The right way to use twitter4j in appengine

Question

I am creating a web application that is trying to read twitter's profile, display his friends and show his photo. Sample code on Twitter4j website:

public static void main(String args[]) thrwos Exception{
   Twitter twitter = new Twitter();
   twitter.setOAuthConsumer("[consumer key]", "[consumer secret]");
   RequestToken requestToken = twitter.getOAuthRequestToken();
   AccessToken accessToken = null;
   BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
   while (null == accessToken) {
        System.out.println("Open the following URL 
           and grant access to your account:");
        System.out.println(requestToken.getAuthorizationURL());
        System.out.print("Hit enter when it done.[Enter]:");
        br.readLine();
        try{
          accessToken = requestToken.getAccessToken();
        } catch (TwitterException te) {
        if(401 == te.getStatusCode()){
        System.out.println("Unable to get the access token.");
        }else{
         te.printStackTrace();
       }
  }
 }
}

What am I doing in the servlet, give it the name IndexServlet I have the following code:

   Twitter twitter = new Twitter();
   twitter.setOAuthConsumer("[consumer key]", "[consumer secret]");
   RequestToken requestToken = twitter.getOAuthRequestToken();
   String authUrl = requestToken.getAuthorizationURL()

and then I pass authUrl to jsp so the user can click on it. It works so far, but after that I was already stuck! :)

I'm not sure where to set the callback url. Should I install it on the same servlet? The problem is that I must have the same twitter and requestToken variables as the first code with the main method, so I can do this:

accessToken = requestToken.getAccessToken();
Status status = twitter.updateStatus(some argument here);

URL- IndexServlet , Twitter. , , ,

if (already setup) {
   accessToken = requestToken.getAccessToken();
   Status status = twitter.updateStatus(some argument here);
} 

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• twitter requestToken , , twitter URL- , , -, .

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Answer 1

, Twitter4j + Oauth Google. .

, , Twitter4j Oauth ( appengine, ). , , , ! , .

, , - , Twitters URL- . , . !

Answer 2

session. Google App Engine , .