Github user sohami commented on a diff in the pull request:

    https://github.com/apache/drill/pull/773#discussion_r111651798
  
    --- Diff: 
exec/rpc/src/main/java/org/apache/drill/exec/rpc/AbstractRemoteConnection.java 
---
    @@ -224,4 +237,67 @@ public void close() {
         }
       }
     
    +  /**
    +   * Helps to add all the required security handler's after negotiation 
for encryption is completed.
    +   * <p>
    +   *  Handler's that are added are:
    +   *    <li>  SaslDecryptionHandler
    +   *    <li>  LengthFieldBasedFrameDecoder Handler
    +   *    <li>  SaslEncryptionHandler
    +   *    <li>  ChunkCreationHandler
    +   * </p>
    +   * <p>
    +   *  If encryption is enabled ChunkCreationHandler is always added 
irrespective of chunkMode enabled or not.
    +   *  This helps to make a generic encryption handler.
    +   * </p>
    +   */
    +  @Override
    +  public void addSecurityHandlers() {
    +
    +    final ChannelPipeline channelPipeline = getChannel().pipeline();
    +    channelPipeline.addFirst("SaslDecryptionHandler", new 
SaslDecryptionHandler(saslBackend, getWrappedChunkSize(),
    --- End diff --
    
    Moved all the handlers names as part of RpcConstants and using that in 
BasicClient/BasicServer as well.


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