带回调的RMI实例

1 服务端远程接口

 

 public interface RMITest2I extends Remote {

 

public void registerClient(RMITest2ClientI client)throws RemoteException;

 

public void unregisterClient(RMITest2ClientI client)throws RemoteException;

}

 

2服务端实现

 public class RMITest2 extends UnicastRemoteObject implements RMITest2I,Runnable {

 

 

private HashSet client;

 

public RMITest2()throws RemoteException {

client=new HashSet();

}

 

 

public void registerClient(RMITest2ClientI client) throws RemoteException {

this.client.add(client);

 

}

 

 

public void unregisterClient(RMITest2ClientI client) throws RemoteException {

   this .client.remove(client);

}

 

 

 

public void run() {

for(;;){

 

Iterator iter=client.iterator();

while(iter.hasNext()){

 

RMITest2ClientI client=(RMITest2ClientI) iter.next();

try {

client.getPerfectTime();

} catch (Exception e) {

System.out.println("移出无效对象");

iter.remove();

}

try {

Thread.sleep(1000);

} catch (Exception e) {

   }

}

}

}

 

 

public static void main(String[] args) {

 

try {

if(System.getSecurityManager()==null){

System.setSecurityManager(new SecurityManager());

}

 

RMITest2 rt=new RMITest2();

Naming.bind("localhost/RMITest2", rt);

System.out.println("bind OK");

new Thread(rt).start();

 

} catch (Exception e) {

 

e.printStackTrace();

}

 

}

 

 

3 客户端接口

  public interface RMITest2ClientI extends Remote{

 

public void getPerfectTime()throws RemoteException;

}

 

 

4客户端实现

 

 public class RMITest2Client extends UnicastRemoteObject implements RMITest2ClientI{

 

protected RMITest2Client() throws RemoteException {

super();

 

}

 

 

public void getPerfectTime() throws RemoteException {

System.out.println("perfect time"+System.currentTimeMillis());

 

}

 

public static void main(String[] args) {

try {

if(System.getSecurityManager()==null){

System.setSecurityManager(new SecurityManager());

}

   RMITest2ClientI client=new RMITest2Client();

RMITest2I rt=(RMITest2I)Naming.lookup("localhost/RMITest2");

System.out.println("服务端回调");

rt.registerClient(client);

} catch (Exception e) {

e.printStackTrace();

}

 

}

}

 

 

编译所有文件

Start rmiregistry

运行服务端  bind OK

运行客户端

输出： 

服务端回调

perfect time1303724206971

perfect time1303724207974

perfect time1303724208977

perfect time1303724209980

perfect time1303724210984

perfect time1303724211987

perfect time1303724212990

perfect time1303724213995

perfect time1303724214998

perfect time1303724216001

perfect time1303724217004

perfect time1303724218007

perfect time1303724219010