content: /*
   * Copyright (c) 2019 abc123lzf <abc123lzf@126.com>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  package com.lzf.flyingsocks.misc;
  
  import com.lzf.flyingsocks.protocol.Message;
  import com.lzf.flyingsocks.protocol.SerializationException;
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.ChannelHandler;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelOutboundHandlerAdapter;
  import io.netty.channel.ChannelPromise;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  @ChannelHandler.Sharable
  public class FSMessageOutboundEncoder extends ChannelOutboundHandlerAdapter {
      private static final Logger log = LoggerFactory.getLogger("FSMessageOutboundEncoder");
  
      public static final String HANDLER_NAME = "FSMessageOutboundEncoder";
  
      public static final FSMessageOutboundEncoder INSTANCE = new FSMessageOutboundEncoder();
  
      private FSMessageOutboundEncoder() {
          super();
      }
  
      @Override
      public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
          if (msg instanceof Message) {
              Message message = (Message) msg;
  
              try {
                  ByteBuf buf = message.serialize(ctx.alloc());
                  ctx.write(buf, promise);
              } catch (SerializationException e) {
                  log.error("Serialize exception occur, with type: {}", message.getClass().getName(), e);
              }
          } else {
              ctx.write(msg, promise);
          }
      }
  
      @Override
      public boolean isSharable() {
          return true;
      }
  }
  