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/