Querier._query_and_save_results() - Code Metrics - Inspection of "Implement pause and resume for Mistral runner" - StackStorm/st2 - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#3507)

by W

created 2017-06-23 00:06 UTC

Querier._query_and_save_results() D

↳ Parent: Querier

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	8
dl	0
loc	40
rs	4
c	0
b	0
f	0

# Licensed to the StackStorm, Inc ('StackStorm') under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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 abc
import eventlet
import Queue
import six
import time

from oslo_config import cfg

from st2actions.container.service import RunnerContainerService
from st2common import log as logging
from st2common.constants import action as action_constants
from st2common.persistence.executionstate import ActionExecutionState
from st2common.persistence.liveaction import LiveAction
from st2common.runners import utils as runners_utils
from st2common.services import executions
from st2common.util import date as date_utils

LOG = logging.getLogger(__name__)

__all__ = [
    'Querier',
    'QueryContext'
]


@six.add_metaclass(abc.ABCMeta)
class Querier(object):
    delete_state_object_on_error = True

    def __init__(self, empty_q_sleep_time=5,
                 no_workers_sleep_time=1, container_service=None):
        self._query_thread_pool_size = cfg.CONF.results_tracker.thread_pool_size
        self._query_interval = cfg.CONF.results_tracker.query_interval
        self._query_contexts = Queue.Queue()
        self._thread_pool = eventlet.GreenPool(self._query_thread_pool_size)
        self._empty_q_sleep_time = empty_q_sleep_time
        self._no_workers_sleep_time = no_workers_sleep_time
        if not container_service:
            container_service = RunnerContainerService()
        self.container_service = container_service
        self._started = False

    def start(self):
        self._started = True
        while True:
            while self._query_contexts.empty():
                eventlet.greenthread.sleep(self._empty_q_sleep_time)
            while self._thread_pool.free() <= 0:
                eventlet.greenthread.sleep(self._no_workers_sleep_time)
            self._fire_queries()
            eventlet.sleep(self._query_interval)

    def add_queries(self, query_contexts=None):
        if query_contexts is None:
            query_contexts = []
        LOG.debug('Adding queries to querier: %s' % query_contexts)

        for query_context in query_contexts:
            self._query_contexts.put((time.time(), query_context))

    def is_started(self):
        return self._started

    def _fire_queries(self):
        if self._thread_pool.free() <= 0:
            return

        now = time.time()
        reschedule_queries = []

        while not self._query_contexts.empty() and self._thread_pool.free() > 0:
            (last_query_time, query_context) = self._query_contexts.get_nowait()
            if now - last_query_time < self._query_interval:
                reschedule_queries.append((last_query_time, query_context))
                continue
            else:
                self._thread_pool.spawn(
                    self._query_and_save_results,
                    query_context,
                    last_query_time
                )

        for query in reschedule_queries:
            self._query_contexts.put((query[0], query[1]))

    def _query_and_save_results(self, query_context, last_query_time=None):
        this_query_time = time.time()
        execution_id = query_context.execution_id
        actual_query_context = query_context.query_context

        LOG.debug('Querying external service for results. Context: %s' % actual_query_context)

        try:
            (status, results) = self.query(
                execution_id,
                actual_query_context,
                last_query_time=last_query_time
            )
        except:
            LOG.exception('Failed querying results for liveaction_id %s.', execution_id)
            if self.delete_state_object_on_error:
                self._delete_state_object(query_context)
                LOG.debug('Removed state object %s.', query_context)
            return

        liveaction_db = None
        try:
            liveaction_db = self._update_action_results(execution_id, status, results)
        except Exception:
            LOG.exception('Failed updating action results for liveaction_id %s', execution_id)
            if self.delete_state_object_on_error:
                self._delete_state_object(query_context)
                LOG.debug('Removed state object %s.', query_context)
            return

        if (status in action_constants.LIVEACTION_COMPLETED_STATES or
                status == action_constants.LIVEACTION_STATUS_PAUSED):

            if status != action_constants.LIVEACTION_STATUS_CANCELED:
                runners_utils.invoke_post_run(liveaction_db)

            self._delete_state_object(query_context)

            return

        self._query_contexts.put((this_query_time, query_context))

    def _update_action_results(self, execution_id, status, results):
        liveaction_db = LiveAction.get_by_id(execution_id)
        if not liveaction_db:
            raise Exception('No DB model for liveaction_id: %s' % execution_id)

        if liveaction_db.status != action_constants.LIVEACTION_STATUS_CANCELED:
            liveaction_db.status = status

        liveaction_db.result = results

        # Action has completed, record end_timestamp
        if (liveaction_db.status in action_constants.LIVEACTION_COMPLETED_STATES and
                not liveaction_db.end_timestamp):
            liveaction_db.end_timestamp = date_utils.get_datetime_utc_now()

