# -*- coding: utf-8 -*- # # Copyright (C) 2013 eNovance 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 threading import time import uuid import testscenarios from testtools import testcase import tooz.coordination from tooz import tests from zake import fake_storage # Real ZooKeeper server scenario zookeeper_tests = ('zookeeper_tests', {'backend': 'kazoo', 'kwargs': {'hosts': '127.0.0.1:2181'}}) # Fake Kazoo client scenario fake_storage = fake_storage.FakeStorage(threading.RLock()) fake_zookeeper_tests = ('fake_zookeeper_tests', {'backend': 'zake', 'kwargs': {'storage': fake_storage}}) class TestAPI(testscenarios.TestWithScenarios, tests.TestCaseSkipNotImplemented): scenarios = [ zookeeper_tests, fake_zookeeper_tests, ('memcached', {'backend': 'memcached', 'kwargs': {'membership_timeout': 5}}), ] def setUp(self): super(TestAPI, self).setUp() self.group_id = self._get_random_uuid() self.member_id = self._get_random_uuid() self._coord = tooz.coordination.get_coordinator(self.backend, self.member_id, **self.kwargs) try: self._coord.start(timeout=5) except tooz.coordination.ToozConnectionError as e: raise testcase.TestSkipped(str(e)) def tearDown(self): self._coord.stop() super(TestAPI, self).tearDown() def test_create_group(self): self._coord.create_group(self.group_id).get() all_group_ids = self._coord.get_groups().get() self.assertTrue(self.group_id in all_group_ids) def test_create_group_already_exist(self): self._coord.create_group(self.group_id).get() create_group = self._coord.create_group(self.group_id) self.assertRaises(tooz.coordination.GroupAlreadyExist, create_group.get) def test_get_groups(self): groups_ids = [self._get_random_uuid() for _ in range(0, 5)] for group_id in groups_ids: self._coord.create_group(group_id).get() created_groups = self._coord.get_groups().get() for group_id in groups_ids: self.assertTrue(group_id in created_groups) def test_join_group(self): self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id).get() member_list = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in member_list) def test_join_nonexistent_group(self): group_id_test = self._get_random_uuid() join_group = self._coord.join_group(group_id_test) self.assertRaises(tooz.coordination.GroupNotCreated, join_group.get) def test_join_group_with_member_id_already_exists(self): self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id).get() client = tooz.coordination.get_coordinator(self.backend, self.member_id, **self.kwargs) client.start() join_group = client.join_group(self.group_id) self.assertRaises(tooz.coordination.MemberAlreadyExist, join_group.get) def test_leave_group(self): self._coord.create_group(self.group_id).get() all_group_ids = self._coord.get_groups().get() self.assertTrue(self.group_id in all_group_ids) self._coord.join_group(self.group_id).get() member_list = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in member_list) member_ids = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in member_ids) self._coord.leave_group(self.group_id).get() new_member_objects = self._coord.get_members(self.group_id).get() new_member_list = [member.member_id for member in new_member_objects] self.assertTrue(self.member_id not in new_member_list) def test_leave_nonexistent_group(self): all_group_ids = self._coord.get_groups().get() self.assertTrue(self.group_id not in all_group_ids) leave_group = self._coord.leave_group(self.group_id) try: leave_group.get() # Drivers raise one of those depending on their capability except (tooz.coordination.MemberNotJoined, tooz.coordination.GroupNotCreated): pass else: self.fail("Exception not raised") def test_leave_group_not_joined_by_member(self): self._coord.create_group(self.group_id).get() all_group_ids = self._coord.get_groups().get() self.assertTrue(self.group_id in all_group_ids) leave_group = self._coord.leave_group(self.group_id) self.assertRaises(tooz.coordination.MemberNotJoined, leave_group.get) def test_get_members(self): group_id_test2 = self._get_random_uuid() member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() self._coord.create_group(group_id_test2).get() self._coord.join_group(group_id_test2).get() client2.join_group(group_id_test2).get() members_ids = self._coord.get_members(group_id_test2).get() self.assertTrue(self.member_id in members_ids) self.assertTrue(member_id_test2 in members_ids) def test_get_member_capabilities(self): self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id, b"test_capabilities") capa = self._coord.get_member_capabilities(self.group_id, self.member_id).get() self.assertEqual(capa, b"test_capabilities") def test_get_member_capabilities_nonexistent_group(self): capa = self._coord.get_member_capabilities(self.group_id, self.member_id) try: capa.get() # Drivers raise one of those depending on their capability except (tooz.coordination.MemberNotJoined, tooz.coordination.GroupNotCreated): pass else: self.fail("Exception not raised") def test_get_member_capabilities_nonjoined_member(self): self._coord.create_group(self.group_id).get() capa = self._coord.get_member_capabilities(self.group_id, self.member_id) self.assertRaises(tooz.coordination.MemberNotJoined, capa.get) def test_update_capabilities(self): self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id, b"test_capabilities1").get() capa = self._coord.get_member_capabilities(self.group_id, self.member_id).get() self.assertEqual(capa, b"test_capabilities1") self._coord.update_capabilities(self.group_id, b"test_capabilities2").get() capa2 = self._coord.get_member_capabilities(self.group_id, self.member_id).get() self.assertEqual(capa2, b"test_capabilities2") def test_update_capabilities_with_group_id_nonexistent(self): update_cap = self._coord.update_capabilities(self.group_id, b'test_capabilities') try: update_cap.get() # Drivers raise one of those depending on their capability except (tooz.coordination.MemberNotJoined, tooz.coordination.GroupNotCreated): pass else: self.fail("Exception not raised") def test_heartbeat(self): self._coord.heartbeat() def test_disconnect_leave_group(self): if self.backend == 'zake': self.skipTest("Zake has a bug that prevent this test from