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Add stress test for Metaclient leader election (#2574)
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87 changes: 87 additions & 0 deletions
87
...src/test/java/org/apache/helix/metaclient/recipes/leaderelection/LeaderElectionPuppy.java
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| package org.apache.helix.metaclient.recipes.leaderelection; | ||
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) 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. | ||
| */ | ||
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| import java.util.Random; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.apache.helix.metaclient.MetaClientTestUtil; | ||
| import org.apache.helix.metaclient.api.MetaClientInterface; | ||
| import org.apache.helix.metaclient.exception.MetaClientException; | ||
| import org.apache.helix.metaclient.puppy.AbstractPuppy; | ||
| import org.apache.helix.metaclient.puppy.PuppySpec; | ||
| import org.testng.Assert; | ||
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| public class LeaderElectionPuppy extends AbstractPuppy { | ||
| String _leaderGroup; | ||
| String _participant; | ||
| private final Random _random; | ||
| LeaderElectionClient _leaderElectionClient; | ||
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| public LeaderElectionPuppy(MetaClientInterface<String> metaclient, PuppySpec puppySpec) { | ||
| super(metaclient, puppySpec); | ||
| _random = new Random(); | ||
| } | ||
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| public LeaderElectionPuppy(LeaderElectionClient leaderElectionClient, PuppySpec puppySpec, String leaderGroup, | ||
| String participant) { | ||
| super(leaderElectionClient.getMetaClient(), puppySpec); | ||
| _leaderElectionClient = leaderElectionClient; | ||
| _leaderGroup = leaderGroup; | ||
| _random = new Random(); | ||
| _participant = participant; | ||
| } | ||
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| @Override | ||
| protected void bark() throws Exception { | ||
| int randomNumber = _random.nextInt((int) TimeUnit.SECONDS.toMillis(5)); | ||
| System.out.println("LeaderElectionPuppy " + _participant + " Joining"); | ||
| _leaderElectionClient.joinLeaderElectionParticipantPool(_leaderGroup); | ||
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| Assert.assertTrue(MetaClientTestUtil.verify(() -> { | ||
| return (_leaderElectionClient.getLeader(_leaderGroup) != null); | ||
| }, MetaClientTestUtil.WAIT_DURATION)); | ||
| if (_random.nextBoolean()) { | ||
| _leaderElectionClient.relinquishLeader(_leaderGroup); | ||
| } | ||
| Assert.assertTrue(MetaClientTestUtil.verify(() -> { | ||
| return (_leaderElectionClient.getParticipantInfo(_leaderGroup, _participant) != null); | ||
| }, MetaClientTestUtil.WAIT_DURATION)); | ||
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| Thread.sleep(randomNumber); | ||
| System.out.println("LeaderElectionPuppy " + _participant + " Leaving"); | ||
| _leaderElectionClient.exitLeaderElectionParticipantPool(_leaderGroup); | ||
| Assert.assertTrue(MetaClientTestUtil.verify(() -> { | ||
| return (_leaderElectionClient.getParticipantInfo(_leaderGroup, _participant) == null); | ||
| }, MetaClientTestUtil.WAIT_DURATION)); | ||
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| Thread.sleep(randomNumber); | ||
| } | ||
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| @Override | ||
| protected void cleanup() { | ||
| try { | ||
| System.out.println("Cleaning - LeaderElectionPuppy " + _participant + " Leaving"); | ||
| _leaderElectionClient.exitLeaderElectionParticipantPool(_leaderGroup); | ||
| } catch (MetaClientException ignore) { | ||
| // already leave the pool. OK to throw exception. | ||
| } | ||
| } | ||
| } |
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