标签:pid cte tcp connect enc ups apach package throw
实现点对点通讯模式
<dependency> <groupId>org.apache.activemq</groupId> <artifactId>activemq-core</artifactId> <version>5.7.0</version> </dependency>
package com.wn.ddd; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import javax.jms.*; public class Producter { public static void main(String[] args) throws JMSException { // ConnectionFactory :连接工厂,JMS 用它创建连接 ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, "tcp://127.0.0.1:61616"); // JMS 客户端到JMS Provider 的连接 Connection connection = connectionFactory.createConnection(); //启动连接 connection.start(); // Session: 一个发送或接收消息的线程 false:代表不带事务的session AUTO_ACKNOWLEDGE:代表自动签收 Session session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE); // Destination :消息的目的地;消息发送给谁. // 获取session注意参数值my-queue是Query的名字 Queue queue = session.createQueue("my-queue"); // MessageProducer:创建消息生产者 MessageProducer producer = session.createProducer(queue); // 设置不持久化 PERSISTENT:代表持久化 NON_PERSISTENT:代表不持久化 producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); // 发送消息 for (int i = 1; i <= 5; i++) { sendMsg(session, producer, i); } System.out.println("发送成功!"); session.close(); connection.close(); } /** * 在指定的会话上,通过指定的消息生产者发出一条消息 * * @param session * 消息会话 * @param producer * 消息生产者 */ public static void sendMsg(Session session, MessageProducer producer, int i) throws JMSException { // 创建一条文本消息 TextMessage message = session.createTextMessage("Hello ActiveMQ!" + i); // 通过消息生产者发出消息 producer.send(message); } }
package com.wn.ddd; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import javax.jms.*; public class JmsReceiver { public static void main(String[] args) throws JMSException { // ConnectionFactory :连接工厂,JMS 用它创建连接 ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, "tcp://127.0.0.1:61616"); // JMS 客户端到JMS Provider 的连接 Connection connection = connectionFactory.createConnection(); connection.start(); // Session: 一个发送或接收消息的线程 true:表单开启事务 AUTO_ACKNOWLEDGE:代表自动签收 Session session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE); // Destination :消息的目的地;消息发送给谁. // 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 Queue queue = session.createQueue("my-queue"); // 消费者,消息接收者 MessageConsumer consumer = session.createConsumer(queue); while (true) { //receive():获取消息 TextMessage message = (TextMessage) consumer.receive(); if (null != message) { System.out.println("收到消息:" + message.getText()); } else { break; } } //回收资源 session.close(); connection.close(); } }
控制台执行完成后,去查看一下队列的情况
可以再次查看队列的情况
ActiveMQ消息签收机制:
客户端成功接收一条消息的标志是一条消息被签收,成功应答。
消息的签收情况分为两种:
1.带事务的session
如果session带有事务,并且事务成功提交,则消息被自动签收。如果事务回滚,则消息会被再次传递。
2.不带事务的session
不带事务的session签收方式,取决于session的配置。
ActiveMQ支持以下三种模式:
1.Session.AUTO_ACKNOWLEDGE 消息自动签收
2.Session.CLIENT_ACKNOWLEDGE 客户端调用acknowledge方法手动签收
textMessage.acknowledge() 手动签收
3.Session.DUPS_OK_ACKNOWLEDGE 不是必须签收,消息可能会重复发送。在第二次重新传送消息的时候,消息只有在被确认之后,才认为已经被成功地消费了。
package com.wn.fndy; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import javax.jms.*; //消费者 public class TopReceiver { private static String BROKERURL = "tcp://127.0.0.1:61616"; private static String TOPIC = "my-topic"; public static void main(String[] args) throws JMSException { start(); } private static void start() throws JMSException { System.out.println("消费者启动......"); // 创建ActiveMQConnectionFactory 会话工厂 ActiveMQConnectionFactory activeMQConnectionFactory = new ActiveMQConnectionFactory( ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKERURL); Connection connection = activeMQConnectionFactory.createConnection(); // 启动JMS 连接 connection.start(); // 不开消息启事物,消息主要发送消费者,则表示消息已经签收 Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // 创建一个队列 Topic topic = session.createTopic(TOPIC); MessageConsumer consumer = session.createConsumer(topic); // consumer.setMessageListener(new MsgListener()); while (true) { TextMessage textMessage = (TextMessage) consumer.receive(); if (textMessage != null) { System.out.println("接受到消息:" + textMessage.getText()); // textMessage.acknowledge();// 手动签收 // session.commit(); } else { break; } } connection.close(); } }
package com.wn.fndy; import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import javax.jms.*; //生产方 public class TOPSend { // tcp 地址 public static final String BROKERURL = "tcp://localhost:61616"; // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp public static final String TOPIC = "my-topic"; public static void main(String[] args) throws JMSException { start(); } private static void start() throws JMSException { System.out.println("生产者已经启动......"); //创建ActiveMQConnectionFactory会话工厂 ActiveMQConnectionFactory activeMQConnectionFactory=new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKERURL); Connection connection = activeMQConnectionFactory.createConnection(); //启动JMS连接 connection.start(); Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); MessageProducer producer = session.createProducer(null); producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); send(producer,session); System.out.println("发送成功!"); connection.close(); } private static void send(MessageProducer producer, Session session) throws JMSException { for (int i=1;i<=5;i++){ System.out.println("我是消息"+i); TextMessage textMessage = session.createTextMessage("我是消息" + i); Destination destination = session.createTopic(TOPIC); producer.send(destination,textMessage); } } }
3.1 启动两个消费者,因为只有消费者先订阅,生产者才会发送消息,消费者才能接收消息;(发布/订阅是一个发送者,对应多个消费者)
3.2 启动生产者
查看一个控制台中两个消费者的情况
标签:pid cte tcp connect enc ups apach package throw
原文地址:https://www.cnblogs.com/mayuan01/p/12391357.html