RPC Server and Client-优快云博客

本文介绍了一个基于Hadoop的RPC实现案例，包括服务端和客户端的具体代码。该示例展示了如何创建一个简单的UserServiceProtocol接口及其实现类UserServiceImpl，并通过RPC启动服务及调用exists方法。

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package com.liang;

import java.io.IOException;

import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.RPC.Server;

public class RPCRunner {

	public static void main(String[] args) throws HadoopIllegalArgumentException, IOException {
		RPC.Builder builder = new RPC.Builder(new Configuration());
		builder.setBindAddress("localhost")//
				.setPort(1234)//
				.setInstance(new UserServiceImpl())//
				.setProtocol(UserServiceProtocol.class);
		Server server = builder.build();
		server.start();
	}

}


package com.liang;

public class UserServiceImpl implements UserServiceProtocol {

	@Override
	public boolean exists(String userName, String pwd) {
		System.out.println("some one invoked....");
		return false;
	}

}


package com.liang;

public interface UserServiceProtocol {

	public static final long versionID = 1l;

	boolean exists(String userName, String pwd);

}

以上为server端，下面为client端

package com.liang;

public interface UserServiceProtocol {

	public static final long versionID = 1l;

	boolean exists(String userName, String pwd);

}

package com.liang;

import java.net.InetSocketAddress;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.RPC;

public class RPCClient {

	public static void main(String[] args) throws Exception {
		UserServiceProtocol proxy = RPC.getProxy(UserServiceProtocol.class, 1l, new InetSocketAddress("localhost", 1234), new Configuration());
		proxy.exists("123", "455");
	}

}

转载于:https://my.oschina.net/corleone/blog/830660