I use Twitter4J and have yet to have a problem with it. I actually like it a lot.
The OAuth example they give on their website is the biggest nuisance -- it's not helpful. Here's my OAuthServlet code if you're interested (or anyone else). I know this question is rather old, so I'm putting it in here more for search results.
package com.example.oauth;
import java.io.PrintWriter;
import java.io.IOException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import twitter4j.*;
import twitter4j.http.*;
@SuppressWarnings("serial")
public class OAuthServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
HttpSession sess = req.getSession(true);
RequestToken requestToken = (RequestToken) sess.getAttribute("requestToken");
if (sess.getAttribute("twitter_user_id") != null) {
resp.setContentType("text/plain");
PrintWriter out = resp.getWriter();
if (req.getRequestURI().indexOf("logout") > 3) {
sess.removeAttribute("twitter_user_id");
out.println("You're now logged out.");
} else {
out.println("You're already logged in!");
}
} else if (req.getRequestURI().indexOf("callback") > 3 && req.getParameter("oauth_token").length() > 0 && requestToken != null) {
handleCallback(req, resp, sess);
if (sess.getAttribute("oauth_previous") != null) {
resp.sendRedirect((String) sess.getAttribute("oauth_previous"));
sess.removeAttribute("oauth_previous");
}
} else {
sendToTwitter(resp, sess);
sess.setAttribute("oauth_previous", req.getHeader("Referer"));
}
}
private void sendToTwitter(HttpServletResponse resp, HttpSession sess) throws IOException {
RequestToken requestToken = (RequestToken) sess.getAttribute("requestToken");
try {
Twitter twitter = new TwitterCnx().registerOAuth().get();
requestToken = twitter.getOAuthRequestToken();
sess.setAttribute("requestToken", requestToken);
resp.sendRedirect(requestToken.getAuthorizationURL());
} catch (TwitterException e) {
PrintWriter out = resp.getWriter();
out.println(e.getStackTrace());
}
}
private void handleCallback(HttpServletRequest req, HttpServletResponse resp, HttpSession sess) throws IOException {
RequestToken requestToken = (RequestToken) sess.getAttribute("requestToken");
sess.removeAttribute("requestToken");
String secret = req.getParameter("oauth_token");
resp.setContentType("text/plain");
PrintWriter out = resp.getWriter();
try {
Twitter t = new TwitterCnx().registerOAuth().get();
AccessToken accessToken = t.getOAuthAccessToken(requestToken.getToken(), secret);
long id = (long) t.verifyCredentials().getId();
storeAccessToken(id, accessToken,sess);
sess.setAttribute("twitter_user_id", id);
out.println("You're now logged in!");
} catch (TwitterException e) {
out.println("Something went wrong. Sorry about that. Please try again.");
}
}
private void storeAccessToken(Long id, AccessToken at, HttpSession sess) {
//you probably want to persist this somewhere other than in sessions.
sess.setAttribute("secret", at.getTokenSecret() );
sess.setAttribute("token", at.getToken());
//also, don't forget to persist the user id alongside the token.
}
}
I use the class TwitterCnx as a wrapper for twitter4j.Twitter. TwitterCnx defines my OAuth consumer stuff and returns a Twitter object. It's a final class with static methods so I don't produce more than one Twitter object per app instance.
