001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    package org.tynamo.security.components;
020    
021    import org.apache.tapestry5.annotations.Property;
022    import org.apache.tapestry5.ioc.annotations.Inject;
023    import org.apache.shiro.subject.Subject;
024    import org.apache.shiro.web.util.WebUtils;
025    
026    import org.tynamo.security.services.PageService;
027    import org.tynamo.security.services.SecurityService;
028    
029    /**
030     * If subject is not authenticated rendered link to login page,
031     * else link to logout.
032     *
033     */
034    public class LoginLink
035    {
036    
037            @Inject
038            @Property
039            private SecurityService securityService;
040    
041            @Inject
042            private PageService pageService;
043    
044            public String onActionFromTynamoLoginLink()
045            {
046                    removeSavedRequest();
047                    return pageService.getLoginPage();
048            }
049    
050            public void onActionFromTynamoLogoutLink()
051            {
052                    securityService.getSubject().logout();
053            }
054    
055            private void removeSavedRequest()
056            {
057                    Subject subject = securityService.getSubject();
058                    if (subject != null)
059                    {
060                            subject.getSession().removeAttribute(WebUtils.SAVED_REQUEST_KEY);
061                    }
062            }
063    
064    
065    }