JMS学习笔记(五)——ActiveMQ简介
1.简介
ActiveMQ 是Apache出品,最流行的,能力强劲的开源消息总线。ActiveMQ 是一个完全支持JMS1.1和J2EE 1.4规范的 JMS Provider实现,尽管JMS规范出台已经是很久的事情了,但是JMS在当今的J2EE应用中间仍然扮演着特殊的地位。
2.使用
1)下载ActiveMQ
去官方网站下载:http://activemq.apache.org/
2)运行ActiveMQ
解压缩apache-activemq-5.5.1-bin.zip,然后双击apache-activemq-5.5.1\bin\activemq.bat运行ActiveMQ程序。
启动ActiveMQ以后,登陆:http://localhost:8161/admin/,创建一个Queue,命名为FirstQueue。
3)创建Eclipse项目并运行
Sender.java
import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.DeliveryMode; import javax.jms.Destination; import javax.jms.MessageProducer; import javax.jms.Session; import javax.jms.TextMessage; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; public class Sender { private static final int SEND_NUMBER = 5; public static void main(String[] args) { new Sender().send(); } public void send() { // ConnectionFactory :连接工厂,JMS 用它创建连接 ConnectionFactory connectionFactory; // Connection :JMS 客户端到JMS Provider 的连接 Connection connection = null; // Session: 一个发送或接收消息的线程 Session session; // Destination :消息的目的地;消息发送给谁. Destination destination; // MessageProducer:消息发送者 MessageProducer producer; // TextMessage message; // 构造ConnectionFactory实例对象,此处采用ActiveMq的实现jar connectionFactory = new ActiveMQConnectionFactory( ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616"); try { // 构造从工厂得到连接对象 connection = connectionFactory.createConnection(); // 启动 connection.start(); // 获取操作连接 session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); // 获取session注意参数值xingbo.xu-queue是一个服务器的queue,须在在ActiveMq的console配置 destination = session.createQueue("FirstQueue"); // 得到消息生成者【发送者】 producer = session.createProducer(destination); // 设置不持久化,此处学习,实际根据项目决定 producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); // 构造消息,此处写死,项目就是参数,或者方法获取 sendMessage(session, producer); session.commit(); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != connection) connection.close(); } catch (Throwable ignore) { } } } public static void sendMessage(Session session, MessageProducer producer) throws Exception { for (int i = 1; i <= SEND_NUMBER; i++) { TextMessage message = session.createTextMessage("ActiveMQ 发送的消息"+ i); // 发送消息到目的地方 System.out.println("发送消息:" + "ActiveMQ 发送的消息" + i); producer.send(message); } } }
Receiver.java
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.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; public class Receiver{ public static void main(String[] args) { new Receiver().receive(); } public void receive() { // ConnectionFactory :连接工厂,JMS 用它创建连接 ConnectionFactory connectionFactory; // Connection :JMS 客户端到JMS Provider 的连接 Connection connection = null; // Session: 一个发送或接收消息的线程 Session session; // Destination :消息的目的地;消息发送给谁. Destination destination; // 消费者,消息接收者 MessageConsumer consumer; connectionFactory = new ActiveMQConnectionFactory( ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616"); try { // 构造从工厂得到连接对象 connection = connectionFactory.createConnection(); // 启动 connection.start(); // 获取操作连接 session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE); // 获取session注意参数值xingbo.xu-queue是一个服务器的queue,须在在ActiveMq的console配置 destination = session.createQueue("FirstQueue"); consumer = session.createConsumer(destination); while (true) { //设置接收者接收消息的时间,为了便于测试,这里谁定为100s TextMessage message = (TextMessage) consumer.receive(100000); if (null != message) { System.out.println("收到消息" + message.getText()); } else { break; } } } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != connection) connection.close(); } catch (Throwable ignore) { } } } }
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