working") member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id).get() client2.join_group(self.group_id).get() members_ids = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in members_ids) self.assertTrue(member_id_test2 in members_ids) client2.stop() members_ids = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in members_ids) self.assertTrue(member_id_test2 not in members_ids) def test_timeout(self): if self.backend != 'memcached': self.skipTest("This test only works with memcached for now") member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() self._coord.create_group(self.group_id).get() self._coord.join_group(self.group_id).get() client2.join_group(self.group_id).get() members_ids = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in members_ids) self.assertTrue(member_id_test2 in members_ids) time.sleep(3) self._coord.heartbeat() time.sleep(3) members_ids = self._coord.get_members(self.group_id).get() self.assertTrue(self.member_id in members_ids) self.assertTrue(member_id_test2 not in members_ids) def _set_event(self, event): self.event = event return 42 def test_watch_group_join(self): member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() self._coord.create_group(self.group_id).get() # Watch the group self._coord.watch_join_group(self.group_id, self._set_event) # Join the group client2.join_group(self.group_id).get() members_ids = self._coord.get_members(self.group_id).get() self.assertTrue(member_id_test2 in members_ids) while True: if self._coord.run_watchers(): break self.assertIsInstance(self.event, tooz.coordination.MemberJoinedGroup) self.assertEqual(member_id_test2, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) # Stop watching self._coord.unwatch_join_group(self.group_id, self._set_event) self.event = None # Leave and rejoin group client2.leave_group(self.group_id).get() client2.join_group(self.group_id).get() self._coord.run_watchers() self.assertIsNone(self.event) def test_watch_leave_group(self): member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() self._coord.create_group(self.group_id).get() # Watch the group: this can leads to race conditions in certain # driver that are not able to see all events, so we join, wait for # the join to be seen, and then we leave, and wait for the leave to # be seen. self._coord.watch_join_group(self.group_id, lambda children: True) self._coord.watch_leave_group(self.group_id, self._set_event) # Join and leave the group client2.join_group(self.group_id).get() # Consumes join event while True: if self._coord.run_watchers(): break client2.leave_group(self.group_id).get() # Consumes leave event while True: if self._coord.run_watchers(): break self.assertIsInstance(self.event, tooz.coordination.MemberLeftGroup) self.assertEqual(member_id_test2, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) # Stop watching self._coord.unwatch_leave_group(self.group_id, self._set_event) self.event = None # Rejoin and releave group client2.join_group(self.group_id).get() client2.leave_group(self.group_id).get() self._coord.run_watchers() self.assertIsNone(self.event) def test_watch_join_group_non_existent(self): self.assertRaises(tooz.coordination.GroupNotCreated, self._coord.watch_join_group, self.group_id, lambda: None) self.assertEqual(0, len(self._coord._hooks_join_group[self.group_id])) def test_watch_leave_group_non_existent(self): self.assertRaises(tooz.coordination.GroupNotCreated, self._coord.watch_leave_group, self.group_id, lambda: None) self.assertEqual(0, len(self._coord._hooks_leave_group[self.group_id])) def test_run_for_election(self): self._coord.create_group(self.group_id).get() self._coord.watch_elected_as_leader(self.group_id, self._set_event) self._coord.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(self.member_id, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) def test_run_for_election_multiple_clients(self): self._coord.create_group(self.group_id).get() self._coord.watch_elected_as_leader(self.group_id, self._set_event) self._coord.run_watchers() member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() client2.watch_elected_as_leader(self.group_id, self._set_event) client2.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(self.member_id, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) self.event = None self._coord.stop() client2.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(member_id_test2, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) def test_run_for_election_multiple_clients_stand_down(self): self._coord.create_group(self.group_id).get() self._coord.watch_elected_as_leader(self.group_id, self._set_event) self._coord.run_watchers() member_id_test2 = self._get_random_uuid() client2 = tooz.coordination.get_coordinator(self.backend, member_id_test2, **self.kwargs) client2.start() client2.watch_elected_as_leader(self.group_id, self._set_event) client2.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(self.member_id, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) self.event = None self._coord.stand_down_group_leader(self.group_id) client2.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(member_id_test2, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) self.event = None client2.stand_down_group_leader(self.group_id) self._coord.run_watchers() self.assertIsInstance(self.event, tooz.coordination.LeaderElected) self.assertEqual(self.member_id, self.event.member_id) self.assertEqual(self.group_id, self.event.group_id) @staticmethod def _get_random_uuid(): return str(uuid.uuid4()).encode('ascii') class TestHook(testcase.TestCase): def setUp(self): super(TestHook, self).setUp() self.hooks = tooz.coordination.Hooks() self.triggered = False def _trigger(self): self.triggered = True def test_register_hook(self): self.assertEqual(self.hooks.run(), []) self.assertFalse(self.triggered) self.hooks.append(self._trigger) self.assertEqual(self.hooks.run(), [None]) self.assertTrue(self.triggered) def test_unregister_hook(self): self.hooks.append(self._trigger) self.assertEqual(self.hooks.run(), [None]) self.assertTrue(self.triggered) self.triggered = False self.hooks.remove(self._trigger) self.assertEqual(self.hooks.run(), []) self.assertFalse(self.triggered)