JmsSource.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.test.fixtures;

import org.apache.activemq.ActiveMQConnectionFactory;

import org.springframework.jms.core.JmsTemplate;
import org.springframework.util.Assert;
import org.springframework.xd.test.fixtures.util.AvailableSocketPorts;


/**
 * A test fixture that allows testing of the 'jms' source module.
 *
 * @author Glenn Renfro
 */
public class JmsSource extends AbstractModuleFixture<JmsSource> {

	public static final int DEFAULT_PORT = 61616;

	protected int port;

	private String host;


	public JmsSource(String host, int port) {
		Assert.hasText(host, "host must not be empty nor null");

		this.host = host;
		this.port = port;
	}

	/**
	 * Generates a JmsSource instance using the default port 61616
	 *
	 * @param host The host machine where the JMS broker exists.
	 * @return a fuly qualified JmsSource fixture instance.
	 */
	public static JmsSource withDefaultPort(String host) {
		Assert.hasText(host, "host must not be empty nor null");

		return new JmsSource(host, DEFAULT_PORT);
	}

	/**
	 * Renders the DSL for this fixture.
	 */
	@Override
	protected String toDSL() {
		return "jms ";
	}

	/**
	 * Ensure that the Jms broker socket is available by polling it for up to 2 seconds
	 * 
	 * @return JmsSource to use in fluent API chaining
	 * @throws IllegalStateException if can not connect in 2 seconds.
	 */
	public JmsSource ensureReady() {
		AvailableSocketPorts.ensureReady(this.getClass().getName(), host, port, 2000);
		return this;
	}


	/**
	 * Sends data to the JMS broker via TCP.
	 *
	 * @param data A string containing the data to send to the JMS broker.
	 */
	public void sendData(String data) {
		Assert.hasText(data, "data must not be empty nor null");

		JmsTemplate template = new JmsTemplate(new ActiveMQConnectionFactory("tcp://" + host + ":" + port));
		template.convertAndSend("ec2Test3", data);
	}

}