spring实现远程方法调用

时间：2015-01-08 18:22:35 阅读：346 评论：0 收藏：0 [点我收藏+]

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spring in action一书的读书笔记

使用spring实现远程方法调用可以极大简化开发

将一个spring bean包装成为RMI service

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调用发布的RMI service

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我们也可以使用spring进行配置

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<bean id="spitterService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean" p:serviceUrl="rmi://localhost/SpitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

RMI有一个限制就是对防火墙不太友好，不容易穿过防火墙，这在局域网可以不用考虑，但是广域网就需要考虑这一点

Hessian,Burlap是Caucho科技提供的两种方法

Hessian基于二进制消息进行通信

Burlap基于xml格式消息进行通信

发布Hessian service

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<bean id="hessianSpitterService" class="org.springframework.remoting.caucho.HessianServiceExporter"
p:service-ref="spitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

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HessianServiceExporter在spring中是作为一个controller存在的，所以需要在web.xml(意味着必须是web项目)配置DispatcherServlet，将对Hessian service bean的请求映射到hessianSpitterService
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<value>
/spitter.service=hessianSpitterService
</value>
</property>
</bean>

调用发布的Hessian service

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

发布Burlap service

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<bean id="burlapSpitterService" class="org.springframework.remoting.caucho.BurlapServiceExporter"
p:service-ref="spitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

调用 Burlap service

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

RMI使用jdk中的类库，但是对防火墙不太友好，burlap和hessian对防火墙友好但是使用了第三方的类库,Spring‘s HttpInvoker解决了这两个矛盾。使用spring‘s httpInvoker双发必须都是用spring

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<bean class="org.spring.framework.remoting.httpinvoker.HttpInvokerServiceExporter"
p:service-ref="spitterService"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>
HttpInvokerServiceExporter在spring中也是作为一个controller
调用HttpInvoker service
<bean id="spitterService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean"
p:serviceUrl="http://localhost:8080/Spitter/spitter.service"
p:serviceInterface="com.habuma.spitter.service.SpitterService"/>

技术分享

几种方式使用方法大体相同，只是使用的spring中的类不同

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原文地址：http://my.oschina.net/004/blog/365136

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