消息隊列activeMQ之(Topic類型）的小demo(學習筆記之四)

1、建立pom項目添加pom依賴

<dependency>
  <groupId>org.apache.activemq</groupId>
  <artifactId>activemq-all</artifactId>
  <version>5.11.2</version>
</dependency>

2、創建man方法向MQ寫入隊列消息

package com.demo;
import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;

/**
 * Created by luwan on 2018/4/14.
 */
public class App2 {
    public static void main(String[] args) throws JMSException {
        // 發送一個隊列模式的消息
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://192.168.223.131:61616");
        Connection connection = connectionFactory.createConnection();
        connection.start();

        // 創建會話
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        // 消息對象
        Topic topic = session.createTopic("office-topic");

        // 消息內容
        TextMessage textMessage = session.createTextMessage("爲中華民族偉大復興而努力奮鬥...");

        // 發送端
        MessageProducer producer = session.createProducer(topic);


        // 發送消息
        producer.send(textMessage);

        // 關閉連接
        producer.close();
        session.close();
        connection.close();
    }
}

3、查看MQ的消息

package ma。comsumer;

import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;

/**
 * Created by luwan on 2018/4/14.
 */
public class App3 {
    public static void main(String[] args) throws Exception {
        xl();
    }

    public static void xl() throws Exception {
        // 創建連接
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://192.168.223.131:61616");
        Connection connection = connectionFactory.createConnection();
        connection.setClientID("1");
        connection.start();

        // 創建 會話
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        // 創建消息對象
        Topic topic = session.createTopic("office-topic");

        // 接收端
        MessageConsumer consumer = session.createDurableSubscriber(topic, "1");

        // 接收消息
        consumer.setMessageListener(new MessageListener() {// 消息監聽器，監聽mq服務器的變化
            @Override
            public void onMessage(Message message) {
                // 打印結果
                TextMessage textMessage = (TextMessage) message;
                String text = "";
                try {
                    text = textMessage.getText();
                } catch (JMSException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                System.err.println("讀者，聽到了" + text + ",背起了炸藥包");
            }
        });
        // 等待接收消息
        System.in.read();
    }
}

package macomsumer;

import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;

/**
 * Created by luwan on 2018/4/14.
 */
public class App3 {
    public static void main(String[] args) throws Exception {
        xl();
    }

    public static void xl() throws Exception {
        // 創建連接
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://192.168.223.131:61616");
        Connection connection = connectionFactory.createConnection();
        connection.setClientID("1");
        connection.start();

        // 創建 會話
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        // 創建消息對象
        Topic topic = session.createTopic("office-topic");

        // 接收端
        MessageConsumer consumer = session.createDurableSubscriber(topic, "1");

        // 接收消息
        consumer.setMessageListener(new MessageListener() {// 消息監聽器，監聽mq服務器的變化
            @Override
            public void onMessage(Message message) {
                // 打印結果
                TextMessage textMessage = (TextMessage) message;
                String text = "";
                try {
                    text = textMessage.getText();
                } catch (JMSException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                System.err.println("雷鋒，聽到了" + text + ",復活了");
            }
        });
        // 等待接收消息
        System.in.read();
    }
}

備註：注意第二種讀取，由於topic默認是不永久保存的，所以在producter中創建了一塊空間，producter發送消息後，即便是服務沒有開啓也會在重啓的時候讀到producter的信息

4、另一個comsumer接受MQ消息

4.客戶端表格的字段含義

                        掛起的消息                         在監聽的人數             入隊的消息              消費的消息

1 隊列模式的消息，默認永久保存

2 訂閱模式的消息，默認不永久保存，如果需要永久保存，需要爲consumer在服務器上初始化一個永久保存的存儲空間