TestModuleEventListener.java

/*
 * Copyright 2013 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.xd.dirt.module;

import java.util.concurrent.BlockingDeque;
import java.util.concurrent.LinkedBlockingDeque;

import org.springframework.context.ApplicationListener;
import org.springframework.xd.dirt.event.AbstractModuleEvent;

/**
 * Listens for {@link AbstractModuleEvent}s that signal module deployment and undeployment and places the events on a
 * blocking queue. Add this class to a test application context to be informed on module events.
 * 
 * @author Jennifer Hickey
 */
public class TestModuleEventListener implements ApplicationListener<AbstractModuleEvent> {

	final BlockingDeque<AbstractModuleEvent> events = new LinkedBlockingDeque<AbstractModuleEvent>(99);

	@Override
	public void onApplicationEvent(AbstractModuleEvent event) {
		events.add(event);
	}

	public BlockingDeque<AbstractModuleEvent> getEvents() {
		return events;
	}
}