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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the 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.ConcurrentHashMap;
19  import java.util.concurrent.ConcurrentMap;
20  
21  import org.jboss.netty.channel.Channel;
22  
23  /**
24   */
25  final class LocalChannelRegistry {
26  
27      private static final ConcurrentMap<LocalAddress, Channel> map =
28          new ConcurrentHashMap<LocalAddress, Channel>();
29  
30      static boolean isRegistered(LocalAddress address) {
31          return map.containsKey(address);
32      }
33  
34      static Channel getChannel(LocalAddress address) {
35          return map.get(address);
36      }
37  
38      static boolean register(LocalAddress address, Channel channel) {
39          return map.putIfAbsent(address, channel) == null;
40      }
41  
42      static boolean unregister(LocalAddress address) {
43          return map.remove(address) != null;
44      }
45  
46      private LocalChannelRegistry() {
47          // Unused
48      }
49  }