Merge "Cleanup zookeeper integration testing"

This commit is contained in:
Jenkins
2014-05-10 09:41:47 +00:00
committed by Gerrit Code Review
5 changed files with 379 additions and 370 deletions

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@@ -0,0 +1,273 @@
# -*- coding: utf-8 -*-
# Copyright (C) 2014 Yahoo! Inc. 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 mock
import threading
import time
from kazoo.recipe import watchers
from taskflow import exceptions as excp
from taskflow.openstack.common import uuidutils
from taskflow.persistence.backends import impl_dir
from taskflow import states
from taskflow.utils import misc
from taskflow.utils import persistence_utils as p_utils
@contextlib.contextmanager
def connect_close(*args):
try:
for a in args:
a.connect()
yield
finally:
for a in args:
a.close()
@contextlib.contextmanager
def flush(client, path=None):
# This uses the linearity guarantee of zookeeper (and associated libraries)
# to create a temporary node, wait until a watcher notifies it's created,
# then yield back for more work, and then at the end of that work delete
# the created node. This ensures that the operations done in the yield
# of this context manager will be applied and all watchers will have fired
# before this context manager exits.
if not path:
path = "/tmp-%s" % uuidutils.generate_uuid()
created = threading.Event()
deleted = threading.Event()
def on_created(data, stat):
if stat is not None:
created.set()
return False # cause this watcher to cease to exist
def on_deleted(data, stat):
if stat is None:
deleted.set()
return False # cause this watcher to cease to exist
watchers.DataWatch(client, path, func=on_created)
client.create(path)
created.wait()
try:
yield
finally:
watchers.DataWatch(client, path, func=on_deleted)
client.delete(path, recursive=True)
deleted.wait()
class BoardTestMixin(object):
def test_connect(self):
self.assertFalse(self.board.connected)
with connect_close(self.board):
self.assertTrue(self.board.connected)
@mock.patch("taskflow.jobs.backends.impl_zookeeper.misc."
"millis_to_datetime")
def test_posting_dates(self, mock_dt):
epoch = misc.millis_to_datetime(0)
mock_dt.return_value = epoch
with connect_close(self.board):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(epoch, j.created_on)
self.assertEqual(epoch, j.last_modified)
self.assertTrue(mock_dt.called)
def test_board_iter(self):
with connect_close(self.board):
it = self.board.iterjobs()
self.assertEqual(it.board, self.board)
self.assertFalse(it.only_unclaimed)
self.assertFalse(it.ensure_fresh)
def test_board_iter_empty(self):
with connect_close(self.board):
jobs_found = list(self.board.iterjobs())
self.assertEqual([], jobs_found)
def test_fresh_iter(self):
with connect_close(self.board):
book = p_utils.temporary_log_book()
self.board.post('test', book)
jobs = list(self.board.iterjobs(ensure_fresh=True))
self.assertEqual(1, len(jobs))
def test_wait_timeout(self):
with connect_close(self.board):
self.assertRaises(excp.NotFound, self.board.wait, timeout=0.1)
def test_wait_arrival(self):
ev = threading.Event()
jobs = []
def poster(wait_post=0.2):
ev.wait() # wait until the waiter is active
