原文出自:http://www.tkk7.com/xmatthew/archive/2008/11/02/238208.html 作者:xmatthew
Spring2 針對(duì)遠(yuǎn)程訪問(wèn)服務(wù),提供的一個(gè)remote包。其的的是提供一套統(tǒng)一的遠(yuǎn)程服務(wù)發(fā)布功能。
先來(lái)看一下Spring2支持那些遠(yuǎn)程服務(wù)功能:
1. RMI服務(wù)
2. Hessian或者Burlap通過(guò)HTTP遠(yuǎn)程調(diào)用服務(wù)
3. HTTP調(diào)用器暴露服務(wù)
下面用一個(gè)例子,來(lái)看一下Spring2 是怎樣對(duì)這些服務(wù)進(jìn)行統(tǒng)一的封裝和管理。
先看一下服務(wù)器端的源代碼
public interface IBookService {
Book getById(String id);
}
public class Book {
public String name;
public String id;
public String author;
}
public class BookService implements IBookService {
public Book getById(String id) {
return BookStore.getById(id);
}
}
客戶端源代碼
public class BookQueryService {
private IBookService bookService;
public void setAccountService(IBookService bookService) {
this.bookService = bookService;
}
public Book getBookById(String id) {
return bookService.getById(id);
}
}
//客戶端調(diào)用示例
public static void main(String[] args) {
ClassPathXmlApplicationContext context;
context = new ClassPathXmlApplicationContext("applicationContext.xml");
BookQueryService bookQueryService = (BookQueryService) context.getBean("bookQueryService");
Book book = bookQueryService.getBookById("1");
}
使用Spring2 發(fā)布 RMI服務(wù)示例
服務(wù)器端配置:
<bean id="bookService" class="com.xmatthew.spring.remote.BookService">
</bean>
<bean class="org.springframework.remoting.rmi.RmiServiceExporter">
<!-- does not necessarily have to be the same name as the bean to be exported -->
<property name="serviceName" value="bookService"/>
<property name="service" ref="bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
<property name="registryPort" value="1800"/>
</bean>
客戶端配置:
<bean class="com.xmatthew.spring.remote.client.BookQueryService">
<property name="bookService" ref="bookService"/>
</bean>
<bean id="bookService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">
<property name="serviceUrl" value="rmi://localhost:1800/bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
</bean>
使用Spring2 發(fā)布 基于Http的Hessian服務(wù)示例
注: Hessian提供一種基于HTTP的二進(jìn)制遠(yuǎn)程協(xié)議。它是由Caucho創(chuàng)建的,可以在 http://www.caucho.com 找到更多有關(guān)Hessian的信息。
首為使用Hessian,需要為其配置Spring 的 DispatcherServlet
把下面的配置加入到web.xml中
<servlet>
<servlet-name>remoting</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>remoting</servlet-name>
<url-pattern>/remoting/*</url-pattern>
</servlet-mapping>
服務(wù)器端配置:
<bean id="bookService" class="com.xmatthew.spring.remote.BookService">
</bean>
<bean name="/bookService" class="org.springframework.remoting.caucho.HessianServiceExporter">
<property name="service" ref="bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
</bean>
客戶端配置:
<bean class="com.xmatthew.spring.remote.client.BookQueryService">
<property name="bookService" ref="bookService"/>
</bean>
<bean id="bookService" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:8080/bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
</bean>
使用Spring2 發(fā)布 基于Http的Burlap服務(wù)示例
Burlap,它是一個(gè)基于XML的Hessian替代方案。它的配置方法和上述Hessian的一樣。只要把 Hessian 換成 Burlap 就行了。
服務(wù)器端使用:
org.springframework.remoting.caucho.BurlapServiceExporter 發(fā)布服務(wù)
客戶端使用:
org.springframework.remoting.caucho.BurlapProxyFactoryBean
使用Spring2 發(fā)布 基于HTTP調(diào)用器暴露服務(wù)
和使用自身序列化機(jī)制的輕量級(jí)協(xié)議Burlap和Hessian相反,Spring HTTP調(diào)用器使用標(biāo)準(zhǔn)Java序列化機(jī)制來(lái)通過(guò)HTTP暴露業(yè)務(wù).
但其配置與Burlap和Hessian很相近
服務(wù)器端配置:
<bean id="bookService" class="com.xmatthew.spring.remote.BookService">
</bean>
<bean name="/bookService" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
<property name="service" ref="bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
</bean>
客戶端配置:
<bean class="com.xmatthew.spring.remote.client.BookQueryService">
<property name="bookService" ref="bookService"/>
</bean>
<bean id="bookService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:8080/bookService"/>
<property name="serviceInterface" value="com.xmatthew.spring.remote.IBookService"/>
</bean>
posted on 2008-11-04 12:05
lvq810 閱讀(234)
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