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ActiveMQ的初次认识

程序员文章站 2024-03-24 08:58:52
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首先来说一说ActiveMQ的优点:
1.多种语言和协议编写客户端。语言: Java, C, C++, C#, Ruby, Perl, Python, PHP。应用协议: OpenWire,Stomp REST,WS Notification,XMPP,AMQP。
2.完全支持JMS1.1和J2EE 1.4规范 (持久化,XA消息,事务)。
3.对Spring的支持,ActiveMQ可以很容易内嵌到使用Spring的系统里面去,而且也支持Spring2.0的特性。
4.通过了常见J2EE服务器(如 Geronimo,JBoss 4, GlassFish,WebLogic)的测试,其中通过JCA 1.5 resource adaptors的配置,可以让ActiveMQ可以自动的部署到任何兼容J2EE 1.4 商业服务器上。
5.支持多种传送协议:in-VM,TCP,SSL,NIO,UDP,JGroups,JXTA。
6.支持通过JDBC和journal提供高速的消息持久化。
7.支持Ajax。
8.支持与Axis的整合。

二 适用场景
1.多个项目之间集成
(1) 跨平台
(2) 多语言
(3) 多项目
2.降低系统间模块的耦合度,解耦
(1) 软件扩展性
3.系统前后端隔离
(1) 前后端隔离,屏蔽高安全区

三 创建一个简单的ActiveMQ项目

ActiveMQ的初次认识
1.创建一个生产者

public class Producter {

    //ActiveMq 的默认用户名
    private static final String USERNAME = ActiveMQConnection.DEFAULT_USER;
    //ActiveMq 的默认登录密码
    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
    //ActiveMQ 的链接地址
    private static final String BROKEN_URL = ActiveMQConnection.DEFAULT_BROKER_URL;

    AtomicInteger count = new AtomicInteger(0);
    //链接工厂
    ConnectionFactory connectionFactory;
    //链接对象
    Connection connection;
    //事务管理
    Session session;
    ThreadLocal<MessageProducer> threadLocal = new ThreadLocal<>();

    public void init(){
        try {
            //创建一个链接工厂
            connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEN_URL);
            //从工厂中创建一个链接
            connection  = connectionFactory.createConnection();
            //开启链接
            connection.start();
            //创建一个事务(这里通过参数可以设置事务的级别)
            session = connection.createSession(true,Session.SESSION_TRANSACTED);
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }

    public void sendMessage(String disname){
        try {
            //创建一个消息队列
            Queue queue = session.createQueue(disname);
            //消息生产者
            MessageProducer messageProducer = null;
            if(threadLocal.get()!=null){
                messageProducer = threadLocal.get();
            }else{
                messageProducer = session.createProducer(queue);
                threadLocal.set(messageProducer);
            }
           while(true){
                Thread.sleep(1000);
                int num = count.getAndIncrement();
                //创建一条消息
                TextMessage msg = session.createTextMessage(Thread.currentThread().getName()+
                        "productor:我是996的码农,我现在正在生产东西!,count:"+num);
                System.out.println(Thread.currentThread().getName()+
                        "productor:我是996的码农,我现在正在生产东西!,count:"+num);
                //发送消息
                messageProducer.send(msg);
                //提交事务
                session.commit();
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

2.创建一个消费者

public class Comsumer {

    private static final String USERNAME = ActiveMQConnection.DEFAULT_USER;

    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;

    private static final String BROKEN_URL = ActiveMQConnection.DEFAULT_BROKER_URL;

    ConnectionFactory connectionFactory;

    Connection connection;

    Session session;

    ThreadLocal<MessageConsumer> threadLocal = new ThreadLocal<>();
    AtomicInteger count = new AtomicInteger();

    public void init(){
        try {
            connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEN_URL);
            connection  = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }


    public void getMessage(String disname){
        try {
            Queue queue = session.createQueue(disname);
            MessageConsumer consumer = null;

            if(threadLocal.get()!=null){
                consumer = threadLocal.get();
            }else{
                consumer = session.createConsumer(queue);
                threadLocal.set(consumer);
            }
            while(true){
                Thread.sleep(1000);
                TextMessage msg = (TextMessage) consumer.receive();
                if(msg!=null) {
                    msg.acknowledge();
                    System.out.println(Thread.currentThread().getName()+": Consumer:我是老板,我正在消费Msg"+msg.getText()+"--->"+count.getAndIncrement());
                }else {
                    break;
                }
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

3.编写测试代码

生产者测试类


public class TestMq {
    public static void main(String[] args){
        Producter producter = new Producter();
        producter.init();
        TestMq testMq = new TestMq();
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //Thread 1
        new Thread(testMq.new ProductorMq(producter)).start();
        //Thread 2
        new Thread(testMq.new ProductorMq(producter)).start();
        //Thread 3
        new Thread(testMq.new ProductorMq(producter)).start();
        //Thread 4
        new Thread(testMq.new ProductorMq(producter)).start();
        //Thread 5
        new Thread(testMq.new ProductorMq(producter)).start();
    }

    private class ProductorMq implements Runnable{
        Producter producter;
        public ProductorMq(Producter producter){
            this.producter = producter;
        }

        @Override
        public void run() {
            while(true){
                try {
                    producter.sendMessage("Jaycekon-MQ");
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

消费者测试类

public class TestConsumer {
    public static void main(String[] args){
        Comsumer comsumer = new Comsumer();
        comsumer.init();
        TestConsumer testConsumer = new TestConsumer();
        new Thread(testConsumer.new ConsumerMq(comsumer)).start();
        new Thread(testConsumer.new ConsumerMq(comsumer)).start();
        new Thread(testConsumer.new ConsumerMq(comsumer)).start();
        new Thread(testConsumer.new ConsumerMq(comsumer)).start();
    }

    private class ConsumerMq implements Runnable{
        Comsumer comsumer;
        public ConsumerMq(Comsumer comsumer){
            this.comsumer = comsumer;
        }

        @Override
        public void run() {
            while(true){
                try {
                    comsumer.getMessage("Jaycekon-MQ");
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
相关标签: Active MQ