runtime/org.argeo.slc.server/src/main/java/org/argeo/slc/web/mvc/WebSlcEventListenerRegister.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.web.mvc;
  17
  18 import java.io.Serializable;
  19 import java.util.ArrayList;
  20 import java.util.List;
  21 import java.util.Vector;
  22
  23 import org.argeo.slc.msg.event.SlcEventListenerDescriptor;
  24 import org.argeo.slc.msg.event.SlcEventListenerRegister;
  25 import org.springframework.web.context.request.RequestContextHolder;
  26
  27 public class WebSlcEventListenerRegister implements SlcEventListenerRegister,
  28                 Serializable {
  29         public final static String ATTR_EVENT_LISTENER = "slcEventListener";
  30
  31         static final long serialVersionUID = 1l;
  32
  33         // private String clientId = UUID.randomUUID().toString();
  34
  35         /** Synchronized */
  36         private List<SlcEventListenerDescriptor> descriptors = new Vector<SlcEventListenerDescriptor>();
  37
  38         public synchronized void addEventListenerDescriptor(
  39                         SlcEventListenerDescriptor eventListenerDescriptor) {
  40                 if (descriptors.contains(eventListenerDescriptor))
  41                         descriptors.remove(eventListenerDescriptor);
  42                 descriptors.add(eventListenerDescriptor);
  43         }
  44
  45         public synchronized void removeEventListenerDescriptor(
  46                         SlcEventListenerDescriptor eventListenerDescriptor) {
  47                 descriptors.remove(eventListenerDescriptor);
  48         }
  49
  50         public synchronized List<SlcEventListenerDescriptor> getDescriptorsCopy() {
  51                 return new ArrayList<SlcEventListenerDescriptor>(descriptors);
  52         }
  53
  54         public String getId() {
  55                 return RequestContextHolder.currentRequestAttributes().getSessionId();
  56         }
  57
  58         // public SlcEvent listen(SlcEventListener eventListener, Long timeout) {
  59         // return eventListener.listen(clientId, getDescriptorsCopy(), timeout);
  60         // }
  61
  62         // public void init() {
  63         // clientId = getSessionId();
  64         // checkClientId();
  65         //
  66         // if (log.isDebugEnabled())
  67         // log.debug("Initialized web event listener " + clientId);
  68         // }
  69         //
  70         // public void close() {
  71         // checkClientId();
  72         // if (log.isDebugEnabled())
  73         // log.debug("Closed web event listener " + clientId);
  74         // }
  75
  76         // protected void checkClientId() {
  77         // String sessionId = getSessionId();
  78         // if (clientId == null || !clientId.equals(sessionId))
  79         // throw new SlcException("Client id " + clientId
  80         // + " not consistent with web session id " + sessionId);
  81         // }
  82         //
  83         // protected String getSessionId() {
  84         // return RequestContextHolder.currentRequestAttributes().getSessionId();
  85         // }
  86         //
  87 }