Github OAuth ServiceConfig and ServiceProvider Bean

<bean id="githubServiceConfig" class="com.example.oauth.OAuthServiceConfig">
		<constructor-arg value="xxx" />
		<constructor-arg value="xxx"/>
		<constructor-arg value="https://www.example.com/oauth/github"/>
		<!--  <constructor-arg value="user,public_repo"/>-->
		<constructor-arg value="com.example.oauth.GithubOauthApi"/>
	</bean>
	<bean id="githubServiceProvider" class="com.example.oauth.OAuthServiceProvider">
		<constructor-arg name="config" ref="githubServiceConfig" />
	</bean>

Github OAuth Spring MVC Controller

package com.example.oauth.controller;

import static org.springframework.web.context.request.RequestAttributes.SCOPE_SESSION;

import java.util.Map;

import javax.servlet.http.HttpSession;

import org.scribe.model.Token;
import org.scribe.model.Verifier;
import org.scribe.oauth.OAuthService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.ModelAndView;

import com.example.oauth.OAuthServiceProvider;

@Controller
@RequestMapping("/oauth/github")
public class GitHubController {
	
	@Autowired
	@Qualifier("githubServiceProvider")
	private OAuthServiceProvider githubServiceProvider;
	
	private static final Token EMPTY_TOKEN = null;
	
	@RequestMapping(value = "/login-github", method = RequestMethod.GET)
	public String loginToGithub(Map<String, Object> map, WebRequest request) {
		OAuthService service = githubServiceProvider.getService();
		String auth = service.getAuthorizationUrl(EMPTY_TOKEN);
		System.out.println("RequestToken: " + auth);
		return "redirect:" + auth;
	}

	@RequestMapping(value = { "" }, method = RequestMethod.GET)
	public String callback(
			@RequestParam(value = "oauth_token", required = false) String oauthToken,
			@RequestParam(value = "code", required = false) String oauthVerifier,
			WebRequest request, Map<String, Object> map) {

		// getting request token
		OAuthService service = githubServiceProvider.getService();
		Token requestToken = (Token) request.getAttribute("oauthRequestToken",
				SCOPE_SESSION);

		// getting access token
		Verifier verifier = new Verifier(oauthVerifier);
		Token accessToken = service.getAccessToken(requestToken, verifier);

		// store access token as a session attribute
		request.setAttribute("oauthAccessToken", accessToken, SCOPE_SESSION);

		ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder
				.currentRequestAttributes();
		HttpSession session = attr.getRequest().getSession(false); // create a
																	
		session.setAttribute("accessToken", accessToken);

		return "settings";
	}
}

GithubOauthApi extends DefaultApi20

package com.example.oauth;

import org.scribe.builder.api.DefaultApi20;
import org.scribe.model.OAuthConfig;

public class GithubOauthApi extends DefaultApi20{

	private static final String ACCESSTOKEN="https://github.com/login/oauth/access_token";
	
	@Override
	public String getAccessTokenEndpoint() {
		// TODO Auto-generated method stub
		return ACCESSTOKEN;
	}

	@Override
	public String getAuthorizationUrl(OAuthConfig config) {
		// TODO Auto-generated method stub
		return String.format("https://github.com/login/oauth/authorize?client_id=%s&scope=%s&redirect_uri=%s", config.getApiKey(), config.getScope(), config.getCallback());
	}
}