger",
|
|
"id": trigger.id,
|
|
"name": trigger.name,
|
|
}
|
|
}
|
|
|
|
rpc.get_engine_client().start_workflow(
|
|
trigger.workflow.name,
|
|
trigger.workflow.namespace,
|
|
None,
|
|
trigger.workflow_input,
|
|
description=json.dumps(description),
|
|
**trigger.workflow_params
|
|
)
|
|
except Exception:
|
|
# Log and continue to next cron trigger.
|
|
LOG.exception(
|
|
"Failed to process cron trigger %s",
|
|
str(trigger)
|
|
)
|
|
finally:
|
|
auth_ctx.set_ctx(None)
|
|
|
|
|
|
def advance_cron_trigger(t):
|
|
modified_count = 0
|
|
|
|
try:
|
|
# If the cron trigger is defined with limited execution count.
|
|
if t.remaining_executions is not None and t.remaining_executions > 0:
|
|
t.remaining_executions -= 1
|
|
|
|
# If this is the last execution.
|
|
if t.remaining_executions == 0:
|
|
modified_count = triggers.delete_cron_trigger(
|
|
t.name,
|
|
trust_id=t.trust_id,
|
|
delete_trust=False
|
|
)
|
|
else: # if remaining execution = None or > 0.
|
|
next_time = triggers.get_next_execution_time(
|
|
t.pattern,
|
|
t.next_execution_time
|
|
)
|
|
|
|
# Update the cron trigger with next execution details
|
|
# only if it wasn't already updated by a different process.
|
|
updated, modified_count = db_api_v2.update_cron_trigger(
|
|
t.name,
|
|
{
|
|
'next_execution_time': next_time,
|
|
'remaining_executions': t.remaining_executions
|
|
},
|
|
query_filter={
|
|
'next_execution_time': t.next_execution_time
|
|
}
|
|
)
|
|
except exc.DBEntityNotFoundError as e:
|
|
# Cron trigger was probably already deleted by a different process.
|
|
LOG.debug(
|
|
"Cron trigger named '%s' does not exist anymore: %s",
|
|
t.name, str(e)
|
|
)
|
|
|
|
# Return True if this engine was able to modify the cron trigger in DB.
|
|
return modified_count > 0
|
|
|
|
|
|
def setup():
|
|
tg = threadgroup.ThreadGroup()
|
|
pt = MistralPeriodicTasks(CONF)
|
|
|
|
ctx = auth_ctx.MistralContext(
|
|
user=None,
|
|
tenant=None,
|
|
auth_token=None,
|
|
is_admin=True
|
|
)
|
|
|
|
tg.add_dynamic_timer(
|
|
pt.run_periodic_tasks,
|
|
initial_delay=None,
|
|
periodic_interval_max=1,
|
|
context=ctx
|
|
)
|
|
|
|
_periodic_tasks[pt] = tg
|
|
|
|
return tg
|
|
|
|
|
|
def stop_all_periodic_tasks():
|
|
for tg in _periodic_tasks.values():
|
|
tg.stop()
|
|
|
|
_periodic_tasks.clear()
|