org.springframework.amqp.rabbit.admin.RabbitTemplateConsumerExample.java Source code

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Here is the source code for org.springframework.amqp.rabbit.admin.RabbitTemplateConsumerExample.java

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/*
 * Copyright 2002-2010 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.admin;

import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

/**
 * @author Mark Fisher
 * @author Mark Pollack
 */
public class RabbitTemplateConsumerExample {

    private static Log log = LogFactory.getLog(RabbitTemplateConsumerExample.class);

    public static void main(String[] args) throws Exception {
        boolean sync = true;
        if (sync) {
            ConfigurableApplicationContext ctx = new AnnotationConfigApplicationContext(
                    TestRabbitConfiguration.class);
            RabbitTemplate template = ctx.getBean(RabbitTemplate.class);
            receiveSync(template, TestConstants.NUM_MESSAGES);
        } else {
            ConfigurableApplicationContext ctx = new AnnotationConfigApplicationContext(
                    RabbitConsumerConfiguration.class);
            receiveAsync(ctx);
        }
    }

    private static void receiveAsync(ConfigurableApplicationContext ctx) throws InterruptedException {
        ctx.getBean(SimpleMessageListenerContainer.class);
        log.debug("Main execution thread sleeping 5 seconds...");
        Thread.sleep(500000);
        log.debug("Application exiting.");
        System.exit(0);
    }

    private static void receiveSync(RabbitTemplate template, int numMessages) {
        // receive response
        for (int i = 0; i < numMessages; i++) {
            Message message = template.receive(TestConstants.QUEUE_NAME);
            if (message == null) {
                System.out.println("Thread [" + Thread.currentThread().getId() + "] Received Null Message!");
            } else {
                System.out.println("Thread [" + Thread.currentThread().getId() + "] Received Message = "
                        + new String(message.getBody()));
                Map<String, Object> headers = message.getMessageProperties().getHeaders();
                Object objFloat = headers.get("float");
                Object objcp = headers.get("object");
                System.out.println("float header type = " + objFloat.getClass());
                System.out.println("object header type = " + objcp.getClass());
            }
        }
    }

    public static class SimpleMessageListener implements MessageListener {

        private final AtomicInteger messageCount = new AtomicInteger();

        public void onMessage(Message message) {
            int msgCount = this.messageCount.incrementAndGet();
            System.out.println(
                    "Thread [" + Thread.currentThread().getId() + "] SimpleMessageListener Received Message "
                            + msgCount + ", = " + new String(message.getBody()));
        }
    }

}