        # update liveaction, update actionexecution and then publish update.
        updated_liveaction = LiveAction.add_or_update(liveaction_db, publish=False)
        executions.update_execution(updated_liveaction)
        LiveAction.publish_update(updated_liveaction)

        return updated_liveaction

    def _delete_state_object(self, query_context):
        state_db = ActionExecutionState.get_by_id(query_context.id)
        if state_db is not None:
            try:
                LOG.info('Clearing state object: %s', state_db)
                ActionExecutionState.delete(state_db)
            except:
                LOG.exception('Failed clearing state object: %s', state_db)

    def query(self, execution_id, query_context, last_query_time=None):
        """
        This is the method individual queriers must implement.
        This method should return a tuple of (status, results).

        status should be one of LIVEACTION_STATUS_SUCCEEDED, LIVEACTION_STATUS_RUNNING,
        LIVEACTION_STATUS_FAILED defined in st2common.constants.action.
        """
        pass

    def print_stats(self):
        LOG.info('\t --- Name: %s, pending queuries: %d', self.__class__.__name__,
                 self._query_contexts.qsize())


class QueryContext(object):
    def __init__(self, obj_id, execution_id, query_context, query_module):
        self.id = obj_id
        self.execution_id = execution_id
        self.query_context = query_context
        self.query_module = query_module

    @classmethod
    def from_model(cls, model):
        return QueryContext(str(model.id), str(model.execution_id), model.query_context,
                            model.query_module)

    def __repr__(self):
        return ('<QueryContext id=%s,execution_id=%s,query_context=%s>' %
                (self.id, self.execution_id, self.query_context))


