SpringHttpInvoker解析1-使用示例

HTTP invoker是一个新的远程调用模型，作为Spring框架的一部分，来执行基于HTTP的远程调用（让防火墙可以接受），并使用Java的序列化机制。

服务端

定义服务接口UserService

import java.util.List;
import com.gosun.jws.daomain.Users;
public interface UserService {
    public List<Users> geAlltUsers();
    public Users getUser(String id);
    public void save(Users user);
    public void saves(List<Users> users);
}  

服务接口实现类

import java.util.List;
import com.gosun.jws.daomain.Users;
import com.gosun.jws.daomain.UsersFactory;
public class UserServiceImpl implements UserService {
    @Override
    public List<Users> geAlltUsers() {
        return UsersFactory.getUsers();
    }
    @Override
    public Users getUser(String id) {
        System.out.println(id);
        return UsersFactory.getUser();
    }
    @Override
    public void save(Users user) {
        System.out.println(user.toJson());
    }
    @Override
    public void saves(List<Users> users) {
        for (Users u : users) {
            System.out.println(u.toJson());
        }
    }
}  

配置Spring的HttpInvokerServiceExporter和SimpleUrlHandlerMapping

<!-- 在Spring的httpInvoker服务 -->
<bean id="httpInvokerUserService"
    class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
    <!--需要发布的实现类 -->
    <property name="service" ref="userServiceHttpInvoker" />
    <property name="serviceInterface" value="com.gosun.jws.httpinvoker.UserService" />
</bean>
<!-- 将特定的请求映射到具体的hessianservice -->
<bean id="urlMapping1"
    class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <property name="mappings">
        <props>
            <prop key="/httpInvokerUserService.service">httpInvokerUserService</prop>
        </props>
    </property>
</bean>
<bean id="userServiceHttpInvoker" class="com.gosun.jws.httpinvoker.UserServiceImpl" />  

配置DispatcherServlet控制器

<servlet>
　　<servlet-name>dispatcherServlet</servlet-name>
　　<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
　　<init-param>
　　　　<param-name>contextConfigLocation</param-name>
　　　　<param-value>classpath:applicationContext-httpinvoker.xml</param-value>
　　</init-param>
</servlet>
<servlet-mapping>
　　<servlet-name>dispatcherServlet</servlet-name>
　　<url-pattern>*.service</url-pattern>
</servlet-mapping>  

客户端

配置Spring的HttpInvokerProxyFactoryBean

<bean id="httpInvokerUserService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
　　<property name="serviceUrl" value="http://localhost:8080/jws/httpInvokerUserService.service"/>
　　<property name="serviceInterface" value="com.gosun.jws.httpinvoker.UserService" />
</bean> 

测试代码

import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.gosun.jws.daomain.Users;  

public class ClientDemo {
    public static void main(String[] args) {
        ApplicationContext ac = new ClassPathXmlApplicationContext("client-application/applicationContext-httpInvoker.xml");
        UserService us = (UserService) ac.getBean("httpInvokerUserService");
        Users user = us.getUser("a001");
        System.out.println(user.toJson());
        System.out.println("----------------------------------------");
        List<Users> users = us.geAlltUsers();
        for (Users u : users) {
            System.out.println(u.toJson());
        }
        System.out.println("----------------------------------------");
        us.save(user);
        System.out.println("----------------------------------------");
        us.saves(users);
    }