Queue与Topic比较
发送消息
java
public class Sender{
public static void main(String[] args){
Sender sender = new Sender();
String msg = "Hello World!";
sender.sendMessage(msg);
System.out.println("发送消息结束：" + msg);
}
public void sendMessage(String msg){
String user = ActiveMQConnection.DEFAULT_USER;
String password = ActiveMQConnection.DEFAULT_PASSWORD;
String url = AcbiveMQConnection.DEFAULT_BROKER_URL;
String subject = "TOOL.DEFAULT";
//1.初始化连接工厂
ConnectionFactory contectionFactory = new ActiveMQConnectionFactory(user, password, url);
try{
//2.创建连接
Connection connection = contectionFactory.createConnection();
connection.start();
//3.创建会话
Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
//4.打开队列
Destination destination = session.createQueue(subject);
//5. MessageProducer负责发送消息
MessageProducer producer = session.createProducer(destination);
TextMessage message = session.createTextMessage();
for(int i = 0;i < 10;i++){
String tmp = i + ":" + msg;
message.setStringProperty("hello",tmp);
//6.发送消息
producer.send(message);
System.out.println("send:" + tmp);
Thread.sleep(3000);
//只有在commit之后，消息才会进入队列
session.commit();
//7.关闭会话和连接
session.close();
conneciton.close();
}
}catch(JMSException e){
e.printStackTrace();
}catch(InterruptedException e){
e.printStackTrace();
}
}
}通过Queue接收消息
java
public class Receiver{
public static void main(String[] args){
String user = ActiveMQConnection.DEFAULT_USER;
String password = ActiveMQConnection.DEFAULT_PASSWORD;
String url = ActiveMQConnection.DEFAULT_BROKER_URL;
String subject = "TOOL.DEFAULT";
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(user, password, url);
Connection connection;
try{
connection = connectionFactory.createConnection();
connection.start();
final Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
Destination destination = session.createQueue(subject);
// MessageConsumer负责接受消息
MessageConsumer consumer = session.createConsumer(destination);
consumer.setMessageListener(new MessageListener(){
public void onMessage(Message msg){
TextMessage message = (TextMessage)msg;
try{
String hello = message.getStringProperty("hello");
System.out.println("收到消息：\t" + hello);
session.commit();
}catch(JMSException e){
e.printStackTrace();
}
}
});
session.close();
connection.close();
}catch(JMSException e){
e.printStackTrace();
}
}
}通过Topic发布消息
java
public class Publisher{
public static void main(String[] args){
Publisher pb = new Publisher();
String msg = "Hello World!~~~~~";
pb.sendMessage(msg);
System.out.println("发送消息结束：" + msg);
}
public void sendMessage(String msg){
String user = ActiveMQConnection.DEFAULT_USER;
String password = ActiveMQConnection.DEFAULT_PASSWORD;
String url = ActiveMQConnection.DEFAULT_BROKER_URL;
String subject = "MQ.TOPIC";
ConnectionFactory contectionFactory = new ActiveMQConnectionFactory(user, password, url);
try{
Connection connection = contectionFactory.createConnection();
connection.start();
Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
//创建要发布的主题，和Queue的区别就在此
Destination destination = session.createTopic(subject);
MessageProducer producer = session.createProducer(destination);
TextMessage message = session.createTextMessage();
message.setStringProperty("hello", msg);
producer.send(message);//发送消息
session.commit();
session.close();
connection.close();
}catch(JMSException e){
e.printStackTrace();
}
}
}通过Topic订阅消息
java
public class Subscriber{
public static void main(String[] args){
String user = ActiveMQConnection.DEFAULT_USER;
String password = ActiveMQConnection.DEFAULT_PASSWORD;
String url = ActiveMQConnection.DEFAULT_BROKER_URL;
String subject = "MQ.TOPIC";
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(user, password, url);
Connection connection;
try{
connection = connectionFactory.createConnection();
connection.start();
final Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
