DirectReplyTests.java

/*
 * Copyright 2015 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.amqp.rabbit.test;

import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.junit.Test;

import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.ChannelCallback;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter;

import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.AMQP.Queue.DeclareOk;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;

/**
 * @author Gary Russell
 * @since 1.5
 *
 */
public class DirectReplyTests {


	@Test
	public void testRaw() throws Exception {
		ConnectionFactory cf = new ConnectionFactory();
		cf.setHost("localhost");
		Connection conn = cf.newConnection();
		Channel channel1 = conn.createChannel();
		class MyConsumer extends DefaultConsumer {

			private int i;

			public MyConsumer(Channel channel) {
				super(channel);
			}

			@Override
			public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) {
				try {
					String replyTo = properties.getReplyTo();
//					System.out.println(++i + " " + replyTo);
					getChannel().basicPublish("", replyTo, properties, ("reply" + i).getBytes());
				}
				catch (IOException e) {
					e.printStackTrace();
				}
			}

		}
		DeclareOk declareOk = channel1.queueDeclare();
		MyConsumer consumer = new MyConsumer(channel1);
		channel1.basicConsume(declareOk.getQueue(), true, consumer);

		Channel channel2 = conn.createChannel();
		BasicProperties props = new BasicProperties.Builder().replyTo("amq.rabbitmq.reply-to").build();
		for (int i = 0; i < 100000; i++) {
			final CountDownLatch latch = new CountDownLatch(1);
			String tag = channel2.basicConsume("amq.rabbitmq.reply-to", true, new DefaultConsumer(channel2) {

				@Override
				public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties,
						byte[] body) throws IOException {
					latch.countDown();
				}

			});
			channel2.basicPublish("", declareOk.getQueue(), props, "request".getBytes());
			assertTrue(latch.await(10, TimeUnit.SECONDS));
			channel2.basicCancel(tag);
		}
	}

	@Test
	public void testWithSpring() throws Exception {
		CachingConnectionFactory cf = new CachingConnectionFactory("localhost");
		SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(cf);
		Channel channel = cf.createConnection().createChannel(false);
		final DeclareOk declareOk = channel.queueDeclare();
		channel.close();
		container.setQueueNames(declareOk.getQueue());
		MessageListenerAdapter mla = new MessageListenerAdapter(new Object() {

			@SuppressWarnings("unused")
			public byte[] handleMessage(byte[] in) {
				return "reply".getBytes();
			}

		});
		container.setMessageListener(mla);
		container.afterPropertiesSet();
		container.start();
		RabbitTemplate template = new RabbitTemplate(cf);
		template.afterPropertiesSet();
		final BasicProperties props = new BasicProperties.Builder().replyTo("amq.rabbitmq.reply-to").build();
		for (int i = 0; i < 100000; i++) {
			template.execute(new ChannelCallback<Void>() {

				@Override
				public Void doInRabbit(Channel channel) throws Exception {
					final CountDownLatch latch = new CountDownLatch(1);
					String tag = channel.basicConsume("amq.rabbitmq.reply-to", true, new DefaultConsumer(channel) {

						@Override
						public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties,
								byte[] body) throws IOException {
							latch.countDown();
						}

					});
					channel.basicPublish("", declareOk.getQueue(), props, "request".getBytes());
					assertTrue(latch.await(10, TimeUnit.SECONDS));
					channel.basicCancel(tag);
					return null;
				}

			});
		}

	}

}