ConnectionFactory是用於產生到JMS伺服器的鏈接的,Spring為我們提供了多個ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory。SingleConnectionFactory對於建立JMS伺服器鏈... ...
一、與spring整合實現ptp的同步接收消息
pom.xml:
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jms --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>4.3.7.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.activemq/activemq-pool --> <dependency> <groupId>org.apache.activemq</groupId> <artifactId>activemq-pool</artifactId> <version>5.9.0</version> </dependency>
spring-jms.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" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中負責創建到ActiveMQ連接的工廠類 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 創建連接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring為我們提供了多個ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- Spring提供的JMS工具類,它可以進行消息發送、接收等 --> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <!-- 這個connectionFactory對應的是我們定義的Spring提供的那個ConnectionFactory對象 --> <property name="connectionFactory" ref="cachingConnectionFactory"/> </bean> <!--這個是隊列目的地,點對點的--> <bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue"> <constructor-arg index="0" value="spring-queue"/> </bean> </beans>
ConnectionFactory是用於產生到JMS伺服器的鏈接的,Spring為我們提供了多個ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory。SingleConnectionFactory對於建立JMS伺服器鏈接的請求會一直返回同一個鏈接,並且會忽略Connection的close方法調用。CachingConnectionFactory繼承了SingleConnectionFactory,所以它擁有SingleConnectionFactory的所有功能,同時它還新增了緩存功能,它可以緩存Session、MessageProducer和MessageConsumer。這裡我們使用CachingConnectionFactory來作為示例。
消息生產者:
package com.jalja.org.jms.spring; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.Session; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; import org.springframework.jms.core.MessageCreator; public class SpringJmsSend { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); jmsTemplate.send(queueDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS"); } }); } }
消費者:
package com.jalja.org.jms.spring; import javax.jms.Destination; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; public class SpringJmsReceive { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); String msg=(String) jmsTemplate.receiveAndConvert(queueDestination); System.out.println(msg); } }
二、PTP的非同步調用
我們在spring中直接配置非同步接收消息的監聽器,這樣就相當於在spring中配置了消費者,在接受消息的時候就不必要啟動消費者了。
spring-jms.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" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中負責創建到ActiveMQ連接的工廠類 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 創建連接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring為我們提供了多個ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- Spring提供的JMS工具類,它可以進行消息發送、接收等 --> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <!-- 這個connectionFactory對應的是我們定義的Spring提供的那個ConnectionFactory對象 --> <property name="connectionFactory" ref="cachingConnectionFactory"/> </bean> <!--這個是隊列目的地,點對點的--> <bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue"> <constructor-arg index="0" value="spring-queue"/> </bean> <!-- 消息監聽器 --> <bean id="myMessageListener" class="com.jalja.org.jms.spring.yb.MyMessageListener"/> <!-- 消息監聽容器 --> <bean id="jmsContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="cachingConnectionFactory" /> <property name="destination" ref="queueDestination" /> <property name="messageListener" ref="myMessageListener" /> </bean> </beans>
生產者往指定目的地Destination發送消息後,接下來就是消費者對指定目的地的消息進行消費了。那麼消費者是如何知道有生產者發送消息到指定目的地Destination了呢?這是通過Spring為我們封裝的消息監聽容器MessageListenerContainer實現的,它負責接收信息,並把接收到的信息分發給真正的MessageListener進行處理。每個消費者對應每個目的地都需要有對應的MessageListenerContainer。對於消息監聽容器而言,除了要知道監聽哪個目的地之外,還需要知道到哪裡去監聽,也就是說它還需要知道去監聽哪個JMS伺服器,這是通過在配置MessageConnectionFactory的時候往裡面註入一個ConnectionFactory來實現的。所以我們在配置一個MessageListenerContainer的時候有三個屬性必須指定,一個是表示從哪裡監聽的ConnectionFactory;一個是表示監聽什麼的Destination;一個是接收到消息以後進行消息處理的MessageListener。Spring一共為我們提供了兩種類型的MessageListenerContainer,SimpleMessageListenerContainer和DefaultMessageListenerContainer。
SimpleMessageListenerContainer:SimpleMessageListenerContainer會在一開始的時候就創建一個會話session和消費者Consumer,並且會使用標準的JMS MessageConsumer.setMessageListener()方法註冊監聽器讓JMS提供者調用監聽器的回調函數。它不會動態的適應運行時需要和參與外部的事務管理。相容性方面,它非常接近於獨立的JMS規範,但一般不相容Java EE的JMS限制。
DefaultMessageListenerContainer:在大多數情況下我們還是使用的DefaultMessageListenerContainer,跟SimpleMessageListenerContainer相比,DefaultMessageListenerContainer會動態的適應運行時需要,並且能夠參與外部的事務管理。它很好的平衡了對JMS提供者要求低、先進功能如事務參與和相容Java EE環境。
消息生產者:
public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); System.out.println("非同步調用執行開始"); jmsTemplate.send(queueDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS"); } }); System.out.println("非同步調用執行結束"); }
消息監聽器:MyMessageListener
public class MyMessageListener implements MessageListener{ @Override public void onMessage(Message message) { TextMessage msg= (TextMessage) message; try { System.out.println("你好:"+msg.getText()); } catch (JMSException e) { e.printStackTrace(); } } }
啟動消息生產者 監聽器的執行結果是:
非同步調用執行開始
非同步調用執行結束
你好:Hello spring JMS
三、發佈訂閱 同步接收
spring-jms.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" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中負責創建到ActiveMQ連接的工廠類 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 創建連接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring為我們提供了多個ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- Spring提供的JMS工具類,它可以進行消息發送、接收等 --> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <!-- 這個connectionFactory對應的是我們定義的Spring提供的那個ConnectionFactory對象 --> <property name="connectionFactory" ref="cachingConnectionFactory"/> </bean> <!--這個是隊列目的地,發佈訂閱--> <bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic"> <constructor-arg index="0" value="spring-Topic"/> </bean> </beans>
生產者:
public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination topicDestination=(Destination) context.getBean("topicDestination"); jmsTemplate.send(topicDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS topicDestination"); } }); }
消費者:
public class SpringJmsSubscriber { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination topicDestination=(Destination) context.getBean("topicDestination"); String msg=(String) jmsTemplate.receiveAndConvert(topicDestination); System.out.println(msg); } }