1			# Licensed to the StackStorm, Inc ('StackStorm') under one or more
2			# contributor license agreements. See the NOTICE file distributed with
3			# this work for additional information regarding copyright ownership.
4			# The ASF licenses this file to You under the Apache License, Version 2.0
5			# (the "License"); you may not use this file except in compliance with
6			# the License. You may obtain a copy of the License at
7			#
8			# http://www.apache.org/licenses/LICENSE-2.0
9			#
10			# Unless required by applicable law or agreed to in writing, software
11			# distributed under the License is distributed on an "AS IS" BASIS,
12			# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13			# See the License for the specific language governing permissions and
14			# limitations under the License.
15
16			import abc
17			import eventlet
18			import Queue
19			import six
20			import time
21
22			from oslo_config import cfg
23
24			from st2actions.container.service import RunnerContainerService
25			from st2common import log as logging
26			from st2common.constants import action as action_constants
27			from st2common.persistence.executionstate import ActionExecutionState
28			from st2common.persistence.liveaction import LiveAction
29			from st2common.runners import utils as runners_utils
30			from st2common.services import executions
31			from st2common.util import date as date_utils
32
33			LOG = logging.getLogger(__name__)
34
35			__all__ = [
36			'Querier',
37			'QueryContext'
38			]
39
40
41			@six.add_metaclass(abc.ABCMeta)
42			class Querier(object):
43			delete_state_object_on_error = True
44
45			def __init__(self, empty_q_sleep_time=5,
46			no_workers_sleep_time=1, container_service=None):
47			self._query_thread_pool_size = cfg.CONF.results_tracker.thread_pool_size
48			self._query_interval = cfg.CONF.results_tracker.query_interval
49			self._query_contexts = Queue.Queue()
50			self._thread_pool = eventlet.GreenPool(self._query_thread_pool_size)
51			self._empty_q_sleep_time = empty_q_sleep_time
52			self._no_workers_sleep_time = no_workers_sleep_time
53			if not container_service:
54			container_service = RunnerContainerService()
55			self.container_service = container_service
56			self._started = False
57
58			def start(self):
59			self._started = True
60			while True:
61			while self._query_contexts.empty():
62			eventlet.greenthread.sleep(self._empty_q_sleep_time)
63			while self._thread_pool.free() <= 0:
64			eventlet.greenthread.sleep(self._no_workers_sleep_time)
65			self._fire_queries()
66			eventlet.sleep(self._query_interval)
67
68			def add_queries(self, query_contexts=None):
69			if query_contexts is None:
70			query_contexts = []
71			LOG.debug('Adding queries to querier: %s' % query_contexts)
			0 ignored issues – show Coding Style Best Practice introduced 2016-09-23 16:34 UTC by Report Bug Copy Issue Report Specify string format arguments as logging function parameters Loading history...
72			for query_context in query_contexts:
73			self._query_contexts.put((time.time(), query_context))
74
75			def is_started(self):
76			return self._started
77
78			def _fire_queries(self):
79			if self._thread_pool.free() <= 0:
80			return
81
82			now = time.time()
83			reschedule_queries = []
84
85			while not self._query_contexts.empty() and self._thread_pool.free() > 0:
86			(last_query_time, query_context) = self._query_contexts.get_nowait()
87			if now - last_query_time < self._query_interval:
88			reschedule_queries.append((last_query_time, query_context))
89			continue
90			else:
91			self._thread_pool.spawn(
92			self._query_and_save_results,
93			query_context,
94			last_query_time
95			)
96
97			for query in reschedule_queries:
98			self._query_contexts.put((query[0], query[1]))
99
100			def _query_and_save_results(self, query_context, last_query_time=None):
101			this_query_time = time.time()
102			execution_id = query_context.execution_id
103			actual_query_context = query_context.query_context
104
105			LOG.debug('Querying external service for results. Context: %s' % actual_query_context)
			0 ignored issues – show Coding Style Best Practice introduced 2016-09-23 16:34 UTC by Report Bug Copy Issue Report Specify string format arguments as logging function parameters Loading history...
106			try:
107			(status, results) = self.query(
108			execution_id,
109			actual_query_context,
110			last_query_time=last_query_time
111			)
112			except:
113			LOG.exception('Failed querying results for liveaction_id %s.', execution_id)
114			if self.delete_state_object_on_error:
115			self._delete_state_object(query_context)
116			LOG.debug('Removed state object %s.', query_context)
117			return
118
119			liveaction_db = None
120			try:
121			liveaction_db = self._update_action_results(execution_id, status, results)
122			except Exception:
123			LOG.exception('Failed updating action results for liveaction_id %s', execution_id)
124			if self.delete_state_object_on_error:
125			self._delete_state_object(query_context)
126			LOG.debug('Removed state object %s.', query_context)
127			return
128
129			if (status in action_constants.LIVEACTION_COMPLETED_STATES or
130			status == action_constants.LIVEACTION_STATUS_PAUSED):
131
132			if status != action_constants.LIVEACTION_STATUS_CANCELED:
133			runners_utils.invoke_post_run(liveaction_db)
134
135			self._delete_state_object(query_context)
136
137			return
138
139			self._query_contexts.put((this_query_time, query_context))
140
141			def _update_action_results(self, execution_id, status, results):
142			liveaction_db = LiveAction.get_by_id(execution_id)
143			if not liveaction_db:
144			raise Exception('No DB model for liveaction_id: %s' % execution_id)
145
146			if liveaction_db.status != action_constants.LIVEACTION_STATUS_CANCELED:
147			liveaction_db.status = status
148
149			liveaction_db.result = results
150
151			# Action has completed, record end_timestamp
152			if (liveaction_db.status in action_constants.LIVEACTION_COMPLETED_STATES and
153			not liveaction_db.end_timestamp):
154			liveaction_db.end_timestamp = date_utils.get_datetime_utc_now()
155
156			# update liveaction, update actionexecution and then publish update.
157			updated_liveaction = LiveAction.add_or_update(liveaction_db, publish=False)
158			executions.update_execution(updated_liveaction)
159			LiveAction.publish_update(updated_liveaction)
160
161			return updated_liveaction
162
163			def _delete_state_object(self, query_context):
164			state_db = ActionExecutionState.get_by_id(query_context.id)
165			if state_db is not None:
166			try:
167			LOG.info('Clearing state object: %s', state_db)
168			ActionExecutionState.delete(state_db)
169			except:
170			LOG.exception('Failed clearing state object: %s', state_db)
171
172			def query(self, execution_id, query_context, last_query_time=None):
173			"""
174			This is the method individual queriers must implement.
175			This method should return a tuple of (status, results).
176
177			status should be one of LIVEACTION_STATUS_SUCCEEDED, LIVEACTION_STATUS_RUNNING,
178			LIVEACTION_STATUS_FAILED defined in st2common.constants.action.
179			"""
180			pass
181
182			def print_stats(self):
183			LOG.info('\t --- Name: %s, pending queuries: %d', self.__class__.__name__,
184			self._query_contexts.qsize())
185
186
187			class QueryContext(object):
188			def __init__(self, obj_id, execution_id, query_context, query_module):
189			self.id = obj_id
190			self.execution_id = execution_id
191			self.query_context = query_context
192			self.query_module = query_module
193
194			@classmethod
195			def from_model(cls, model):
196			return QueryContext(str(model.id), str(model.execution_id), model.query_context,
197			model.query_module)
198
199			def __repr__(self):
200			return ('<QueryContext id=%s,execution_id=%s,query_context=%s>' %
201			(self.id, self.execution_id, self.query_context))
202

StackStorm / st2

Pull Request — master (#3507)

Querier._query_and_save_results() D

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Duplication

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