| /* |
| * 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.slider.server.services.workflow; |
| |
| import org.apache.hadoop.service.Service; |
| import org.apache.hadoop.service.ServiceStateChangeListener; |
| import org.junit.Assert; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| /** |
| * Wait for a service to stop |
| */ |
| public class EndOfServiceWaiter implements ServiceStateChangeListener { |
| |
| private final AtomicBoolean finished = new AtomicBoolean(false); |
| |
| public EndOfServiceWaiter(Service svc) { |
| svc.registerServiceListener(this); |
| } |
| |
| public synchronized void waitForServiceToStop(long timeout) throws |
| InterruptedException { |
| if (!finished.get()) { |
| wait(timeout); |
| } |
| Assert.assertTrue("Service did not finish in time period", |
| finished.get()); |
| } |
| |
| @Override |
| public synchronized void stateChanged(Service service) { |
| if (service.isInState(Service.STATE.STOPPED)) { |
| finished.set(true); |
| notify(); |
| } |
| } |
| |
| |
| } |