samples/spring/src/main/java/org/apache/ki/samples/spring/web/LogoutController.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.ki.samples.spring.web;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import org.apache.ki.SecurityUtils;
import org.apache.ki.subject.Subject;

/**
 * Controller responsible for logging out the current user by invoking
 * {@link org.apache.ki.subject.Subject#logout()}
 *
 * @author Jeremy Haile
 * @since 0.1
 */
public class LogoutController extends AbstractController {

    protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Subject subject = SecurityUtils.getSubject();
        if (subject != null) {
            subject.logout();
        }

        HttpSession session = request.getSession(false);
        if( session != null ) {
            session.invalidate();
        }        

        return new ModelAndView("redirect:login");
    }
}