Apache ActiveMQ DEMO的搭建流程

此處描述一下從配置mq軟件到搭建項目的整個流程。

1.首先需要安裝ActiveMQ，到Apache官網下載相關的安裝包 http://activemq.apache.org/download-archives.html

此處我下載的版本是 ActiveMQ 5.9.1 Release ，將其解壓到linux的centos下的/usr/local下的目錄，進入/usr/local/apache-activemq-5.9.1/bin，運行./activemq start就啓動完畢了，通常情況下肯定是正常的。

2.新建一個maven項目，添加項目依賴：

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>5.9.1</version>
        </dependency>
        <!-- 日誌相關依賴 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
    </dependencies>
    <properties>
        <log4j.version>1.2.12</log4j.version>
        <slf4j.version>1.6.6</slf4j.version>
    </properties>

3.建立消息生產者ProducerQueueApp.java

package com.demo.activemq.demo;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jms.*;

/**
 * Producer 功能描述：ActiveMQ生產者實例
 *
 * @author RickyLee
 * @date 2016/11/3 13:17
 */
public class ProducerQueueApp {

    private static final Logger LOGGER = LoggerFactory.getLogger(ProducerQueueApp.class);
    private static final String BROKER_URL = "tcp://192.168.0.104:61616";
    private static final String SUBJECT = "test-activemq-queue";

    public static void main(String[] args) throws JMSException {
        //初始化連接工廠
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);
        //獲得連接
        Connection conn = connectionFactory.createConnection();
        //啓動連接，因爲默認是關閉的
        conn.start();

        //創建Session，此方法第一個參數表示會話是否在事務中執行，第二個參數設定會話的應答模式
        Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

        //創建隊列
        Destination dest = session.createQueue(SUBJECT);
        //createTopic方法用來創建Topic
        //session.createTopic("TOPIC");

        //通過session可以創建消息的生產者
        MessageProducer producer = session.createProducer(dest);
        for (int i = 0; i < 5; i++) {
            //初始化一個mq消息
            TextMessage message = session.createTextMessage("hello active mq 中文" + i);
            //發送消息
            producer.send(message);
            LOGGER.debug("send message {}", i);
        }

        //關閉mq連接
        conn.close();
    }
}

4.創建消費者

package com.sdzn.activemq.demo;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jms.*;
/**
 * ConsumerApp 功能描述：ActiveMQ消費者實例
 *
 * @author RickyLee 
 * @date 2016/11/3 13:27
 */
public class ConsumerApp implements MessageListener {
    private static final Logger LOGGER = LoggerFactory.getLogger (ConsumerApp.class);
    private static final String BROKER_URL = "tcp://192.168.0.104:61616";
    private static final String SUBJECT = "test-activemq-queue";

    public static void main(String[] args) throws JMSException {
        //初始化ConnectionFactory
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);

        //創建mq連接
        Connection conn = connectionFactory.createConnection();
        //啓動連接
        conn.start();

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

        //通過會話創建目標
        Destination dest = session.createQueue(SUBJECT);
        //創建mq消息的消費者
        MessageConsumer consumer = session.createConsumer(dest);

        //初始化MessageListener
        ConsumerApp me = new ConsumerApp();

        //給消費者設定監聽對象
        consumer.setMessageListener(me);
    }

    public void onMessage(Message message) {
        TextMessage txtMessage = (TextMessage)message;
        try {
            LOGGER.info ("get message " + txtMessage.getText());
        } catch (JMSException e) {
            LOGGER.error("error {}", e);
        }
    }
}

5.至此，搭建基本完成。通過運行生產者，進入http://192.168.0.104:8161/admin，如果有填用戶名密碼的地方都填admin，進入以後可以看到發送的消息；

點開test-activemq-queue可以看到

這個時候啓動消費者，可以看到控制檯打印的日誌消息，同時，mq上的消息被消費；

至於消息訂閱/發佈模式和應答模式，還在研究中，後續再發文。