content: /*
   * Copyright 1999-2022 Alibaba Group Holding Ltd.
   *
   * Licensed 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
   *
   *      http://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.grpc.netty.shaded.io.grpc.netty;
  
  import com.alipay.sofa.jraft.util.internal.ReferenceFieldUpdater;
  import com.alipay.sofa.jraft.util.internal.Updaters;
  import io.grpc.internal.ServerStream;
  import io.grpc.netty.shaded.io.netty.channel.Channel;
  
  /**
   * Get netty channel.
   *
   * @author Weizhan▪Yun
   * @date 2023/1/4 21:08
   */
  public class NettyChannelHelper {
      
      private static final ReferenceFieldUpdater<NettyServerStream, WriteQueue> WRITE_QUEUE_GETTER = Updaters.newReferenceFieldUpdater(
              NettyServerStream.class, "writeQueue");
      
      private static final ReferenceFieldUpdater<WriteQueue, Channel> CHANNEL_GETTER = Updaters.newReferenceFieldUpdater(
              WriteQueue.class, "channel");
      
      public static Channel getChannel(final ServerStream stream) {
          if (stream instanceof NettyServerStream) {
              return CHANNEL_GETTER.get(WRITE_QUEUE_GETTER.get((NettyServerStream) stream));
          }
          return null;
      }
  }
  