[CXF] Server与Client实现方式四：JMS

【参考：http://cxf.apache.org/docs/jms-transport.html 】

【参考：http://cxf.apache.org/docs/using-the-jmsconfigfeature.html 】

【参考：http://cxf.apache.org/scalable-cxf-applications-using-jms-transport.html 】

前面三节介绍的Server与Client之间的通信方式都是基于HTTP，这节介绍怎么将CXF的服务发布在JMS上，通过发送、接收JMS消息来调用服务。

 

一、启动JMS Broker

要使用JMS，首先需要有一个JMS服务器，这里我使用Apache ActiveMQ作为JMS的服务器，可以从网上下载，也可以通过执行代码的方式启动，例如：

		BrokerService bs = new BrokerService();
		bs.setPersistenceAdapter(new MemoryPersistenceAdapter());
		bs.addConnector("tcp://localhost:61616");
		bs.start();
		System.out.println("jms broker started");

 

上面启动一个ActiveMQ的broker，地址为tcp://localhost:61616，并且消息存储在内存里。

 

二、定义服务接口

这个和前面介绍的内容差不多，服务接口定义如下：

@WebService(targetNamespace="http://localhost:8080/cxf/jms")
public interface OrderProcess {

	@WebMethod(operationName="processOrder")
	public String processOrder( @WebParam(name="order") Order order);
	
}

 

三、发布服务

之前所有的服务都是以缺省的http协议发布的，这里要使用jms协议，就需要让CXF知道，这是通过一个JMSConfigFeature来实现的，如下：

		//basic setting on service
		JaxWsServerFactoryBean jwfb = new JaxWsServerFactoryBean();
		jwfb.setServiceClass(OrderProcess.class);
		jwfb.setServiceBean(new OrderProcessImpl());
		jwfb.setAddress("jms://"); //specify jms transport
		
		//create jms connection factory
		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
		connectionFactory.setBrokerURL("tcp://localhost:61616");
		
		//set target destination queue
		JMSConfiguration jmsConfig = new JMSConfiguration();
		jmsConfig.setTargetDestination("cxf.orderprocess.queue");
		jmsConfig.setConnectionFactory(connectionFactory);
		
		//add feature
		JMSConfigFeature jmsFeature = new JMSConfigFeature();
		jmsFeature.setJmsConfig(jmsConfig);
		jwfb.getFeatures().add(jmsFeature);
		
		//create
		jwfb.create();

 

首先需要指定服务接口和实现类；接下来在address变量里，需要指定的值为"jms://"开头的值，以告知cxf这里使用jms的传输协议。

然后就是普通的jms连接和配置的创建过程：指定broker的url和目标queue，接下来创建一个JMSConfigFeature,  设置它的jms配置信息，最后作为feature添加。这样这个服务就准备就诸，等待请求了。

 

Spring版本：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
	   http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

	<import resource="classpath:META-INF/cxf/cxf.xml" />
	<import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />
	<import resource="classpath:META-INF/cxf/cxf-servlet.xml" />

	<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<property name="brokerURL" value="tcp://localhost:61616" />
	</bean>

	<bean id="jmsConfig" class="org.apache.cxf.transport.jms.JMSConfiguration">
		<property name="connectionFactory" ref="connectionFactory" />
		<property name="targetDestination" value="cxf.orderprocess.queue" />
	</bean>

	<jaxws:endpoint id="orderProcess"
		implementor="com.liulutu.liugang.jms.OrderProcessImpl" address="jms://">
		<jaxws:features>
			<bean class="org.apache.cxf.transport.jms.JMSConfigFeature">
				<property name="jmsConfig" ref="jmsConfig" />
			</bean>
		</jaxws:features>
	</jaxws:endpoint>
</beans>

 

四、请求服务

显然和创建服务过程一样，需要配置client的jms信息，以将请求消息发送到jms服务器上，供服务端消费：

		//create jms connection and configuration
		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
		connectionFactory.setBrokerURL("tcp://localhost:61616");

		JMSConfiguration jmsConfig = new JMSConfiguration();
		jmsConfig.setTargetDestination("cxf.orderprocess.queue");
		jmsConfig.setConnectionFactory(connectionFactory);

		//create feature and config it with jms configuration
		JMSConfigFeature jmsFeature = new JMSConfigFeature();
		jmsFeature.setJmsConfig(jmsConfig);

		//create client, and add the feature
		JaxWsProxyFactoryBean client = new JaxWsProxyFactoryBean();
		client.setAddress("jms://"); //specify tranport type
		client.getFeatures().add(jmsFeature);
		
		//call service
		OrderProcess orderProcess = client.create(OrderProcess.class);
		String s = orderProcess.processOrder(order);
		System.out.println(s);

 

可以看出，无论Server还是Client端，关键步骤都在于添加JMSConfigFeature，并且设置它所需的jms连接信息。

 

Spring版本：

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
	   http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

	<import resource="classpath:META-INF/cxf/cxf.xml" />
	<import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />
	<import resource="classpath:META-INF/cxf/cxf-servlet.xml" />

	<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<property name="brokerURL" value="tcp://localhost:61616" />
	</bean>

	<bean id="jmsConfig" class="org.apache.cxf.transport.jms.JMSConfiguration">
		<property name="connectionFactory" ref="connectionFactory" />
		<property name="targetDestination" value="cxf.orderprocess.queue" />
	</bean>

	<jaxws:client id="orderProcessClient" serviceClass="com.liulutu.liugang.jms.OrderProcess"
		address="jms://">
		<jaxws:features>
			<bean class="org.apache.cxf.transport.jms.JMSConfigFeature">
				<property name="jmsConfig" ref="jmsConfig" />
			</bean>
		</jaxws:features>
	</jaxws:client>
</beans>

 

然后在代码里：

		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("/org/talend/esb/liugang/jms/client.xml");
		OrderProcess bean = context.getBean("orderProcessClient", OrderProcess.class);
		Order order = new Order();
		order.setId("hello");
		String processOrder = bean.processOrder(order);
		System.out.println(processOrder);