001 /* 002 * Copyright 1999-2001,2004 The Apache Software Foundation. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017 package org.apache.commons.latka.jelly; 018 019 import java.util.Map; 020 021 import org.apache.commons.jelly.JellyTagException; 022 import org.apache.commons.jelly.TagSupport; 023 import org.apache.commons.jelly.XMLOutput; 024 025 import org.apache.commons.latka.http.Session; 026 import org.apache.commons.latka.http.SessionImpl; 027 028 /** 029 * 030 * @author Morgan Delagrange 031 */ 032 public class SessionTag extends TagSupport { 033 034 protected String _sessionId = null; 035 protected String _label = null; 036 protected Session _session = null; 037 038 /** 039 * 040 * 041 * @param xmlOutput a place to write output 042 * @throws JellyTagException if the tag body could not be invoked 043 */ 044 public void doTag(XMLOutput xmlOutput) throws JellyTagException { 045 _session = findSession(_sessionId); 046 invokeBody(xmlOutput); 047 } 048 049 public Session getSession() { 050 return _session; 051 } 052 053 protected Session findSession(String sessionId) { 054 if (sessionId == null) { 055 return new SessionImpl(); 056 } 057 058 SuiteTag tag = (SuiteTag) findAncestorWithClass(SuiteTag.class); 059 Map sessionCache = tag.getSessionCache(); 060 Session cachedSession = (Session) sessionCache.get(sessionId); 061 if (cachedSession == null) { 062 Session session = new SessionImpl(); 063 sessionCache.put(sessionId,session); 064 return session; 065 } else { 066 return cachedSession; 067 } 068 } 069 070 /** 071 * Optionally sets the session id. If a session id 072 * is specified, state information (cookies, etc.) 073 * will be shared by any session with the same id. 074 * 075 * @param sessionId arbitrary session id, specified by the user in 076 * the Latka script 077 */ 078 public void setSessionId(String sessionId) { 079 _sessionId = sessionId; 080 } 081 082 /** 083 * Set the label for this session 084 * 085 * @param label session label 086 */ 087 public void setLabel(String label) { 088 _label = label; 089 } 090 }