| /** |
| * 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.hadoop.mapred; |
| |
| import java.io.IOException; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig; |
| import org.apache.hadoop.util.ServicePlugin; |
| import org.junit.Test; |
| |
| public class TestJobTrackerPlugins extends TestCase { |
| |
| static class FakeServicePlugin implements ServicePlugin { |
| |
| private static FakeServicePlugin instance; |
| |
| public static FakeServicePlugin getInstance() { |
| return instance; |
| } |
| |
| private Object service; |
| private boolean stopped; |
| |
| public Object getService() { |
| return service; |
| } |
| |
| public boolean isStopped() { |
| return stopped; |
| } |
| |
| public FakeServicePlugin() { |
| // store static reference to instance so we can retrieve it in the test |
| instance = this; |
| } |
| |
| @Override |
| public void start(Object service) { |
| this.service = service; |
| } |
| |
| @Override |
| public void stop() { |
| stopped = true; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| } |
| |
| @Test |
| public void test() throws Exception { |
| JobConf conf = new JobConf(); |
| conf.set(JTConfig.JT_IPC_ADDRESS, "localhost:0"); |
| conf.set(JTConfig.JT_HTTP_ADDRESS, "0.0.0.0:0"); |
| conf.setClass(JTConfig.JT_PLUGINS, FakeServicePlugin.class, |
| ServicePlugin.class); |
| |
| assertNull("Plugin not created", FakeServicePlugin.getInstance()); |
| |
| JobTracker jobTracker = JobTracker.startTracker(conf); |
| assertNotNull("Plugin created", FakeServicePlugin.getInstance()); |
| assertSame("Service is jobTracker", |
| FakeServicePlugin.getInstance().getService(), jobTracker); |
| assertFalse("Plugin not stopped", |
| FakeServicePlugin.getInstance().isStopped()); |
| |
| jobTracker.close(); |
| assertTrue("Plugin stopped", FakeServicePlugin.getInstance().isStopped()); |
| } |
| |
| } |