time.sleep(wait_post)
self.board.post('test', p_utils.temporary_log_book())
def waiter():
ev.set()
it = self.board.wait()
jobs.extend(it)
with connect_close(self.board):
t1 = threading.Thread(target=poster)
t1.daemon = True
t1.start()
t2 = threading.Thread(target=waiter)
t2.daemon = True
t2.start()
for t in (t1, t2):
t.join()
self.assertEqual(1, len(jobs))
def test_posting_claim(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(1, self.board.job_count)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertEqual(states.UNCLAIMED, j.state)
with flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(self.board.name, self.board.find_owner(j))
self.assertEqual(states.CLAIMED, j.state)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
self.assertRaisesAttrAccess(excp.NotFound, j, 'state')
self.assertRaises(excp.NotFound,
self.board.consume, j, self.board.name)
def test_posting_claim_consume(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
with flush(self.client):
self.board.claim(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
with flush(self.client):
self.board.consume(j, self.board.name)
self.assertEqual(0, len(list(self.board.iterjobs())))
self.assertRaises(excp.NotFound,
self.board.consume, j, self.board.name)
def test_posting_claim_abandon(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
with flush(self.client):
self.board.claim(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
with flush(self.client):
self.board.abandon(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
def test_posting_claim_diff_owner(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
with flush(self.client):
self.board.claim(possible_jobs[0], self.board.name)
possible_jobs = list(self.board.iterjobs())
self.assertEqual(1, len(possible_jobs))
self.assertRaises(excp.UnclaimableJob, self.board.claim,
possible_jobs[0], self.board.name + "-1")
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
def test_posting_no_post(self):
with connect_close(self.board):
with mock.patch.object(self.client, 'create') as create_func:
create_func.side_effect = IOError("Unable to post")
self.assertRaises(IOError, self.board.post,
'test', p_utils.temporary_log_book())
self.assertEqual(0, self.board.job_count)
def test_posting_with_book(self):
backend = impl_dir.DirBackend(conf={
'path': self.makeTmpDir(),
})
backend.get_connection().upgrade()
book, flow_detail = p_utils.temporary_flow_detail(backend)
self.assertEqual(1, len(book))
client, board = self._create_board(persistence=backend)
self.addCleanup(board.close)
with connect_close(board):
with flush(client):
board.post('test', book)
possible_jobs = list(board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertEqual(1, len(j.book))
self.assertEqual(book.name, j.book.name)
self.assertEqual(book.uuid, j.book.uuid)
flow_details = list(j.book)
self.assertEqual(flow_detail.uuid, flow_details[0].uuid)
self.assertEqual(flow_detail.name, flow_details[0].name)
def test_posting_abandon_no_owner(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(1, self.board.job_count)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertRaises(excp.JobFailure, self.board.abandon, j, j.name)

