eu.etaxonomy.taxeditor.cdmlib/src/main/java/eu/etaxonomy/taxeditor/session/CdmEntitySessionManager.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2014 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10 package eu.etaxonomy.taxeditor.session;
  11
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.HashMap;
  15 import java.util.List;
  16 import java.util.Map;
  17
  18 import org.apache.log4j.Logger;
  19 import org.springframework.stereotype.Component;
  20
  21 import eu.etaxonomy.cdm.model.common.CdmBase;
  22
  23 /**
  24  * @author cmathew
  25  * @date 16 Oct 2014
  26  *
  27  */
  28 @Component
  29 public class CdmEntitySessionManager implements ICdmEntitySessionManager {
  30         private static final Logger logger = Logger.getLogger(CdmEntitySessionManager.class);
  31
  32     private final Map<ICdmEntitySessionEnabled, ICdmEntitySession> ownerSessionMap =
  33                 new HashMap<ICdmEntitySessionEnabled, ICdmEntitySession>();
  34
  35     private final List<ICdmEntitySessionManagerObserver> sessionObservers = new ArrayList<ICdmEntitySessionManagerObserver>();
  36
  37     private ICdmEntitySession activeSession;
  38
  39     @Override
  40         public ICdmEntitySession newSession(ICdmEntitySessionEnabled sessionOwner, boolean setAsActive) {
  41                 ICdmEntitySession session = ownerSessionMap.get(sessionOwner);
  42                 if(session == null) {
  43                         session = new CdmEntitySession(sessionOwner, this);
  44                         addToOwnerSessionMap(sessionOwner, session);
  45
  46                 }
  47
  48                 if(setAsActive) {
  49                         activeSession = session;
  50
  51                 }
  52
  53                 return session;
  54         }
  55
  56     @Override
  57     public ICdmEntitySession getActiveSession() {
  58         return activeSession;
  59     }
  60
  61
  62     /* (non-Javadoc)
  63      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#getSessions()
  64      */
  65     @Override
  66     public Collection<ICdmEntitySession> getSessions() {
  67         return ownerSessionMap.values();
  68     }
  69
  70
  71         /* (non-Javadoc)
  72          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#bind(eu.etaxonomy.taxeditor.session.ISessionEventListener)
  73          */
  74         @Override
  75         public void bind(ICdmEntitySessionEnabled sessionOwner) {
  76                 if(sessionOwner == null) {
  77                         activeSession = null;
  78                         return;
  79                 }
  80                 ICdmEntitySession session  = ownerSessionMap.get(sessionOwner);
  81                 if(session == null) {
  82                         session = newSession(sessionOwner,true);
  83                 }
  84
  85                 activeSession = session;
  86
  87         }
  88
  89
  90         /* (non-Javadoc)
  91          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(T)
  92          */
  93         @Override
  94         public <T extends Object> T load(T obj, boolean update) {
  95                 if(activeSession == null) {
  96                         return obj;
  97                 } else {
  98                         return activeSession.load(obj, update);
  99                 }
 100         }
 101
 102
 103         /* (non-Javadoc)
 104          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(T)
 105          */
 106         @Override
 107         public <T extends CdmBase> T load(T cdmBase, boolean update) {
 108                 if(activeSession == null) {
 109                         return cdmBase;
 110                 }
 111                 return activeSession.load(cdmBase, update);
 112         }
 113
 114
 115
 116         /* (non-Javadoc)
 117          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(java.util.Collection)
 118          */
 119         @Override
 120         public <T extends CdmBase> Collection<T> load(Collection<T> cdmBaseList, boolean update) {
 121                 if(activeSession == null) {
 122                         return cdmBaseList;
 123                 }
 124                 return activeSession.load(cdmBaseList, update);
 125         }
 126
 127
 128         /* (non-Javadoc)
 129          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#dispose(eu.etaxonomy.taxeditor.session.ISessionEventListener)
 130          */
 131         void dispose(ICdmEntitySessionEnabled owner) {
 132                 ICdmEntitySession session = ownerSessionMap.get(owner);
 133                 if(session == null) {
 134                         logger.info("No Session connected to owner, nothing to dispose");
 135                         return;
 136                 }
 137                 if(session == activeSession) {
 138                     activeSession = null;
 139                 }
 140                 ownerSessionMap.remove(owner);
 141                 notifyObservers();
 142         }
 143
 144          void addToOwnerSessionMap(ICdmEntitySessionEnabled owner, ICdmEntitySession session) {
 145                 ownerSessionMap.put(owner, session);
 146         }
 147
 148     /* (non-Javadoc)
 149      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#addSessionListener()
 150      */
 151     @Override
 152     public void addSessionObserver(ICdmEntitySessionManagerObserver sessionObserver) {
 153         sessionObservers.add(sessionObserver);
 154     }
 155
 156     public void notifyObservers() {
 157         for(ICdmEntitySessionManagerObserver sessionObserver : sessionObservers) {
 158             sessionObserver.changed();
 159         }
 160     }
 161
 162     /* (non-Javadoc)
 163      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#isRemoting()
 164      */
 165     @Override
 166     public boolean isRemoting() {
 167         // FIXME:Remoting stupid method to check whether we are in remoting
 168         return true;
 169     }
 170
 171
 172
 173
 174
 175
 176
 177 }