001/*
002 * (C) Copyright 2006-2007 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 *
017 * $Id: JOOoConvertPluginImpl.java 18651 2007-05-13 20:28:53Z sfermigier $
018 */
019
020package org.nuxeo.ecm.webapp.helpers;
021
022import static org.jboss.seam.ScopeType.SESSION;
023
024import java.io.Serializable;
025import java.util.Map;
026
027import javax.faces.context.FacesContext;
028
029import org.jboss.seam.annotations.In;
030import org.jboss.seam.annotations.Name;
031import org.jboss.seam.annotations.Scope;
032import org.jboss.seam.annotations.Startup;
033import org.jboss.seam.core.Manager;
034
035@Startup
036@Name("conversationIdGenerator")
037@Scope(SESSION)
038public class ConversationIdGenerator implements Serializable {
039
040    private static final long serialVersionUID = 15643987456876L;
041
042    private static final String MAIN_CONVERSATION_PREFIX = "0NXMAIN";
043
044    private static final String CREATE_CONVERSATION_PREFIX = "0NXCREATE";
045
046    private int mainConversationCounter = 0;
047
048    private int createConversationCounter = 0;
049
050    @In(value = "org.jboss.seam.core.manager")
051    public transient Manager conversationManager;
052
053    public String getNextMainConversationId() {
054        String newMainConversationId;
055        if (mainConversationCounter == 0) {
056            newMainConversationId = MAIN_CONVERSATION_PREFIX;
057        } else {
058            newMainConversationId = MAIN_CONVERSATION_PREFIX + mainConversationCounter;
059        }
060        mainConversationCounter += 1;
061        return newMainConversationId;
062    }
063
064    public String getNextCreateConversationId() {
065        String newCreateConversationId;
066        if (createConversationCounter == 0) {
067            newCreateConversationId = CREATE_CONVERSATION_PREFIX;
068        } else {
069            newCreateConversationId = CREATE_CONVERSATION_PREFIX + createConversationCounter;
070        }
071        createConversationCounter += 1;
072        return newCreateConversationId;
073    }
074
075    public String getCurrentOrNewMainConversationId() {
076
077        // this case can happend if user logged in from a bookmarked URL that
078        // contains conversation ID
079        String existingConversationId = getConversationIdInURL();
080        if (existingConversationId != null && existingConversationId.startsWith(MAIN_CONVERSATION_PREFIX)) {
081            return existingConversationId;
082        }
083
084        if (conversationManager.isReallyLongRunningConversation()) {
085            existingConversationId = conversationManager.getCurrentConversationId();
086            if (existingConversationId.startsWith(MAIN_CONVERSATION_PREFIX)) {
087                return existingConversationId;
088            } else {
089                return getNextMainConversationId();
090            }
091        } else {
092            return getNextMainConversationId();
093        }
094    }
095
096    protected String getConversationIdInURL() {
097        final FacesContext facesContext = FacesContext.getCurrentInstance();
098        if (facesContext == null) {
099            return null;
100        }
101        Map<String, Object> rMap = facesContext.getExternalContext().getRequestMap();
102        String conversationIdInUrl;
103        if (rMap.containsKey(conversationManager.getConversationIdParameter())) {
104            conversationIdInUrl = (String) rMap.get(conversationManager.getConversationIdParameter());
105        } else {
106            Map<String, String> pMap = facesContext.getExternalContext().getRequestParameterMap();
107            if (pMap.containsKey(conversationManager.getConversationIdParameter())) {
108                conversationIdInUrl = pMap.get(conversationManager.getConversationIdParameter());
109            } else {
110                return null;
111            }
112        }
113        return conversationIdInUrl;
114    }
115
116}