StandaloneHaServicesTest.java example

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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.
 */

package org.apache.flink.runtime.highavailability.nonha.standalone;

import org.apache.flink.api.common.JobID;
import org.apache.flink.runtime.highavailability.HighAvailabilityServices;
import org.apache.flink.runtime.leaderelection.LeaderContender;
import org.apache.flink.runtime.leaderelection.LeaderElectionService;
import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalListener;
import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalService;
import org.apache.flink.util.TestLogger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

/**
 * Tests for the {@link StandaloneHaServices}.
 */
public class StandaloneHaServicesTest extends TestLogger {

	private final String jobManagerAddress = "jobManager";
	private final String resourceManagerAddress = "resourceManager";

	private StandaloneHaServices standaloneHaServices;

	@Before
	public void setupTest() {

		standaloneHaServices = new StandaloneHaServices(resourceManagerAddress, jobManagerAddress);
	}

	@After
	public void teardownTest() throws Exception {
		if (standaloneHaServices != null) {
			standaloneHaServices.closeAndCleanupAllData();
			standaloneHaServices = null;
		}
	}

	/**
	 * Tests that the standalone leader election services return a fixed address and leader session
	 * id.
	 */
	@Test
	public void testLeaderElection() throws Exception {
		JobID jobId = new JobID();
		LeaderContender jmLeaderContender = mock(LeaderContender.class);
		LeaderContender rmLeaderContender = mock(LeaderContender.class);

		LeaderElectionService jmLeaderElectionService = standaloneHaServices.getJobManagerLeaderElectionService(jobId);
		LeaderElectionService rmLeaderElectionService = standaloneHaServices.getResourceManagerLeaderElectionService();

		jmLeaderElectionService.start(jmLeaderContender);
		rmLeaderElectionService.start(rmLeaderContender);

		verify(jmLeaderContender).grantLeadership(eq(HighAvailabilityServices.DEFAULT_LEADER_ID));
		verify(rmLeaderContender).grantLeadership(eq(HighAvailabilityServices.DEFAULT_LEADER_ID));
	}

	/**
	 * Tests that the standalone leader retrieval services return the specified address and the
	 * fixed leader session id.
	 */
	@Test
	public void testJobManagerLeaderRetrieval() throws Exception {
		JobID jobId1 = new JobID();
		JobID jobId2 = new JobID();
		LeaderRetrievalListener jmListener1 = mock(LeaderRetrievalListener.class);
		LeaderRetrievalListener jmListener2 = mock(LeaderRetrievalListener.class);
		LeaderRetrievalListener rmListener = mock(LeaderRetrievalListener.class);

		LeaderRetrievalService jmLeaderRetrievalService1 = standaloneHaServices.getJobManagerLeaderRetriever(jobId1);
		LeaderRetrievalService jmLeaderRetrievalService2 = standaloneHaServices.getJobManagerLeaderRetriever(jobId2);
		LeaderRetrievalService rmLeaderRetrievalService = standaloneHaServices.getResourceManagerLeaderRetriever();

		jmLeaderRetrievalService1.start(jmListener1);
		jmLeaderRetrievalService2.start(jmListener2);
		rmLeaderRetrievalService.start(rmListener);

		verify(jmListener1).notifyLeaderAddress(eq(jobManagerAddress), eq(HighAvailabilityServices.DEFAULT_LEADER_ID));
		verify(jmListener2).notifyLeaderAddress(eq(jobManagerAddress), eq(HighAvailabilityServices.DEFAULT_LEADER_ID));
		verify(rmListener).notifyLeaderAddress(eq(resourceManagerAddress), eq(HighAvailabilityServices.DEFAULT_LEADER_ID));
	}
}