Client/server, applet/server

Question

Hi
I have a question about server/client programming in java.
I have been programming a shortest path algorithm, but it takes to long time to rune this peace of code on the client. So I want to move it to the server.
The client is an applet but also a java program that runs on another computer.
How can I (the simples way) place the algorithm on the server and then call on it from the applet but also from the java program. I also want to send some data from the applet/client to the server, and then the server returns the processed information.
This don�t have to be 100% secure, easy and fast is better : )
(I only write it for my own learning)
I found something that use COBRA but is this necessary?
If you have I would like some sample code, but a url that handles the problem would be excellent.
Best regards,
Anders Sandholm

Answer 1

to applet client and server comunication you can use this:
from Applet To Server write this
private static String servletUri = new String("/myApp/Servlet");
private static String host = new String("localhost");
private static int port = 8080;      
//Sen data to server
URL dataURL = new URL("http",host, port, servletUri);
URLConnection con = dataURL.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);                    
//Send data
Serializable obj = "send this";
ObjectOutputStream out = new ObjectOutputStream(new GZIPOutputStream(con.getOutputStream()));
out.writeObject(obj);
out.flush();
out.close();                              
//get a Server aswer
ObjectInputStream din = new ObjectInputStream(new GZIPInputStream(con.getInputStream()));
String data;
data=(String)din.readObject();                    
din.close();     
===================================================================
from Servlet (on server) to applet
     ObjectInputStream din = new ObjectInputStream(new GZIPInputStream(req.getInputStream()));
     String data;
     data=(String) din.readObject();
     din.close();                              
//... do anything
//send client answer
Serializable obj = "result";
ObjectOutputStream out = new ObjectOutputStream(new GZIPOutputStream(res.getOutputStream()));
out.writeObject(obj);
     out.close();