code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.stack.server.transport.tcp;
  
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.socket.SocketChannel;
  import org.eclipse.milo.opcua.stack.core.transport.TransportProfile;
  import org.eclipse.milo.opcua.stack.server.UaStackServer;
  import org.eclipse.milo.opcua.stack.server.transport.RateLimitingHandler;
  import org.eclipse.milo.opcua.stack.server.transport.uasc.UascServerHelloHandler;
  
  public class OpcServerTcpChannelInitializer extends ChannelInitializer<SocketChannel> {
  
      private final UaStackServer stackServer;
  
      public OpcServerTcpChannelInitializer(UaStackServer stackServer) {
          this.stackServer = stackServer;
      }
  
      @Override
      protected void initChannel(SocketChannel channel) {
          stackServer.registerConnectedChannel(channel);
  
          channel.closeFuture().addListener(future -> stackServer.unregisterConnectedChannel(channel));
  
          channel.pipeline().addLast(RateLimitingHandler.getInstance());
          channel.pipeline().addLast(new UascServerHelloHandler(stackServer, TransportProfile.TCP_UASC_UABINARY));
      }
  
  }
  