远程服务

proxy:将远程方法调用序列化和反序列化

1. 创建 service

2. 创建bean到beanfactory

3. RmiServiceExporter可以将bean export为RMI service，通过把bean包装在设配器中，适配器被绑定在RMI注册表中。

RMI是基于java的，客户端和sever端都需要使用java编写。

public interfaceSpitterService{
List<Spittle>getRecentSpittles(intcount);
void saveSpittle(Spittlespittle);
void saveSpitter(Spitterspitter);
...
}

<bean class="org.springframework.remoting.rmi.RmiServiceExporter"
p:service-ref="spitterService"
p:serviceName="SpitterService" //注册的RMI service名称
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>
或者使用
<bean class="org.springframework.remoting.rmi.RmiServiceExporter"
p:service-ref="spitterService"
p:serviceName="SpitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

 访问service

<bean id="spitterService"
class="org.springframework.remoting.rmi.RmiProxyFactoryBean"
p:serviceUrl="rmi://localhost/SpitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/> //这个服务实现的接口

//Then you can invoke methods on it as if it were a local bean:
public List<Spittle>getSpittles(StringuserName){
    Spitterspitter=spitterService.getSpitter(userName);
    return spitterService.getSpittlesForSpitter(spitter);
}

 

 

使用Hessian and Burlap的远程调用，

二者唯一不同的是Hessian的消息是二进制的，而Burlap是xml的。

和spring类似，HessianServiceExporter 代替RmiServiceExporter，相当于MVC中的controller，不需要注册表

 

<bean id="spitterService"
      class="org.springframework.remoting.caucho.BurlapProxyFactoryBean"
      p:serviceUrl="http://localhost:8080/Spitter/spitter.service"
      p:serviceInterface="com.habuma.spitter.service.SpitterService" />

<bean id="hessianSpitterService"
class="org.springframework.remoting.caucho.HessianServiceExporter"
//不需要service-name,因为不需要注册表
p:service-ref="spitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>
//是controller，需要dispatcherservelet 和 url handler
<servlet-mapping>
<servlet-name>spitter</servlet-name>
<url-pattern>*.service</url-pattern>
</servlet-mapping>

<bean id="urlMapping"class=
"org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<propertyname="mappings">
<value>
/spitter.service=hessianSpitterService
</value>
</property>
</bean>

 

 spring 中的 HttpInvoker，用法和以上相同。

 

<bean class=
"org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"
p:service-ref="spitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

bean id="spitterService"class=
"org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean"
p:serviceUrl="http://localhost:8080/Spitter/spitter.service"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

 

参考资料：http://blog.163.com/sejin@126/blog/static/8275045520119894250357/