content: /*
   * Copyright (C) 2013 Facebook, Inc.
   *
   * 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.airlift.drift.transport.netty.server;
  
  import io.airlift.drift.transport.server.ServerMethodInvoker;
  import io.airlift.units.DataSize;
  import io.airlift.units.Duration;
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.ChannelPipeline;
  import io.netty.channel.socket.SocketChannel;
  import io.netty.handler.ssl.SslContext;
  
  import java.util.Optional;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.function.Supplier;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static java.util.Objects.requireNonNull;
  
  public class ThriftServerInitializer
          extends ChannelInitializer<SocketChannel>
  {
      private final ServerMethodInvoker methodInvoker;
      private final DataSize maxFrameSize;
      private final Duration requestTimeout;
      private final Optional<Supplier<SslContext>> sslContextSupplier;
      private final boolean allowPlainText;
      private final boolean assumeClientsSupportOutOfOrderResponses;
      private final ScheduledExecutorService timeoutExecutor;
  
      public ThriftServerInitializer(
              ServerMethodInvoker methodInvoker,
              DataSize maxFrameSize,
              Duration requestTimeout,
              Optional<Supplier<SslContext>> sslContextSupplier,
              boolean allowPlainText,
              boolean assumeClientsSupportOutOfOrderResponses,
              ScheduledExecutorService timeoutExecutor)
      {
          requireNonNull(methodInvoker, "methodInvoker is null");
          requireNonNull(maxFrameSize, "maxFrameSize is null");
          requireNonNull(requestTimeout, "requestTimeout is null");
          requireNonNull(sslContextSupplier, "sslContextSupplier is null");
          checkArgument(allowPlainText || sslContextSupplier.isPresent(), "Plain text is not allowed, but SSL is not configured");
          requireNonNull(timeoutExecutor, "timeoutExecutor is null");
  
          this.methodInvoker = methodInvoker;
          this.maxFrameSize = maxFrameSize;
          this.requestTimeout = requestTimeout;
          this.sslContextSupplier = sslContextSupplier;
          this.allowPlainText = allowPlainText;
          this.assumeClientsSupportOutOfOrderResponses = assumeClientsSupportOutOfOrderResponses;
          this.timeoutExecutor = timeoutExecutor;
      }
  
      @Override
      protected void initChannel(SocketChannel channel)
      {
          ChannelPipeline pipeline = channel.pipeline();
  
          if (sslContextSupplier.isPresent()) {
              if (allowPlainText) {
                  pipeline.addLast(new OptionalSslHandler(sslContextSupplier.get().get()));
              }
              else {
                  pipeline.addLast(sslContextSupplier.get().get().newHandler(channel.alloc()));
              }
          }
  
          pipeline.addLast(new ThriftProtocolDetection(
                  new ThriftServerHandler(methodInvoker, requestTimeout, timeoutExecutor),
                  maxFrameSize,
                  assumeClientsSupportOutOfOrderResponses));
      }
  }
  