NullPointer Exception when trying to implement a sample token server.

Hello,

I am new to jWebSocket and trying to use it now with my own applications.

I downloaded the server and client package, extracted it into a folder and set the JWEBSOCKET_HOME accordingly.
The server bat script works fine, I can use the demos provided in the client package.

No I am trying to implement my own server in netbeans.

I added the libraries jWebSocket-Common, ...-Server and -ServerAPI to my project and wrote the following:

public class WebSocketServer implements WebSocketServerTokenListener
{
    private TokenServer tokenserver;
    
    public void init()
    {
        try
        {
            //JWebSocketFactory.printCopyrightToConsole();
            JWebSocketFactory.start();
            
            tokenserver = JWebSocketFactory.getTokenServer();
            if(tokenserver!=null)
            {
                tokenserver.addListener(this);
                System.out.println("Setup complete");
            }
            else System.out.println("oops");
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
    }

@Override
    public void processToken(WebSocketServerTokenEvent wsste, Token token)
    {
        System.out.println("Token.");
    }

@Override
    public void processOpened(WebSocketServerEvent wsse)
    {
        System.out.println("Opened.");
    }

@Override
    public void processPacket(WebSocketServerEvent wsse, WebSocketPacket wsp)
    {
        System.out.println("Packet. " + wsp.getString());
    }

@Override
    public void processClosed(WebSocketServerEvent wsse)
    {
        System.out.println("Closed.");
    }
    
}

In a main class I instantiate a new class object and call init(), but the JWebSocketFactory.start() returns a nullPoint Exception

java.lang.NullPointerException
at org.jwebsocket.factory.JWebSocketFactory.start(JWebSocketFactory.java:119)
at org.jwebsocket.factory.JWebSocketFactory.start(JWebSocketFactory.java:83)
at webserver.WebSocketServer.init(WebSocketServer.java:2
at webserver.WebServer.main(WebServer.java:19)

What is wrong here?

Hi stephezapo,

these are the first two lines which are mandatory to start up the server:Please insert these lines and the server should start up, don't hesitate to contact us again in case of further questions.

Best Regards
Alex

That worked, thank you very much! initForConsoleApp() was missing in my code.

jwebsocket config.init for console(aArgs);
hello sir,
i am not able to understand, that what should i pass here in jwebsocket config.init for console(____what to pass______);

Error initializing engine based on given configuration
i m also facing above error

This message was edited 1 time. Last update was at 24/05/2012 15:29:45

Do i still need this in the newest Version?

i don't have this method in my org.jwebsocket.config.JWebSocketConfig Class??

initForConsoleApp(aArgs);

What exactly is it doing?

Btw it seems like in the newest version there is no standard Tokenserver starting automatically? When i use the getServers method at the WebSocketFactory i get null as answer. is that correct?

I just fixed this problem in my test and I had to do this:

public void contextInitialized(ServletContextEvent aSCE) {
// http://enapso.org/jwsForum219/posts/list/15619.page
// the following line must not be removed due to GNU LGPL 3.0 license!
JWebSocketFactory.printCopyrightToConsole();

// check if home, config or bootstrap path are passed by command line
JWebSocketConfig.initForWebApp(aSCE.getServletContext());

// start the jWebSocket server sub system
JWebSocketFactory.start();

Is that the correct approach?