查看本类的 API文档回源码主页

   /*
    * Copyright 2017 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   https://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package io.netty.bootstrap;
  
  import io.netty.channel.AbstractChannel;
  import io.netty.channel.ChannelConfig;
  import io.netty.channel.ChannelMetadata;
  import io.netty.channel.ChannelOutboundBuffer;
  import io.netty.channel.ChannelPromise;
  import io.netty.channel.DefaultChannelConfig;
  import io.netty.channel.EventLoop;
  
  import java.net.SocketAddress;
  
  final class FailedChannel extends AbstractChannel {
      private static final ChannelMetadata METADATA = new ChannelMetadata(false);
      private final ChannelConfig config = new DefaultChannelConfig(this);
  
      FailedChannel() {
          super(null);
      }
  
      @Override
      protected AbstractUnsafe newUnsafe() {
          return new FailedChannelUnsafe();
      }
  
      @Override
      protected boolean isCompatible(EventLoop loop) {
          return false;
      }
  
      @Override
      protected SocketAddress localAddress0() {
          return null;
      }
  
      @Override
      protected SocketAddress remoteAddress0() {
          return null;
      }
  
      @Override
      protected void doBind(SocketAddress localAddress) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      protected void doDisconnect() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      protected void doClose() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      protected void doBeginRead() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      protected void doWrite(ChannelOutboundBuffer in) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public ChannelConfig config() {
          return config;
      }
  
      @Override
      public boolean isOpen() {
          return false;
      }
  
      @Override
      public boolean isActive() {
          return false;
      }
  
      @Override
      public ChannelMetadata metadata() {
          return METADATA;
      }
 
     private final class FailedChannelUnsafe extends AbstractUnsafe {
         @Override
         public void connect(SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise) {
             promise.setFailure(new UnsupportedOperationException());
         }
     }
 }