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1   /*
2    * Copyright 2009 Red Hat, Inc.
3    *
4    * Red Hat licenses this file to you under the Apache License, version 2.0
5    * (the "License"); you may not use this file except in compliance with the
6    * License.  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, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package org.jboss.netty.channel.local;
17  
18  import java.util.concurrent.ConcurrentMap;
19  
20  import org.jboss.netty.channel.Channel;
21  import org.jboss.netty.util.internal.ConcurrentHashMap;
22  
23  /**
24   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
25   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
26   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
27   */
28  final class LocalChannelRegistry {
29  
30      private static final ConcurrentMap<LocalAddress, Channel> map =
31          new ConcurrentHashMap<LocalAddress, Channel>();
32  
33      static boolean isRegistered(LocalAddress address) {
34          return map.containsKey(address);
35      }
36  
37      static Channel getChannel(LocalAddress address) {
38          return map.get(address);
39      }
40  
41      static boolean register(LocalAddress address, Channel channel) {
42          return map.putIfAbsent(address, channel) == null;
43      }
44  
45      static boolean unregister(LocalAddress address) {
46          return map.remove(address) != null;
47      }
48  
49      private LocalChannelRegistry() {
50          // Unused
51      }
52  }