ActiveMq详解（二）

ActiveMq详解

非持久化消息订阅

订阅即多消费者对同一topic的订阅，生产消息将被所订阅的所有消费者接收。
生产者生成的消息只会被订阅的消费者消费，如若消费者宕机，在宕机过程中产生的消息不再被恢复的消费者消费。

生产者

package com.ccycc.activemq.project.subscriber.producer;

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

import org.apache.activemq.ActiveMQConnectionFactory;


public class JMSProducer {

    public static void main(String[] args) {

        JMSProducer jmsProducer = new JMSProducer();
        jmsProducer.producer();
    }
    private void producer() {

        ConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        Destination destination = null;
        MessageProducer producer = null;
        try {

            connectionFactory = new ActiveMQConnectionFactory("admin", "admin", "tcp://192.168.182.129:61616");
            //创建连接
            connection = connectionFactory.createConnection();
            //启动连接
            connection.start();
            //创建session
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            //创建消息队列
            destination = session.createTopic("jms_t");
            //对于该队列创建生成者
            producer = session.createProducer(destination);
            //生成者发生消息
            producer.send(session.createTextMessage("hello"));
            session.commit();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }finally {

            try {
                if(session != null) {

                    session.close();
                }
            } catch (JMSException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }finally {

                try {
                    if(connection != null) {

                        connection.close();
                    }
                } catch (JMSException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}

消费者

package com.ccycc.activemq.project.subscriber.consumer;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

public class JMSConsumer {

    public static void main(String[] args) {

        JMSConsumer consumer = new JMSConsumer();
        consumer.consumer();
    }
    public void consumer() {

        ConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        Destination destination = null;
        MessageConsumer consumer = null;

        try {

            connectionFactory = new ActiveMQConnectionFactory("admin", "admin", "tcp://192.168.182.129:61616");
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination = session.createTopic("jms_t");
            consumer = session.createConsumer(destination);
            consumer.setMessageListener(new MessageListener() {

                @Override
                public void onMessage(Message message) {
                    // TODO Auto-generated method stub
                    if(message != null) {

                        if(message instanceof TextMessage) {

                            TextMessage textMessage = (TextMessage) message;
                            try {
                                //textMessage.getJMSRedelivered()
                                System.out.println(textMessage.getText());
                            } catch (JMSException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                    }
                }
            });
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }
}

持久化消息订阅

可订阅历史消息
生产者

package com.ccycc.activemq.project.subscriber.producer;

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.Session;

import org.apache.activemq.ActiveMQConnectionFactory;


public class JMSProducer {

    public static void main(String[] args) {

        JMSProducer jmsProducer = new JMSProducer();
        jmsProducer.producer();
    }
    private void producer() {

        ConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        Destination destination = null;
        MessageProducer producer = null;
        try {

            connectionFactory = new ActiveMQConnectionFactory("admin", "admin", "tcp://192.168.182.129:61616");
            //创建连接
            connection = connectionFactory.createConnection();

            //创建session
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            //创建消息队列
            destination = session.createTopic("jms_t");
            //对于该队列创建生成者
            producer = session.createProducer(destination);
            //设置为持久化订阅方式
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
            //设置完成启动连接
            connection.start();
            //生成者发生消息
            producer.send(session.createTextMessage("hello"));
            session.commit();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }finally {

            try {
                if(session != null) {

                    session.close();
                }
            } catch (JMSException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }finally {

                try {
                    if(connection != null) {

                        connection.close();
                    }
                } catch (JMSException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}

消费者

package com.ccycc.activemq.project.subscriber.consumer;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;

public class JMSConsumer {

    public static void main(String[] args) {

        JMSConsumer consumer = new JMSConsumer();
        consumer.consumer();
    }
    public void consumer() {

        ConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        Destination destination = null;
        MessageConsumer consumer = null;
        String clientId = "id";

        try {

            connectionFactory = new ActiveMQConnectionFactory("admin", "admin", "tcp://192.168.182.129:61616");
            connection = connectionFactory.createConnection();
            connection.setClientID(clientId);

            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            Topic topic = session.createTopic("jms_t");
            consumer = session.createDurableSubscriber(topic, "sub");
            //consumer = session.createConsumer(destination);
            consumer.setMessageListener(new MessageListener() {

                @Override
                public void onMessage(Message message) {
                    // TODO Auto-generated method stub
                    if(message != null) {

                        if(message instanceof TextMessage) {

                            TextMessage textMessage = (TextMessage) message;
                            try {
                                //textMessage.getJMSRedelivered()
                                System.out.println(textMessage.getText());
                            } catch (JMSException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                    }
                }
            });
            connection.start();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }
}