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@@ -14,163 +14,83 @@
# License for the specific language governing permissions and limitations
# under the License.
import contextlib
import mock
import threading
import time
import six
from kazoo.recipe import watchers
from zake import fake_client
from zake import utils as zake_utils
from taskflow import exceptions as excp
from taskflow.jobs.backends import impl_zookeeper
from taskflow import states
from taskflow import test
from taskflow.openstack.common import jsonutils
from taskflow.openstack.common import uuidutils
from taskflow.persistence.backends import impl_dir
from taskflow.tests.unit.jobs import base
from taskflow.utils import misc
from taskflow.utils import persistence_utils as p_utils
@contextlib.contextmanager
def connect_close(*args):
try:
for a in args:
a.connect()
yield
finally:
for a in args:
a.close()
class ZakeJobboardTest(test.TestCase, base.BoardTestMixin):
def _create_board(self, client=None, persistence=None):
if not client:
client = fake_client.FakeClient()
board = impl_zookeeper.ZookeeperJobBoard('test-board', {},
client=client,
persistence=persistence)
return (client, board)
def create_board(client=None, persistence=None):
if not client:
client = fake_client.FakeClient()
board = impl_zookeeper.ZookeeperJobBoard('test-board', {},
client=client,
persistence=persistence)
return (client, board)
@contextlib.contextmanager
def flush(client, path=None):
# This uses the linearity guarantee of zookeeper (and associated libraries)
# to create a temporary node, wait until a watcher notifies it's created,
# then yield back for more work, and then at the end of that work delete
# the created node. This ensures that the operations done in the yield
# of this context manager will be applied and all watchers will have fired
# before this context manager exits.
if not path:
path = "/tmp-%s" % uuidutils.generate_uuid()
created = threading.Event()
deleted = threading.Event()
def on_created(data, stat):
if stat is not None:
created.set()
return False # cause this watcher to cease to exist
def on_deleted(data, stat):
if stat is None:
deleted.set()
return False # cause this watcher to cease to exist
watchers.DataWatch(client, path, func=on_created)
client.create(path)
created.wait()
try:
yield
finally:
watchers.DataWatch(client, path, func=on_deleted)
client.delete(path, recursive=True)
deleted.wait()
class TestZookeeperJobs(test.TestCase):
def setUp(self):
super(TestZookeeperJobs, self).setUp()
self.client, self.board = create_board()
super(ZakeJobboardTest, self).setUp()
self.client, self.board = self._create_board()
self.addCleanup(self.board.close)
self.bad_paths = [self.board.path]
self.bad_paths.extend(zake_utils.partition_path(self.board.path))
def test_connect(self):
self.assertFalse(self.board.connected)
with connect_close(self.board):
self.assertTrue(self.board.connected)
def test_posting_owner_lost(self):
@mock.patch("taskflow.jobs.backends.impl_zookeeper.misc."
"millis_to_datetime")
def test_posting_dates(self, mock_dt):
epoch = misc.millis_to_datetime(0)
mock_dt.return_value = epoch
with base.connect_close(self.board):
with base.flush(self.client):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(states.UNCLAIMED, j.state)
with base.flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(states.CLAIMED, j.state)
with connect_close(self.board):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(epoch, j.created_on)
self.assertEqual(epoch, j.last_modified)
# Forcefully delete the owner from the backend storage to make
# sure the job becomes unclaimed (this may happen if some admin
# manually deletes the lock).
paths = list(six.iteritems(self.client.storage.paths))
for (path, value) in paths:
if path in self.bad_paths:
continue
if path.endswith('lock'):
value['data'] = misc.binary_encode(jsonutils.dumps({}))
self.assertEqual(states.UNCLAIMED, j.state)
self.assertTrue(mock_dt.called)
def test_posting_state_lock_lost(self):
def test_board_iter(self):
with connect_close(self.board):
it = self.board.iterjobs()
self.assertEqual(it.board, self.board)
self.assertFalse(it.only_unclaimed)
self.assertFalse(it.ensure_fresh)
with base.connect_close(self.board):
with base.flush(self.client):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(states.UNCLAIMED, j.state)
with base.flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(states.CLAIMED, j.state)
def test_board_iter_empty(self):
with connect_close(self.board):
jobs_found = list(self.board.iterjobs())
self.assertEqual([], jobs_found)
def test_fresh_iter(self):
with connect_close(self.board):
book = p_utils.temporary_log_book()
self.board.post('test', book)
jobs = list(self.board.iterjobs(ensure_fresh=True))
self.assertEqual(1, len(jobs))
def test_wait_timeout(self):
with connect_close(self.board):
self.assertRaises(excp.NotFound, self.board.wait, timeout=0.1)
def test_wait_arrival(self):
ev = threading.Event()
jobs = []
def poster(wait_post=0.2):
ev.wait() # wait until the waiter is active
time.sleep(wait_post)
self.board.post('test', p_utils.temporary_log_book())
def waiter():
ev.set()
it = self.board.wait()
jobs.extend(it)
with connect_close(self.board):
t1 = threading.Thread(target=poster)
t1.daemon = True
t1.start()
