Spring Framework example source code file (LifecycleEventTests.java)

This example Spring Framework source code file (LifecycleEventTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

applicationcontext, applicationlistener, contextstartedevent, contextstartedevent, contextstoppedevent, lifecycle, lifecycleeventtests, lifecyclelistener, lifecyclelistener, lifecycletestbean, lifecycletestbean, staticapplicationcontext, staticapplicationcontext, testcase

The Spring Framework LifecycleEventTests.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * 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.
 */

package org.springframework.context.event;

import junit.framework.TestCase;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.Lifecycle;
import org.springframework.context.support.StaticApplicationContext;

/**
 * @author Mark Fisher
 * @author Juergen Hoeller
 */
public class LifecycleEventTests extends TestCase {

	public void testContextStartedEvent() {
		StaticApplicationContext context = new StaticApplicationContext();
		context.registerSingleton("lifecycle", LifecycleTestBean.class);
		context.registerSingleton("listener", LifecycleListener.class);
		context.refresh();
		LifecycleTestBean lifecycleBean = (LifecycleTestBean) context.getBean("lifecycle");
		LifecycleListener listener = (LifecycleListener) context.getBean("listener");
		assertFalse(lifecycleBean.isRunning());
		assertEquals(0, listener.getStartedCount());
		context.start();
		assertTrue(lifecycleBean.isRunning());
		assertEquals(1, listener.getStartedCount());
		assertSame(context, listener.getApplicationContext());
	}

	public void testContextStoppedEvent() {
		StaticApplicationContext context = new StaticApplicationContext();
		context.registerSingleton("lifecycle", LifecycleTestBean.class);
		context.registerSingleton("listener", LifecycleListener.class);
		context.refresh();
		LifecycleTestBean lifecycleBean = (LifecycleTestBean) context.getBean("lifecycle");
		LifecycleListener listener = (LifecycleListener) context.getBean("listener");
		assertFalse(lifecycleBean.isRunning());
		context.start();
		assertTrue(lifecycleBean.isRunning());
		assertEquals(0, listener.getStoppedCount());		
		context.stop();
		assertFalse(lifecycleBean.isRunning());
		assertEquals(1, listener.getStoppedCount());
		assertSame(context, listener.getApplicationContext());
	}


	private static class LifecycleListener implements ApplicationListener {

		private ApplicationContext context;

		private int startedCount;

		private int stoppedCount;

		public void onApplicationEvent(ApplicationEvent event) {
			if (event instanceof ContextStartedEvent) {
				this.context = ((ContextStartedEvent) event).getApplicationContext();
				this.startedCount++;
			}
			else if (event instanceof ContextStoppedEvent) {
				this.context = ((ContextStoppedEvent) event).getApplicationContext();
				this.stoppedCount++;
			}
		}

		public ApplicationContext getApplicationContext() {
			return this.context;
		}

		public int getStartedCount() {
			return this.startedCount;
		}

		public int getStoppedCount() {
			return this.stoppedCount;
		}
	}


	private static class LifecycleTestBean implements Lifecycle {

		private boolean running;

		public boolean isRunning() {
			return this.running;
		}

		public void start() {
			this.running = true;
		}

		public void stop() {
			this.running = false;
		}
	}

}