001/*
002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others.
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 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id: JOOoConvertPluginImpl.java 18651 2007-05-13 20:28:53Z sfermigier $
020 */
021
022package org.nuxeo.ecm.webapp.helpers;
023
024import static org.jboss.seam.ScopeType.SESSION;
025
026import java.io.Serializable;
027import java.util.Map;
028
029import javax.faces.context.FacesContext;
030
031import org.jboss.seam.annotations.In;
032import org.jboss.seam.annotations.Name;
033import org.jboss.seam.annotations.Scope;
034import org.jboss.seam.annotations.Startup;
035import org.jboss.seam.core.Manager;
036
037@Startup
038@Name("conversationIdGenerator")
039@Scope(SESSION)
040public class ConversationIdGenerator implements Serializable {
041
042    private static final long serialVersionUID = 15643987456876L;
043
044    private static final String MAIN_CONVERSATION_PREFIX = "0NXMAIN";
045
046    private static final String CREATE_CONVERSATION_PREFIX = "0NXCREATE";
047
048    private int mainConversationCounter = 0;
049
050    private int createConversationCounter = 0;
051
052    @In(value = "org.jboss.seam.core.manager")
053    public transient Manager conversationManager;
054
055    public String getNextMainConversationId() {
056        String newMainConversationId;
057        if (mainConversationCounter == 0) {
058            newMainConversationId = MAIN_CONVERSATION_PREFIX;
059        } else {
060            newMainConversationId = MAIN_CONVERSATION_PREFIX + mainConversationCounter;
061        }
062        mainConversationCounter += 1;
063        return newMainConversationId;
064    }
065
066    public String getNextCreateConversationId() {
067        String newCreateConversationId;
068        if (createConversationCounter == 0) {
069            newCreateConversationId = CREATE_CONVERSATION_PREFIX;
070        } else {
071            newCreateConversationId = CREATE_CONVERSATION_PREFIX + createConversationCounter;
072        }
073        createConversationCounter += 1;
074        return newCreateConversationId;
075    }
076
077    public String getCurrentOrNewMainConversationId() {
078
079        // this case can happend if user logged in from a bookmarked URL that
080        // contains conversation ID
081        String existingConversationId = getConversationIdInURL();
082        if (existingConversationId != null && existingConversationId.startsWith(MAIN_CONVERSATION_PREFIX)) {
083            return existingConversationId;
084        }
085
086        if (conversationManager.isReallyLongRunningConversation()) {
087            existingConversationId = conversationManager.getCurrentConversationId();
088            if (existingConversationId.startsWith(MAIN_CONVERSATION_PREFIX)) {
089                return existingConversationId;
090            } else {
091                return getNextMainConversationId();
092            }
093        } else {
094            return getNextMainConversationId();
095        }
096    }
097
098    protected String getConversationIdInURL() {
099        final FacesContext facesContext = FacesContext.getCurrentInstance();
100        if (facesContext == null) {
101            return null;
102        }
103        Map<String, Object> rMap = facesContext.getExternalContext().getRequestMap();
104        String conversationIdInUrl;
105        if (rMap.containsKey(conversationManager.getConversationIdParameter())) {
106            conversationIdInUrl = (String) rMap.get(conversationManager.getConversationIdParameter());
107        } else {
108            Map<String, String> pMap = facesContext.getExternalContext().getRequestParameterMap();
109            if (pMap.containsKey(conversationManager.getConversationIdParameter())) {
110                conversationIdInUrl = pMap.get(conversationManager.getConversationIdParameter());
111            } else {
112                return null;
113            }
114        }
115        return conversationIdInUrl;
116    }
117
118}