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

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   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
  17 package org.argeo.slc.web.mvc;
  18
  19 import java.io.Serializable;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22 import java.util.Vector;
  23
  24 import org.argeo.slc.msg.event.SlcEventListenerDescriptor;
  25 import org.argeo.slc.msg.event.SlcEventListenerRegister;
  26 import org.springframework.web.context.request.RequestContextHolder;
  27
  28 public class WebSlcEventListenerRegister implements SlcEventListenerRegister,
  29                 Serializable {
  30         public final static String ATTR_EVENT_LISTENER = "slcEventListener";
  31
  32         static final long serialVersionUID = 1l;
  33
  34         // private String clientId = UUID.randomUUID().toString();
  35
  36         /** Synchronized */
  37         private List<SlcEventListenerDescriptor> descriptors = new Vector<SlcEventListenerDescriptor>();
  38
  39         public synchronized void addEventListenerDescriptor(
  40                         SlcEventListenerDescriptor eventListenerDescriptor) {
  41                 if (descriptors.contains(eventListenerDescriptor))
  42                         descriptors.remove(eventListenerDescriptor);
  43                 descriptors.add(eventListenerDescriptor);
  44         }
  45
  46         public synchronized void removeEventListenerDescriptor(
  47                         SlcEventListenerDescriptor eventListenerDescriptor) {
  48                 descriptors.remove(eventListenerDescriptor);
  49         }
  50
  51         public synchronized List<SlcEventListenerDescriptor> getDescriptorsCopy() {
  52                 return new ArrayList<SlcEventListenerDescriptor>(descriptors);
  53         }
  54
  55         public String getId() {
  56                 return RequestContextHolder.currentRequestAttributes().getSessionId();
  57         }
  58
  59         // public SlcEvent listen(SlcEventListener eventListener, Long timeout) {
  60         // return eventListener.listen(clientId, getDescriptorsCopy(), timeout);
  61         // }
  62
  63         // public void init() {
  64         // clientId = getSessionId();
  65         // checkClientId();
  66         //
  67         // if (log.isDebugEnabled())
  68         // log.debug("Initialized web event listener " + clientId);
  69         // }
  70         //
  71         // public void close() {
  72         // checkClientId();
  73         // if (log.isDebugEnabled())
  74         // log.debug("Closed web event listener " + clientId);
  75         // }
  76
  77         // protected void checkClientId() {
  78         // String sessionId = getSessionId();
  79         // if (clientId == null || !clientId.equals(sessionId))
  80         // throw new SlcException("Client id " + clientId
  81         // + " not consistent with web session id " + sessionId);
  82         // }
  83         //
  84         // protected String getSessionId() {
  85         // return RequestContextHolder.currentRequestAttributes().getSessionId();
  86         // }
  87         //
  88 }