t2 = threading.Thread(target=waiter)
t2.daemon = True
t2.start()
for t in (t1, t2):
t.join()
self.assertEqual(1, len(jobs))
# Forcefully delete the lock from the backend storage to make
# sure the job becomes unclaimed (this may happen if some admin
# manually deletes the lock).
paths = list(six.iteritems(self.client.storage.paths))
for (path, value) in paths:
if path in self.bad_paths:
continue
if path.endswith("lock"):
self.client.storage.pop(path)
self.assertEqual(states.UNCLAIMED, j.state)
def test_posting_received_raw(self):
book = p_utils.temporary_log_book()
with connect_close(self.board):
with base.connect_close(self.board):
self.assertTrue(self.board.connected)
self.assertEqual(0, self.board.job_count)
posted_job = self.board.post('test', book)
@@ -201,175 +121,3 @@ class TestZookeeperJobs(test.TestCase):
},
'details': {},
}, jsonutils.loads(misc.binary_decode(paths[path_key]['data'])))
def test_posting_claim(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(1, self.board.job_count)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertEqual(states.UNCLAIMED, j.state)
with flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(self.board.name, self.board.find_owner(j))
self.assertEqual(states.CLAIMED, j.state)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
self.assertRaisesAttrAccess(excp.NotFound, j, 'state')
self.assertRaises(excp.NotFound,
self.board.consume, j, self.board.name)
def test_posting_claim_consume(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
with flush(self.client):
self.board.claim(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
with flush(self.client):
self.board.consume(j, self.board.name)
self.assertEqual(0, len(list(self.board.iterjobs())))
self.assertRaises(excp.NotFound,
self.board.consume, j, self.board.name)
def test_posting_claim_abandon(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
with flush(self.client):
self.board.claim(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
with flush(self.client):
self.board.abandon(j, self.board.name)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
def test_posting_claim_diff_owner(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
with flush(self.client):
self.board.claim(possible_jobs[0], self.board.name)
possible_jobs = list(self.board.iterjobs())
self.assertEqual(1, len(possible_jobs))
self.assertRaises(excp.UnclaimableJob, self.board.claim,
possible_jobs[0], self.board.name + "-1")
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(0, len(possible_jobs))
def test_posting_state_lock_lost(self):
with connect_close(self.board):
with flush(self.client):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(states.UNCLAIMED, j.state)
with flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(states.CLAIMED, j.state)
# Forcefully delete the lock from the backend storage to make
# sure the job becomes unclaimed (this may happen if some admin
# manually deletes the lock).
paths = list(six.iteritems(self.client.storage.paths))
for (path, value) in paths:
if path in self.bad_paths:
continue
if path.endswith("lock"):
self.client.storage.pop(path)
self.assertEqual(states.UNCLAIMED, j.state)
def test_posting_no_post(self):
with connect_close(self.board):
with mock.patch.object(self.client, 'create') as create_func:
create_func.side_effect = IOError("Unable to post")
self.assertRaises(IOError, self.board.post,
'test', p_utils.temporary_log_book())
self.assertEqual(0, self.board.job_count)
def test_posting_owner_lost(self):
with connect_close(self.board):
with flush(self.client):
j = self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(states.UNCLAIMED, j.state)
with flush(self.client):
self.board.claim(j, self.board.name)
self.assertEqual(states.CLAIMED, j.state)
# Forcefully delete the owner from the backend storage to make
# sure the job becomes unclaimed (this may happen if some admin
# manually deletes the lock).
paths = list(six.iteritems(self.client.storage.paths))
for (path, value) in paths:
if path in self.bad_paths:
continue
if path.endswith('lock'):
value['data'] = misc.binary_encode(jsonutils.dumps({}))
self.assertEqual(states.UNCLAIMED, j.state)
def test_posting_with_book(self):
backend = impl_dir.DirBackend(conf={
'path': self.makeTmpDir(),
})
backend.get_connection().upgrade()
book, flow_detail = p_utils.temporary_flow_detail(backend)
self.assertEqual(1, len(book))
client, board = create_board(persistence=backend)
self.addCleanup(board.close)
with connect_close(board):
with flush(client):
board.post('test', book)
possible_jobs = list(board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertEqual(1, len(j.book))
self.assertEqual(book.name, j.book.name)
self.assertEqual(book.uuid, j.book.uuid)
flow_details = list(j.book)
self.assertEqual(flow_detail.uuid, flow_details[0].uuid)
self.assertEqual(flow_detail.name, flow_details[0].name)
def test_posting_abandon_no_owner(self):
with connect_close(self.board):
with flush(self.client):
self.board.post('test', p_utils.temporary_log_book())
self.assertEqual(1, self.board.job_count)
possible_jobs = list(self.board.iterjobs(only_unclaimed=True))
self.assertEqual(1, len(possible_jobs))
j = possible_jobs[0]
self.assertRaises(excp.JobFailure, self.board.abandon, j, j.name)

