JMS-based RPC

Now try sending messages between applications through JMS.
Let's take a look at the RPC solution provided by spring (in fact there are other solutions, but we have never seen anyone using it ).
You need to use these two classes:
· Org. springframework. JMS. remoting. jmsinvokerserviceexporter exports beans as message-based services.
· Org. springframework. JMS. remoting. jmsinvokerproxyfactorybean allows the client to call the service

 

Compare jmsinvokerserviceexporter and rmiserviceexporter:

 

package pac.testcase.jms;public interface JmsRmiService {    String doServe(String requestedNum);}

 

package pac.testcase.jms;import org.springframework.stereotype.Service;@Servicepublic class JmsRmiServiceImpl implements JmsRmiService {                                                                                                                                                         public String doServe(String content) {        System.out.println(content.concat(" has been requested!!"));        return "your message::".concat(content).concat(":::length:")+content.length();    }}

 

Declare this pojo as a service and configure it in the spring configuration file:

<bean id="serverService" class="org.springframework.jms.remoting.JmsInvokerServiceExporter"    p:serviceInterface="pac.testcase.jms.JmsRmiService"    p:service-ref="JmsRmiServiceImpl"></bean>

 

Set it as a JMS listener. The configuration method is the same as that of jmsmessagelistener:

<amq:connectionFactory id="jmsFactory" /><jms:listener-container    destination-type="queue"    connection-factory="jmsFactory"    concurrency="3"    container-type="simple">    <jms:listener  destination="sparta" ref="serverService"  /></jms:listener-container>

 

Container-type has simple and default values. You can also use task-executor Based on Different types. Here we will record it briefly.

Start the JMS broker and then start it:

new ClassPathXmlApplicationContext("classpath:applicationContext-*.xml").getBean(JmsRmiService.class);

 

On the client side, I need a call proxy to help me call the interface, that is, jmsinvokerproxyfactorybean;
The configuration is as follows:

<amq:connectionFactory id="connectionFactory" /><bean id="clientService" class="org.springframework.jms.remoting.JmsInvokerProxyFactoryBean"    p:serviceInterface="pac.test.jms.SenderRmiService"    p:connectionFactory-ref="connectionFactory"    p:queueName="sparta"/>

The serviceinterface in the configuration is an interface created in the client based on the method to be called.

 

Try to call the main method:

Public static void main (string [] ARGs) {applicationcontext context = new classpathxmlapplicationcontext ("classpath: applicationcontext. XML "); senderrmiservice service = (senderrmiservice) context. getbean ("clientservice"); system. out. println (service. doserve ("this is Sparta !! "));}

 

Server output:

Client output:

JMS-based RPC