随笔记：ActiveMQ搭建与使用

下载

到ActiveMQ官网，找到下载点。

目前，

官网为http://activemq.apache.org/

Linux版本下载点之一为：http://apache.fayea.com/activemq/5.11.1/apache-activemq-5.11.1-bin.tar.gz

启动

下载到本机，并解压

wget http://apache.fayea.com/activemq/5.11.1/apache-activemq-5.11.1-bin.tar.gz
tar -xf ./apache-activemq-5.11.1-bin.tar.gz

启动（当然，由于依赖于JAVA，如果你没有安装JAVA，它会提醒你的，哈哈）

cd ./apache-activemq-5.11.1-bin/bin
./activemq start

测试启动成功与否

ActiveMQ默认监听61616端口，查此端口看看是否成功启动

netstat -an|grep 61616

如果一切顺利，会看到如下日志

[[email protected] bin]$ ./activemq start
INFO: Loading ‘/home/nicchagil/app/apache-activemq-5.11.1/bin/env‘
INFO: Using java ‘/home/nicchagil/app/jdk1.7.0_71//bin/java‘
INFO: Starting - inspect logfiles specified in logging.properties and log4j.prop                                                                                                                                                             erties to get details
INFO: pidfile created : ‘/home/nicchagil/app/apache-activemq-5.11.1/data/activem                                                                                                                                                             q.pid‘ (pid ‘4858‘)
[[email protected] bin]$
[[email protected] bin]$
[[email protected] bin]$
[[email protected] bin]$ netstat -an | grep 61616
tcp        0      0 :::61616                    :::*                        LIST                                                                                                                                                             EN
[[email protected] bin]$

顺便，登录下管理员页面，看看有木有问题：

URL : http://10.0.0.109:8161/admin/

ACC/PWD : admin/admin

尝试基本消息功能

接下来，用简单的点对点测试消息发送、消息接收。

引入包：

• activemq-client-5.11.1.jar
• geronimo-j2ee-management_1.1_spec-1.0.1.jar
• geronimo-jms_1.1_spec-1.1.1.jar
• hawtbuf-1.11.jar
• slf4j-api-1.7.10.jar

消息发送

package com.nicchagil.activemq.study.No001点对点;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Sender {

    public static void main(String[] args) throws JMSException {
        ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, "tcp://10.0.0.109:61616");
        Connection connection = factory.createConnection();
        connection.start();
        Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
        Destination destination = session.createQueue("TestQueue");
        MessageProducer producer = session.createProducer(destination);
        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
        ObjectMessage message = session.createObjectMessage("hello world...");
        producer.send(message);
        session.commit();
        System.out.println("sent...");
    }

}

消息接收

package com.nicchagil.activemq.study.No001点对点;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.ObjectMessage;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Receiver {

    public static void main(String[] args) throws JMSException {
        ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD,
                "tcp://10.0.0.109:61616");
        Connection connection = factory.createConnection();
        connection.start();
        Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
        Destination destination = session.createQueue("TestQueue");

        MessageConsumer consumer = session.createConsumer(destination);
        ObjectMessage message = (ObjectMessage)consumer.receive();
        if (message != null) {
            String messageString = (String)message.getObject();
            System.out.println("Receive : " + messageString);
        }
    }

}

看到console打印出：Receive : hello world...，可知接收到消息了，内流满面啊啊啊啊。。。

关闭

查询进程id（pid），禁止其进程：

ps -ef | grep activemq
kill -9 pid

再运行Sender，她就无法连接了，哈哈哈哈哈

Exception in thread "main" javax.jms.JMSException: Could not connect to broker URL: tcp://10.0.0.109:61616. Reason: java.net.ConnectException: Connection refused: connect

好了，基本的搭建告一段落。

荆棘

过程中，遇到一个小问题，就是我一开始是用JDK1.6去跑的，报出常见的Unsupported major.minor version 51.0

针对这个问题，这个帖子有很好的参考意义：

http://www.cnblogs.com/chinafine/articles/1935748.html

找出jar中的一个class，执行以下命令，可查出minor version、major version：

javap -verbose yourClassName

或直接查看jar中的META-INF\MANIFEST.MF。

然后对照帖子中的JDK版本，换成JDK1.7就OK了。