Topic topic = session.createTopic(subject);
// MessageConsumer负责接受消息
MessageConsumer consumer = session.createConsumer(topic);
consumer.setMessageListener(new MessageListener(){
public void onMessage(Message msg) {
TextMessage message = (TextMessage) msg;
try {
String hello = message.getStringProperty("hello");
System.out.println("订阅者---SecondSubscriber---收到消息：\t" + hello);
session.commit();
} catch (JMSException e) {
e.printStackTrace();
}
}
});
session.close();
connection.close();
}catch(JMSException e){
e.printStackTrace();
}
}
}Spring JMS收发消息
一、依赖
xml
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-all</artifactId>
<version>5.11.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.4.RELEASE</version>
</dependency> 二、队列（Queue）消息的收发
点对点消息，如果没有消费者在监听队列，消息将保留在队列中，直至消息消费者连接到队列为止。
在此模型中，消息不是自动推动给消息消费者的，而是要由消息消费者从队列中请求获得（拉模式）
①、配置文件
xml
<?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.xsd">
<!-- 配置JMS连接工厂 -->
<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="failover:(tcp://localhost:61616)" />
</bean>
<!-- 定义消息队列（Queue） -->
<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
<!-- 设置消息队列的名字 -->
<constructor-arg>
<value>queue1</value>
</constructor-arg>
</bean>
<!-- 配置JMS模板（Queue），Spring提供的JMS工具类，它发送、接收消息。 -->
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<property name="connectionFactory" ref="connectionFactory" />
<property name="defaultDestination" ref="queueDestination" />
<property name="receiveTimeout" value="10000" />
</bean>
<!--queue消息生产者 -->
<bean id="producerService" class="com.yoodb.mq.queue.ProducerServiceImpl">
<property name="jmsTemplate" ref="jmsTemplate"></property>
</bean>
<!--queue消息消费者 -->
<bean id="consumerService" class="com.yoodb.mq.queue.ConsumerServiceImpl">
<property name="jmsTemplate" ref="jmsTemplate"></property>
</bean>
</beans>②、消息生产者
java
public class ProducerServiceImpl implements ProducerService{
private JmsTemplate jmsTemplate;
//向指定队列发送消息
public void sendMessage(Destination destination,final Stringmsg){
System.out.println("向队列" + destination.toString() + "发送了消息___" + msg);
jmsTemplate.send(destination,new MessageCreator(){
public Message createMessage(Session session)throws JMSException{
return session.createTextMessage(msg);
}
});
}
//向默认队列发送消息
publc void sendMessage(final String msg){
String destination = jmsTemplate.getDefaultDestination().toString();
System.out.println("向队列" +destination+ "发送了消息___" + msg);
jmsTemplate.send(new MessageCreator(){
public Message createMesssage(Session session)throws JMSException{
return session.createTextMessage(msg);
}
});
}
public void setJmsTemplate(JmsTemplate jmsTemplate){
this.jmsTemplate = jmsTemplate;
}
}③、消息消费者代码
java
public class ConsumerServiceImpl implements ConsumerService{
private JmsTemplate jsmTemplate;
//接收消息
public void receive(Destination destination){
TextMessage tm = (TextMessage)jmsTemplate.receive(destination);
try{
System.out.println("从队列" + destination.toString() + "收到消息" + tm.getText());
}catch(JMSException e){
e.printStackTrace();
}
}
public void setJmsTemplate(JmsTemplate jmsTemplate){
this.jmsTemplate = jmsTemplate;
}
}队列消息监听，在接受消息的时候，可以不用消息消费者代码的方式，Spring JMS同样提供了消息监听的模式，对应的配置和代码内容。
xml
<!-- 定义消息队列（Queue），我们监听一个新的队列，queue2 -->
<bean id="queueDestination2" class="org.apache.activemq.command.ActiveMQQueue">
<!-- 设置消息队列的名字 -->
<constructor-arg>
<value>queue2</value>
</constructor-arg>
</bean>
<!-- 配置消息队列监听者（Queue），代码下面给出，只有一个onMessage方法 -->
<bean id="queueMessageListener" class="com.yoodb.mq.queue.QueueMessageListener" />
<!-- 消息监听容器（Queue），配置连接工厂，监听的队列是queue2，监听器是上面定义的监听器 -->
<bean id="jmsContainer"
class="org.springframework.jms.listener.DefaultMessageListenerContainer">
<property name="connectionFactory" ref="connectionFactory" />
<property name="destination" ref="queueDestination2" />