View File

@@ -1,45 +0,0 @@
# -*- coding: utf-8 -*-
# Copyright (C) 2014 AT&T Labs 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
from zake import fake_client
from taskflow.persistence import backends
from taskflow.persistence.backends import impl_zookeeper
from taskflow import test
from taskflow.tests.unit.persistence import base
class ZakePersistenceTest(test.TestCase, base.PersistenceTestMixin):
def _get_connection(self):
return self._backend.get_connection()
def setUp(self):
super(ZakePersistenceTest, self).setUp()
conf = {
"path": "/taskflow",
}
client = fake_client.FakeClient()
client.start()
self._backend = impl_zookeeper.ZkBackend(conf, client=client)
conn = self._backend.get_connection()
conn.upgrade()
def test_zk_persistence_entry_point(self):
conf = {'connection': 'zookeeper:'}
with contextlib.closing(backends.fetch(conf)) as be:
self.assertIsInstance(be, impl_zookeeper.ZkBackend)

View File

@@ -17,37 +17,18 @@
import contextlib
import testtools
from zake import fake_client
from taskflow.openstack.common import uuidutils
from taskflow.persistence import backends
from taskflow.persistence.backends import impl_zookeeper
from taskflow import test
from taskflow.tests.unit.persistence import base
from taskflow.utils import kazoo_utils
from taskflow.tests import utils as test_utils
TEST_CONFIG = {
'timeout': 1.0,
'hosts': ["localhost:2181"],
}
TEST_PATH_TPL = '/taskflow/persistence-test/%s'
def _zookeeper_available():
client = kazoo_utils.make_client(TEST_CONFIG)
try:
# NOTE(imelnikov): 3 seconds we should be enough for localhost
client.start(timeout=3)
zk_ver = client.server_version()
if zk_ver >= impl_zookeeper.MIN_ZK_VERSION:
return True
else:
return False
except Exception:
return False
finally:
kazoo_utils.finalize_client(client)
_ZOOKEEPER_AVAILABLE = _zookeeper_available()
_ZOOKEEPER_AVAILABLE = test_utils.zookeeper_available(
impl_zookeeper.MIN_ZK_VERSION)
@testtools.skipIf(not _ZOOKEEPER_AVAILABLE, 'zookeeper is not available')
@@ -61,7 +42,7 @@ class ZkPersistenceTest(test.TestCase, base.PersistenceTestMixin):
def setUp(self):
super(ZkPersistenceTest, self).setUp()
conf = TEST_CONFIG.copy()
conf = test_utils.ZK_TEST_CONFIG.copy()
# Create a unique path just for this test (so that we don't overwrite
# what other tests are doing).
conf['path'] = TEST_PATH_TPL % (uuidutils.generate_uuid())
@@ -74,3 +55,30 @@ class ZkPersistenceTest(test.TestCase, base.PersistenceTestMixin):
with contextlib.closing(self._get_connection()) as conn:
conn.upgrade()
self.addCleanup(self._clear_all)
def test_zk_persistence_entry_point(self):
conf = {'connection': 'zookeeper:'}
with contextlib.closing(backends.fetch(conf)) as be:
self.assertIsInstance(be, impl_zookeeper.ZkBackend)
@testtools.skipIf(_ZOOKEEPER_AVAILABLE, 'zookeeper is available')
class ZakePersistenceTest(test.TestCase, base.PersistenceTestMixin):
def _get_connection(self):
return self._backend.get_connection()
def setUp(self):
super(ZakePersistenceTest, self).setUp()
conf = {
"path": "/taskflow",
}
self.client = fake_client.FakeClient()
self.client.start()
self._backend = impl_zookeeper.ZkBackend(conf, client=self.client)
conn = self._backend.get_connection()
conn.upgrade()
def test_zk_persistence_entry_point(self):
conf = {'connection': 'zookeeper:'}
with contextlib.closing(backends.fetch(conf)) as be:
self.assertIsInstance(be, impl_zookeeper.ZkBackend)

View File

@@ -23,12 +23,18 @@ from taskflow import exceptions
from taskflow.persistence.backends import impl_memory
from taskflow import retry
from taskflow import task
from taskflow.utils import kazoo_utils
from taskflow.utils import misc
ARGS_KEY = '__args__'
KWARGS_KEY = '__kwargs__'
ORDER_KEY = '__order__'
ZK_TEST_CONFIG = {
'timeout': 1.0,
'hosts': ["localhost:2181"],
}
@contextlib.contextmanager
def wrap_all_failures():
@@ -44,6 +50,25 @@ def wrap_all_failures():
raise exceptions.WrappedFailure([misc.Failure()])
def zookeeper_available(min_version, timeout=3):
client = kazoo_utils.make_client(ZK_TEST_CONFIG.copy())
try:
# NOTE(imelnikov): 3 seconds we should be enough for localhost
client.start(timeout=float(timeout))
if min_version:
zk_ver = client.server_version()
if zk_ver >= min_version:
return True
else:
return False
else:
return True
except Exception:
return False
finally:
kazoo_utils.finalize_client(client)
class DummyTask(task.Task):
def execute(self, context, *args, **kwargs):