src/main/java/eu/etaxonomy/cdm/vaadin/util/CdmVaadinSessionUtilities.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2015 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.cdm.vaadin.util;
  11
  12 import java.util.concurrent.locks.Lock;
  13
  14 import org.apache.log4j.Logger;
  15
  16 import com.vaadin.server.VaadinSession;
  17
  18 import eu.etaxonomy.cdm.vaadin.session.BasicEventService;
  19 import eu.etaxonomy.cdm.vaadin.session.CdmDataChangeService;
  20 import eu.etaxonomy.cdm.vaadin.session.SelectionService;
  21
  22 /**
  23  * @author cmathew
  24  * @date 7 Apr 2015
  25  *
  26  */
  27 public class CdmVaadinSessionUtilities {
  28
  29     private static final Logger logger = Logger.getLogger(CdmVaadinSessionUtilities.class);
  30
  31     public static void setCurrentAttribute(String name, Object value) {
  32         Lock sessionLock = VaadinSession.getCurrent().getLockInstance();
  33         try {
  34             if(sessionLock != null) {
  35                 sessionLock.lock();
  36             }
  37             VaadinSession.getCurrent().setAttribute(name, value);
  38         } finally {
  39             if(sessionLock != null) {
  40                 sessionLock.unlock();
  41             }
  42         }
  43     }
  44
  45     public static void initCdmDataChangeService() {
  46         if(getCurrentCdmDataChangeService() != null) {
  47            logger.info("replacing data change service with new one");
  48         }
  49         setCurrentAttribute(CdmDataChangeService.KEY, new CdmDataChangeService());
  50     }
  51
  52     public static CdmDataChangeService getCurrentCdmDataChangeService() {
  53         return (CdmDataChangeService) VaadinSession.getCurrent().getAttribute(CdmDataChangeService.KEY);
  54     }
  55
  56     public static void initSelectionService() {
  57         if(getCurrentSelectionService() != null) {
  58             logger.info("replacing selection service with new one");
  59         }
  60         setCurrentAttribute(SelectionService.KEY, new SelectionService());
  61     }
  62
  63     public static SelectionService getCurrentSelectionService() {
  64         return (SelectionService) VaadinSession.getCurrent().getAttribute(SelectionService.KEY);
  65     }
  66
  67     public static void initBasicEventService() {
  68         if(getCurrentBasicEventService() != null) {
  69             logger.info("replacing basic event service with new one");
  70         }
  71         setCurrentAttribute(BasicEventService.KEY, new BasicEventService());
  72     }
  73
  74     public static BasicEventService getCurrentBasicEventService() {
  75         return (BasicEventService) VaadinSession.getCurrent().getAttribute(BasicEventService.KEY);
  76     }
  77 }