Java RMI distributed program development example

Java RMI distributed program development example

 

Author: javaboy2012
Email: yanek@163.com
QQ: 1046011462

 

I. Server Side

Interface Definition: note that the remote interface must be inherited.

Package com. Yanek. RMI. server;

Import java. RMI. Remote;
Import java. RMI. RemoteException;
Import java. util. List;

Public interface channelmanager extends remote {
 
Public list <channel> getchannels () throws RemoteException;

}

Objects transmitted by the interface: note that the serializable interface must be implemented.

Package com. Yanek. RMI. server;

Import java. Io. serializable;

Public class channel implements serializable {
 
 
Private int ID;
Private string name;
Public int getId (){
Return id;
}
Public void setId (int id ){
This. id = id;
}
Public String getName (){
Return name;
}
Public void setName (String name ){
This. name = name;
}
Public Channel (int id, String name ){
Super ();
This. id = id;
This. name = name;
}
 

}

 

Interface implementation: Pay attention to inherit the UnicastRemoteObject class

Package com. yanek. rmi. server;

Import java. rmi. RemoteException;
Import java. rmi. server. UnicastRemoteObject;
Import java. util. arraylist;
Import java. util. date;
Import java. util. List;

Public class channelmanagerimpl extends unicastremoteobject implements channelmanager {

/**
*
*/
Private Static final long serialversionuid = 1l;

/**
* @ Param ARGs
*/
Public static void main (string [] ARGs ){



Try {
Channelmanager CM = channelmanagerimpl. getinstance ();

Channelmanager cm1 = channelmanagerimpl. getinstance ();
Channelmanager cm2 = channelmanagerimpl. getinstance ();
System. Out. println (cm1 );
System. Out. println (cm2 );
System. Out. println (CM );

List <channel> channels = cm. getchannels ();

For (INT I = 0; I <channels. Size (); I ++)
{
Channel c = channels. Get (I );

System. Out. println (C. GETID () + "-" + C. getname ());
}

} Catch (RemoteException e ){
E. printstacktrace ();
}

}
 
Private Static final object lock = new object ();
Private Static channelmanager instance;
 
Public static channelmanager getinstance () throws RemoteException {
If (instance = NULL ){
Synchronized (LOCK ){
If (instance = NULL)
Instance = new channelmanagerimpl ();
}
}
Return instance;
}
 
Private channelmanagerimpl () throws RemoteException {
}

@ Override
Public list <channel> getchannels () throws RemoteException {
List <channel> channels = new arraylist <channel> ();
Channels. Add (new channel (1, "Java "));
Channels. add (new Channel (2, "php "));
Channels. add (new Channel (3, "C "));
Channels. add (new Channel (4, "ASP "));
System. out. println (new Date () + "getChannels method called! ");
Return channels;
}

}

Service Startup class:

Package com. yanek. rmi. server;

Import java.net. MalformedURLException;
Import java. rmi. Naming;
Import java. rmi. RMISecurityManager;
Import java. rmi. RemoteException;
Import java. rmi. registry. LocateRegistry;

Public class RMIServer {

/**
* @ Param args
*/
Public static void main (String [] args ){

System. Out. println ("RMI server starting ...");


If (system. getsecuritymanager () = NULL ){
// System. setsecuritymanager (New rmisecuritymanager ());
}


Try {
Locateregistry. createregistry (1099 );
Try {
Naming. rebind ("channelmanager", channelmanagerimpl. getinstance ());
} Catch (malformedurlexception e ){
E. printstacktrace ();
}
} Catch (RemoteException e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
}

System. out. println ("RMI Server ready ...");

}

}

Pack the above four classes as server. jar

Package the ChannelManager and Channel classes as server_4client.jar.

Ii. Client

Package com. yanek. rmi. client;

Import java. rmi. Naming;
Import java. rmi. RMISecurityManager;
Import java. rmi. Remote;
Import java. rmi. RemoteException;
Import java. util. List;

Import com. yanek. rmi. server. Channel;
Import com. yanek. rmi. server. ChannelManager;

Public class ClientUtil {

/**
* @ Param args
*/
Public static void main (String [] args ){

ChannelManager cm = (ChannelManager) ClientUtil. renewRMI ("ChannelManager ");

List <channel> channels;
Try {
Channels = cm. getchannels ();

For (INT I = 0; I <channels. Size (); I ++ ){
Channel c = channels. Get (I );

System. Out. println (C. GETID () + "-" + C. getname ());
}

} Catch (RemoteException e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
}

 

}

Public static remote renewrmi (string name ){
Try {

If (system. getsecuritymanager () = NULL ){
// System. setsecuritymanager (New rmisecuritymanager ());
}
Return naming. Lookup ("RMI: // 192.168.136.1: 1099/" + name );
} Catch (exception re ){
Throw new illegalstateexception ("bind" + name + "failure .");
}

}

}

 

Package com. Yanek. RMI. client;

Import java. RMI. RemoteException;
Import java. util. arraylist;
Import java. util. List;

Import com. Yanek. RMI. server. channel;
Import com. Yanek. RMI. server. channelmanager;

Public class clienttest {

/**
* @ Param ARGs
*/
Public static void main (string [] ARGs ){

ChannelManager cm = (ChannelManager) ClientUtil. renewRMI ("ChannelManager ");

List <Channel> channels = new ArrayList <Channel> ();
Try {
Channels = cm. getChannels ();

For (int I = 0; I <channels. size (); I ++ ){
Channel c = channels. get (I );

System. out. println (c. getId () + "-" + c. getName ());
}

} Catch (RemoteException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}

}

}

Package the above two classes as client. jar

Iii. Release and deployment

Server Release: reference the server. jar package and execute the main method of the rmiserver class.

Client call: Reference server_4client.jar and client. Jar

 

The following code calls the batch processing script in bat mode in Windows:

Client. bat

@ Echo off

Set CP = config

For % I in (Lib \ *. Jar) Do call A. Bat % I

Set CP = % CP %;

Echo % CP %;

Java-CP % com. Yanek. RMI. Client. clienttest

Pause

Server. bat

@ Echo off

Set CP = config

For % I in (Lib \ *. Jar) Do call A. Bat % I

Set CP = % CP %;

Echo % CP %;

Java-CP % com. Yanek. RMI. server. rmiserver

Pause

 

Auxiliary File A. bat

Set CP = % CP %; % 1

Server startup

 

 

Client call:

 

 

 

 

Code and deployment file: http://download.csdn.net/detail/5iasp/5093357 (points are not required)