<property name="messageListener" ref="queueMessageListener" />
</bean>
java
public class QueueMessageListener implements MessageListener{
//当收到信息时，自动调用该方法
public void onMessage(Message message){
TextMessage tm = (TextMessage) message;
try{
System.out.println("ConsumerMessageListener收到了文本消息：\t"
+ tm.getText());
}catch(JMSException e){
e.printStackTrace();
}
}
}三、主题（Topic）消息收发
使用Spring JMS的时候，主题[订阅/发布]（Topic）和队列消息模式的主要差异体现在JmsTemplate中"pubSubDomain"是否设置为True
如果为True，则是Topic；如果是false或者默认，则是Queue
①、配置文件
xml
<!-- 定义消息主题（Topic） -->
<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
<constructor-arg>
<value>guo_topic</value>
</constructor-arg>
</bean>
<!-- 配置JMS模板（Topic），pubSubDomain="true"-->
<bean id="topicJmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<property name="connectionFactory" ref="connectionFactory" />
<property name="defaultDestination" ref="topicDestination" />
<property name="pubSubDomain" value="true" />
<property name="receiveTimeout" value="10000" />
</bean>
<!--topic消息发布者 -->
<bean id="topicProvider" class="com.yoodb.mq.topic.TopicProvider">
<property name="topicJmsTemplate" ref="topicJmsTemplate"></property>
</bean>
<!-- 消息主题监听者 和 主题监听容器 可以配置多个，即多个订阅者 -->
<!-- 消息主题监听者(Topic) -->
<bean id="topicMessageListener" class="com.yoodb.mq.topic.TopicMessageListener" />
<!-- 主题监听容器 （Topic） -->
<bean id="topicJmsContainer"
class="org.springframework.jms.listener.DefaultMessageListenerContainer">
<property name="connectionFactory" ref="connectionFactory" />
<property name="destination" ref="topicDestination" />
<property name="messageListener" ref="topicMessageListener" />
</bean>②、消息发布者
java
public class TopicProvider {
private JmsTemplate topicJmsTemplate;
/**
* 向指定的topic发布消息
*
* @param topic
* @param msg
*/
public void publish(final Destination topic, final String msg) {
topicJmsTemplate.send(topic, new MessageCreator() {
public Message createMessage(Session session) throws JMSException {
System.out.println("topic name 是" + topic.toString()
+ "，发布消息内容为:\t" + msg);
return session.createTextMessage(msg);
}
});
}
public void setTopicJmsTemplate(JmsTemplate topicJmsTemplate) {
this.topicJmsTemplate = topicJmsTemplate;
}
}③、消息订阅者（监听）
java
public class TopicMessageListener implements MessageListener {
public void onMessage(Message message) {
TextMessage tm = (TextMessage) message;
try {
System.out.println("TopicMessageListener \t" + tm.getText());
} catch (JMSException e) {
e.printStackTrace();
}
}
}测试代码
java
/**
* 测试Spring JMS
*
* 1.测试生产者发送消息
*
* 2. 测试消费者接受消息
*
* 3. 测试消息监听
*
* 4.测试主题监听
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
// ApplicationContext context = new
// ClassPathXmlApplicationContext("applicationContext.xml");
@ContextConfiguration("/applicationContext.xml")
public class SpringJmsTest {
/**
* 队列名queue1
*/
@Autowired
private Destination queueDestination;
/**
* 队列名queue2
*/
@Autowired
private Destination queueDestination2;
/**
* 主题 guo_topic
*/
@Autowired
@Qualifier("topicDestination")
private Destination topic;
/**
* 主题消息发布者
*/
@Autowired
private TopicProvider topicProvider;
/**
* 队列消息生产者
*/
@Autowired
@Qualifier("producerService")
private ProducerService producer;
/**
* 队列消息生产者
*/
@Autowired
@Qualifier("consumerService")
private ConsumerService consumer;
/**
* 测试生产者向queue1发送消息
*/
@Test
public void testProduce() {
String msg = "Hello world!";
producer.sendMessage(msg);
}
/**
* 测试消费者从queue1接受消息
*/
@Test
public void testConsume() {
consumer.receive(queueDestination);
}
/**
* 测试消息监听
*
* 1.生产者向队列queue2发送消息
*
* 2.ConsumerMessageListener监听队列，并消费消息
*/
@Test
public void testSend() {
producer.sendMessage(queueDestination2, "Hello China!!!");
}
/**
* 测试主题监听
* 1.生产者向主题发布消息
* 2.ConsumerMessageListener监听主题，并消费消息
*/
@Test
public void testTopic() throws Exception {
topicProvider.publish(topic, "Hello T-To-Top-Topi-Topic!");
}
}