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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.socket.oio;
    17
    18  import java.io.IOException;
    19  import java.net.InetSocketAddress;
    20  import java.net.SocketAddress;
    21
    22  import org.jboss.netty.channel.AbstractChannel;
    23  import org.jboss.netty.channel.Channel;
    24  import org.jboss.netty.channel.ChannelFactory;
    25  import org.jboss.netty.channel.ChannelFuture;
    26  import org.jboss.netty.channel.ChannelPipeline;
    27  import org.jboss.netty.channel.ChannelSink;
    28  import org.jboss.netty.channel.socket.Worker;
    29
    30  abstract class AbstractOioChannel extends AbstractChannel {
    31      private volatile InetSocketAddress localAddress;
    32      volatile InetSocketAddress remoteAddress;
    33      volatile Thread workerThread;
    34      volatile Worker worker;
    35
    36      final Object interestOpsLock = new Object();
    37
    38      AbstractOioChannel(
    39              Channel parent,
    40              ChannelFactory factory,
    41              ChannelPipeline pipeline,
    42              ChannelSink sink) {
    43          super(parent, factory, pipeline, sink);
    44      }
    45
    46      @Override
    47      protected boolean setClosed() {
    48          return super.setClosed();
    49      }
    50
    51      @Override
    52      protected void setInterestOpsNow(int interestOps) {
    53          super.setInterestOpsNow(interestOps);
    54      }
    55
    56      @Override
    57      public ChannelFuture write(Object message, SocketAddress remoteAddress) {
    58          if (remoteAddress == null || remoteAddress.equals(getRemoteAddress())) {
    59              return super.write(message, null);
    60          } else {
    61              return super.write(message, remoteAddress);
    62          }
    63      }
    64
    65
    66      public boolean isBound() {
    67          return isOpen() && isSocketBound();
    68      }
    69
    70
    71      public boolean isConnected() {
    72          return isOpen() && isSocketConnected();
    73      }
    74
    75
    76
    77      public InetSocketAddress getLocalAddress() {
    78          InetSocketAddress localAddress = this.localAddress;
    79          if (localAddress == null) {
    80              try {
    81                  this.localAddress = localAddress = getLocalSocketAddress();
    82              } catch (Throwable t) {
    83                  // Sometimes fails on a closed socket in Windows.
    84                  return null;
    85              }
    86          }
    87          return localAddress;
    88      }
    89
    90
    91      public InetSocketAddress getRemoteAddress() {
    92          InetSocketAddress remoteAddress = this.remoteAddress;
    93          if (remoteAddress == null) {
    94              try {
    95                  this.remoteAddress = remoteAddress =
    96                      getRemoteSocketAddress();
    97              } catch (Throwable t) {
    98                  // Sometimes fails on a closed socket in Windows.
    99                  return null;
    100             }
    101         }
    102         return remoteAddress;
    103     }
    104
    105     abstract boolean isSocketBound();
    106
    107     abstract boolean isSocketConnected();
    108
    109     abstract boolean isSocketClosed();
    110
    111     abstract InetSocketAddress getLocalSocketAddress() throws Exception;
    112
    113     abstract InetSocketAddress getRemoteSocketAddress() throws Exception;
    114
    115     abstract void closeSocket() throws IOException;
    116
    117 }