Added a logout hook to IUserService

src/com/gitblit/ConfigUserService.java

@@ -199,6 +199,15 @@ public class ConfigUserService implements IUserService {
 		return returnedUser;
 	}
 
+	/**
+	 * Logout a user.
+	 * 
+	 * @param user
+	 */
+	@Override
+	public void logout(UserModel user) {	
+	}
+	
 	/**
 	 * Retrieve the user object for the specified username.
 	 * 

src/com/gitblit/FileUserService.java

@@ -177,6 +177,15 @@ public class FileUserService extends FileSettings implements IUserService {
 		return returnedUser;
 	}
 
+	/**
+	 * Logout a user.
+	 * 
+	 * @param user
+	 */
+	@Override
+	public void logout(UserModel user) {	
+	}
+
 	/**
 	 * Retrieve the user object for the specified username.
 	 * 

src/com/gitblit/GitBlit.java

@@ -481,6 +481,18 @@ public class GitBlit implements ServletContextListener {
 			response.addCookie(userCookie);
 		}
 	}
+	
+	/**
+	 * Logout a user.
+	 * 
+	 * @param user
+	 */
+	public void logout(UserModel user) {
+		if (userService == null) {
+			return;
+		}
+		userService.logout(user);
+	}
 
 	/**
 	 * Returns the list of all users available to the login service.

src/com/gitblit/GitblitUserService.java

@@ -141,6 +141,11 @@ public class GitblitUserService implements IUserService {
 	public UserModel authenticate(String username, char[] password) {
 		return serviceImpl.authenticate(username, password);
 	}
+	
+	@Override
+	public void logout(UserModel user) {
+		serviceImpl.logout(user);
+	}
 
 	@Override
 	public UserModel getUserModel(String username) {

src/com/gitblit/IUserService.java

@@ -87,6 +87,13 @@ public interface IUserService {
 	 */
 	UserModel authenticate(String username, char[] password);
 
+	/**
+	 * Logout a user.
+	 * 
+	 * @param user
+	 */
+	void logout(UserModel user);
+	
 	/**
 	 * Retrieve the user object for the specified username.
 	 * 

src/com/gitblit/wicket/pages/LogoutPage.java

@@ -19,13 +19,17 @@ import org.apache.wicket.markup.html.WebPage;
 import org.apache.wicket.protocol.http.WebResponse;
 
 import com.gitblit.GitBlit;
+import com.gitblit.models.UserModel;
 import com.gitblit.wicket.GitBlitWebSession;
 
 public class LogoutPage extends WebPage {
 
 	public LogoutPage() {
-		GitBlitWebSession.get().invalidate();
+		GitBlitWebSession session = GitBlitWebSession.get();
+		UserModel user = session.getUser();
 		GitBlit.self().setCookie((WebResponse) getResponse(), null);
+		GitBlit.self().logout(user);
+		session.invalidate();		
 		setRedirect(true);
 		setResponsePage(getApplication().getHomePage());
 	}