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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.ConcurrentMap;
    19
    20  import org.jboss.netty.channel.Channel;
    21  import org.jboss.netty.util.internal.ConcurrentHashMap;
    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  }