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java之消息隊列ActiveMQ實踐

web .tar.gz 消息隊列 world 默認端口 一個 bre -a 文本消息

原創論文:https://www.cnblogs.com/goujh/p/8510239.html

1、在安裝ActiveMQ

http://activemq.apache.org/activemq-5158-release.html

2、解壓啟動服務

tar -zxvf apache-activemq-5.15.8-bin.tar.gz
進入目錄,運行./bin/activemq start

3、網頁查看

網址:http://139.199.64.189:8161/
點擊:
Manage ActiveMQ broker
輸入默認用戶和密碼都為:admin

4、創建maven工程,在pom.xml文件中添加

<!-- https://mvnrepository.com/artifact/org.apache.activemq/activemq-core -->
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-core</artifactId>
            <version>5.7.0</version>
        </dependency>

5、創建JMSConsumer.java文件,這是一個消費者

package com.activemq.demo.method1;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
public class JMSConsumer { //默認連接用戶名 private static final String USERNAME = "admin";//ActiveMQConnection.DEFAULT_USER; //默認連接密碼 private static final String PASSWORD = "admin";//ActiveMQConnection.DEFAULT_PASSWORD; //默認連接地址,默認端口為61616 private static final String BROKERURL = "tcp://ip:61616";//ActiveMQConnection.DEFAULT_BROKER_URL; public static void main(String[] args) { //連接工廠 ConnectionFactory connectionFactory; //連接 Connection connection = null; //會話,接收或者發送消息的線程 Session session; //消息目的地 Destination destination; //消息的消費者 MessageConsumer messageConsumer; //實例化連接工廠 connectionFactory = new ActiveMQConnectionFactory(JMSConsumer.USERNAME, JMSConsumer.PASSWORD, JMSConsumer.BROKERURL); try { //通過工廠獲取連接 connection = connectionFactory.createConnection(); //啟動連接 connection.start(); //創建會話 session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); //創建一個連接Hello World!的消息隊列 destination = session.createQueue("Hello World"); //創建消息的消費者 messageConsumer = session.createConsumer(destination); while(true){ TextMessage textMessage = (TextMessage) messageConsumer.receive(100000); if (textMessage != null) { System.err.println("收到的消息:" + textMessage.getText()); } else { break; } } } catch (Exception e) { e.printStackTrace(); } } }

6、創建JMSProducer.java,這是一個生產者

package com.activemq.demo.method1;

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 javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
public class JMSProducer {
    //默認連接用戶名
    private static final String USERNAME = "admin";//ActiveMQConnection.DEFAULT_USER;
    //默認連接密碼
    private static final String PASSWORD = "admin";//ActiveMQConnection.DEFAULT_PASSWORD;
    //默認連接地址,默認端口為61616
    private static final String BROKERURL = "tcp://ip:61616";//ActiveMQConnection.DEFAULT_BROKER_URL;
    //發送的消息數量
    private static final int SENDNUM = 10;
    public static void main(String[] args) {
        //連接工廠
        ConnectionFactory connectionFactory;
        //連接
        Connection connection = null;
        //會話,接收或者發送消息的線程
        Session session;
        //消息的目的地
        Destination destination;
        //消息生產者
        MessageProducer messageProducer;
        //實例化連接工廠
        connectionFactory = new ActiveMQConnectionFactory(JMSProducer.USERNAME, JMSProducer.PASSWORD, JMSProducer.BROKERURL);
        try {
            //通過連接工廠獲取連接
            connection = connectionFactory.createConnection();
            //啟動連接
            connection.start();
            //創建session
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            //創建一個名稱為Hello World!的消息隊列
            destination = session.createQueue("Hello World");
            //創建消息生產者
            messageProducer = session.createProducer(destination);
            //發送消息
            sendMessage(session,messageProducer);
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally{
            if(connection != null){
                try {
                    connection.close();
                } catch (JMSException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    /**
     * 發送消息
     * @param session
     * @param messageProducer 消息生產者
     * @throws Exception
     */
    public static void sendMessage(Session session,MessageProducer messageProducer) throws Exception{
        for (int i = 0; i < JMSProducer.SENDNUM; i++) {
            //創建一條文本消息
            TextMessage message = session.createTextMessage("activemq 發送消息:" + i);
            System.err.println("發送消息:activemq 發送消息:" + i);
            //通過消息生產者發出消息
            messageProducer.send(message);
        }
    }
}

7、運行兩個實例,可在web端查看

java之消息隊列ActiveMQ實踐