public RadiusLoginHandler(String name,
    String password,
    String clientIP,
    String callingStationID,
    String radiusHostname,
    String sharedSecret,
    int authPort,
    int acctPort,
    int retries,
    int timeout) 
{
        if (name == null || password == null || clientIP == null) {
            throw new IllegalArgumentException("Arguments cannont be null");
        }
        this.name = name;
        this.password = password;
        this.clientIP = clientIP;
		this.callingStationID = callingStationID;
		this.hostName = radiusHostname;
		this.sharedSecret = sharedSecret;
		this.authPort = authPort;
		this.acctPort = acctPort;
		this.numRetries = retries;
		this.timeout = timeout;
}

Constructor

Throws:

java.lang.IllegalArgumentException - if any param is null

 public  void handle(Callback[] callback) throws IOException, UnsupportedCallbackException 
{
        for(int i = 0; i <  callback.length; i++){
            handle(callback[i]);
        }
}

Callback Handler for the login service

 protected  void handle(Callback callback) throws UnsupportedCallbackException 
{
        if (callback instanceof NameCallback) {
            ((NameCallback)callback).setName(name);
        }else if (callback instanceof PasswordCallback) {
            ((PasswordCallback)callback).setPassword(password.toCharArray());
        }else if (callback instanceof TextInputCallback) {
            // this code assumes that there will only be one TextInputCallback and it is used for the client IP
            ((TextInputCallback)callback).setText(clientIP);
        }else if (callback instanceof RadiusCallback) {
			RadiusCallback radiusCallback = (RadiusCallback)callback;
			radiusCallback.setHostName(this.hostName);
			radiusCallback.setSharedSecret(this.sharedSecret);
			radiusCallback.setAuthPort(this.authPort);
			radiusCallback.setAcctPort(this.acctPort);
			radiusCallback.setCallingStationID(this.callingStationID);
			radiusCallback.setNumRetries(this.numRetries);
			radiusCallback.setTimeout(this.timeout);
		}else {
            throw new UnsupportedCallbackException(callback);
        }
}

 public  void login() throws LoginException 
{
        LoginContext loginContext = new LoginContext(JAAS_MODULE_KEY, this);
        loginContext.login();
}

If this method returns the login was successfull, but if it throws an exception it failed. There are subclasses of LoginException for the specific kinds of failures.