七、axis调用RMI模式WebService

和先前写的web service几乎一样，不同的是这里写的WebService要实现接口，而我们实现的接口要继承rmi的Remote接口才行。

1、RMI接口，很简单的2个方法，继承Remote接口

package com.hoo.rmi;

import java.rmi.Remote;
/**
 * <b>function:</b>用axis实现RMI调用
 * @author hoojo
 * @createDate Dec 16, 2010 16:22:25 PM
 * @file HelloRMI.java
 * @package com.hoo.rmi
 * @project AxisWebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public interface HelloRMI extends Remote {
    public String sayHello(String name);
    
    public int getAge(int age);
}

2、实现上面的接口

package com.hoo.rmi.impl;

import com.hoo.rmi.HelloRMI;

/**
 * <b>function:</b>实现RMI服务器接口
 * @author hoojo
 * @createDate Dec 16, 2010 16:23:15 PM
 * @file HelloRMIImpl.java
 * @package com.hoo.rmi.impl
 * @project AxisWebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public class HelloRMIImpl implements HelloRMI {

    public int getAge(int age) {
        return age + 10;
    }

    public String sayHello(String name) {
        return name + " say: hello rmi WebService !";
    }
}

3、定制wsdd发布服务

<?xml version="1.0" encoding="UTF-8"?>
<deployment xmlns="http://xml.apache.org/axis/wsdd/"
    xmlns:java="http://xml.apache.org/axis/wsdd/providers/java">
    <service name="HelloRMI" provider="java:RPC">
        <parameter name="className" value="com.hoo.rmi.impl.HelloRMIImpl" />
        <parameter name="allowedMethods" value="getAge,sayHello" />
        <parameter name="scope" value="request" />
    </service>
</deployment>

4、命令行发布服务

java -Djava.ext.dirs=lib org.apache.axis.client.AdminClient -lhttp://localhost:8080/AxisWebService/services/AdminService deployRMI.wsdd

在浏览器中输入：

http://localhost:8080/AxisWebService/servlet/AxisServlet

即可查看到刚才发布的服务

5、编写客户端调用代码

package com.hoo.client;

import java.rmi.RemoteException;

import javax.xml.namespace.QName;
import javax.xml.rpc.ServiceException;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import com.hoo.rmi.HelloRMI;
/**
 * <b>function:</b>axis WebService的RMI调用模式
 * @author hoojo
 * @createDate Dec 16, 2010 16:28:09 PM
 * @file HelloRMIClient.java
 * @package com.hoo.client
 * @project AxisWebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public class HelloRMIClient {

    public static void main(String[] args) throws ServiceException, RemoteException {
        String url = "http://localhost:8080/AxisWebService/services/HelloRMI";
        //axis call调用
        Service service = new Service();
        Call call = (Call) service.createCall();
        call.setTargetEndpointAddress(url);
        call.setOperationName(new QName(url, "sayHello"));
        String result = (String) call.invoke(new Object[] { "jack" });
        System.out.println(result);
        
        //远程接口模式，只管接口不管实现，这就是面向接口的好处
        HelloRMI rmi = (HelloRMI) service.getPort(url, HelloRMI.class);
        System.out.println(rmi.getAge(22));
    }
}

HelloRMI rmi = (HelloRMI) service.getPort(url, HelloRMI.class);

用rmi接口调用的还是比较简单明了，接口中的方法都一目了然。我们也不用操心接口里面的方法是怎么样实现的，更具有面向接口编程、更加透明化。