MS 定義了兩種方式:Quere(點對點);Topic(發佈/訂閱)。
ConnectionFactory 是連接工廠,負責創建Connection。
Connection 負責創建 Session。
Session 創建 MessageProducer(用來發消息) 和 MessageConsumer(用來接收消息)。
Destination 是消息的目的地。
下載 apache-activemq-5.3.0。http://activemq.apache.org/download.html,解壓,
然後雙擊 bin/activemq.bat。運行後,可以在 http://localhost:8161/admin 觀察。
也有 demo, http://localhost:8161/demo。把 activemq-all-5.3.0.jar 加入 classpath。
一 ActiveMQ的jms寫法
1 消息發送類
- public class JMSsenderBean {
- public static void main(String[] args) throws Exception {
- //連接工廠。連接工廠(ConnectionFactory)是由管理員創建,並綁定到JNDI樹中。客戶端使用JNDI查找連接工廠,然後利用連接工廠創建一個JMS連接。
- ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
- // JMS連接。JMS連接(Connection)表示JMS客戶端和服務器端之間的一個活動的連接,是由客戶端通過調用連接工廠的方法建立的
- Connection connection = connectionFactory.createConnection();
- //開啓連接
- connection.start();
- Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
- Destination destination = session.createQueue("my-queue");
- MessageProducer producer = session.createProducer(destination);
- for(int i=0; i<3; i++) {
- MapMessage message = session.createMapMessage();
- message.setLong("count", new Date().getTime());
- Thread.sleep(1000);
- //通過消息生產者發出消息
- producer.send(message);
- }
- session.commit();
- session.close();
- connection.close();
- }
- }
2 消息接收類
- import javax.jms.Connection;
- import javax.jms.ConnectionFactory;
- import javax.jms.Destination;
- import javax.jms.MapMessage;
- import javax.jms.MessageConsumer;
- import javax.jms.Session;
- import org.apache.activemq.ActiveMQConnectionFactory;
- //消息接收類
- public class JMSreceive {
- public static void main(String[] args) throws Exception {
- ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
- Connection connection = connectionFactory.createConnection();
- connection.start();
- final Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
- Destination destination = session.createQueue("my-queue");
- MessageConsumer consumer = session.createConsumer(destination);
- /*//listener 方式
- consumer.setMessageListener(new MessageListener() {
- public void onMessage(Message msg) {
- MapMessage message = (MapMessage) msg;
- //TODO something....
- System.out.println("收到消息:" + new Date(message.getLong("count")));
- session.commit();
- }
- });
- Thread.sleep(30000);
- */
- int i=0;
- while(i<3) {
- i++;
- MapMessage message = (MapMessage) consumer.receive();
- session.commit();
- System.out.println("收到消息:" + new Date(message.getLong("count")));
- }
- session.close();
- connection.close();
- }
- }
二 spring集成
1 spring 配置文件
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
- <!-- 在非 web / ejb 容器中使用 pool 時,要手動 stop,spring 不會爲你執行 destroy-method 的方法
- <bean id="jmsFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop">
- <property name="connectionFactory">
- <bean class="org.apache.activemq.ActiveMQConnectionFactory">
- <property name="brokerURL" value="tcp://localhost:61616" />
- </bean>
- </property>
- </bean>
- -->
- <bean id="jmsFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
- <property name="brokerURL" value="tcp://localhost:61616" />
- </bean>
- <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue">
- <constructor-arg index="0" value="my-queue" />
- </bean>
- <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
- <property name="connectionFactory" ref="jmsFactory" />
- <property name="defaultDestination" ref="destination" />
- <property name="messageConverter">
- <bean class="org.springframework.jms.support.converter.SimpleMessageConverter" />
- </property>
- </bean>
- </beans>
2 消息發送類
- import java.util.Date;
- import javax.jms.JMSException;
- import javax.jms.MapMessage;
- import javax.jms.Session;
- import javax.mail.Message;
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.support.FileSystemXmlApplicationContext;
- import org.springframework.jms.core.JmsTemplate;
- import org.springframework.jms.core.MessageCreator;
- public class JMSsenderBean_Spring {
- public static void main(String[] args) {
- ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:spring/applicationContext-jmx.xml");
- JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate");
- jmsTemplate.send(new MessageCreator() {
- public MapMessage createMessage(Session session) throws JMSException {
- MapMessage mm = session.createMapMessage();
- mm.setLong("count", new Date().getTime());
- return mm;
- }
- });
- }
- }
3 消息接收類
- import java.util.Date;
- import java.util.Map;
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.support.FileSystemXmlApplicationContext;
- import org.springframework.jms.core.JmsTemplate;
- public class JMSreceive_Spring {
- public static void main(String[] args) {
- ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:spring/applicationContext-jmx.xml");
- JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate");
- while(true) {
- Map<String, Object> mm = (Map<String, Object>) jmsTemplate.receiveAndConvert();
- System.out.println("收到消息:" + new Date((Long)mm.get("count")));
- }
- }
- }