ActiveMq--消息队列

ActiveMQ官网下载地址：http://activemq.apache.org/download.html

ActiveMQ的目录：

• bin存放的是脚本文件
• conf存放的是基本配置文件
• data存放的是日志文件
• docs存放的是说明文档
• examples存放的是简单的实例
• lib存放的是activemq所需jar包
• webapps用于存放项目的目录

我们可以做ActiveMQ 服务端：http://127.0.0.1:8161/admin/ 里面的Queues 中查看我们生产的消息。账户和密码默认是admin

创建生产者

package message.queue;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.*;
import java.util.concurrent.atomic.AtomicInteger;

public class Producer {

    //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(1);
                int num = count.getAndIncrement();
                //创建一条消息
                TextMessage msg = session.createTextMessage(Thread.currentThread().getName() +
                        "producer:我是大帅哥，我现在正在生产东西！,count:" + num);
                System.out.println(Thread.currentThread().getName() +
                        "producer:我是大帅哥，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();
        }
    }

}

生产者开始生产消息

package message.queue;

public class TestProducer {
    public static void main(String[] args){
        Producer producer = new Producer();
        producer.init();
        TestProducer testProducer = new TestProducer();
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //Thread 1
        new Thread(testProducer.new ProducerMq(producer)).start();
        //Thread 2
        new Thread(testProducer.new ProducerMq(producer)).start();
        //Thread 3
        new Thread(testProducer.new ProducerMq(producer)).start();
        //Thread 4
        new Thread(testProducer.new ProducerMq(producer)).start();
        //Thread 5
        new Thread(testProducer.new ProducerMq(producer)).start();
    }

    private class ProducerMq implements Runnable{
        Producer producer;
        public ProducerMq(Producer producer){
            this.producer = producer;
        }

        @Override
        public void run() {
            while(true){
                try {
                    producer.sendMessage("Jackie-MQ56789");
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

创建消费者

package message.queue;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.*;
import java.util.concurrent.atomic.AtomicInteger;

public class Consumer {

    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 displayName) {
        try {
            Queue queue = session.createQueue(displayName);
            MessageConsumer messageConsumer = null;

            if (threadLocal.get() != null) {
                messageConsumer = threadLocal.get();
            } else {
                messageConsumer = session.createConsumer(queue);
                threadLocal.set(messageConsumer);
            }
            while (true) {
                Thread.sleep(1000);//这里的数值调小，线程调用就更明显
                TextMessage msg = (TextMessage) messageConsumer.receive();
                if (msg != null) {
                    msg.acknowledge();
                    System.out.println(Thread.currentThread().getName() + ": Consumer:我是消费者，我正在消费Msg" + msg.getText() + "--->" + count.getAndIncrement());
                } else {
                    break;
                }
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

消费者开始消费消息

package message.queue;

public class TestConsumer {
    public static void main(String[] args) {
        Consumer consumer = new Consumer();
        consumer.init();
        TestConsumer testConsumer = new TestConsumer();

        new Thread(testConsumer.new ConsumerMq(consumer)).start();
        new Thread(testConsumer.new ConsumerMq(consumer)).start();
        new Thread(testConsumer.new ConsumerMq(consumer)).start();
        new Thread(testConsumer.new ConsumerMq(consumer)).start();
    }

    private class ConsumerMq implements Runnable {
        Consumer consumer;

        public ConsumerMq(Consumer consumer) {
            this.consumer = consumer;
        }

        @Override
        public void run() {
            while (true) {
                try {
                    consumer.getMessage("Jackie-MQ56789");
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

github：https://github.com/kejiefu/message-queue