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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  }