Package com.linkedin.davinci.blobtransfer.server

Class P2PFileTransferServerHandler

java.lang.Object
io.netty.channel.ChannelHandlerAdapter
io.netty.channel.ChannelInboundHandlerAdapter
io.netty.channel.SimpleChannelInboundHandler<io.netty.handler.codec.http.FullHttpRequest>
com.linkedin.davinci.blobtransfer.server.P2PFileTransferServerHandler
All Implemented Interfaces:
io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler
@Sharable public class P2PFileTransferServerHandler extends io.netty.channel.SimpleChannelInboundHandler<io.netty.handler.codec.http.FullHttpRequest>
The server-side Netty handler to process requests for P2P file transfer. It's shareable among multiple requests since it doesn't maintain states.

  • Nested Class Summary

    Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

    io.netty.channel.ChannelHandler.Sharable

  • Constructor Summary

    Constructors
    Constructor
    Description
    P2PFileTransferServerHandler(String baseDir, int blobTransferMaxTimeoutInMin, BlobSnapshotManager blobSnapshotManager)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    channelActive(io.netty.channel.ChannelHandlerContext ctx)
     
    protected void
    channelRead0(io.netty.channel.ChannelHandlerContext ctx, io.netty.handler.codec.http.FullHttpRequest httpRequest)
    This method is called with the request that is received from the client.
    void
    exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, Throwable cause)
     
    void
    sendMetadata(io.netty.channel.ChannelHandlerContext ctx, BlobTransferPartitionMetadata metadata)
    Send metadata for the given blob transfer request
    void
    userEventTriggered(io.netty.channel.ChannelHandlerContext ctx, Object event)
    Netty calls this function when events that we have registered for, occur (in this case we are specifically waiting for IdleStateEvent so that we close connections that have been idle too long - maybe due to client failure)

    Methods inherited from class io.netty.channel.SimpleChannelInboundHandler

    acceptInboundMessage, channelRead

    Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

    channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged

    Methods inherited from class io.netty.channel.ChannelHandlerAdapter

    ensureNotSharable, handlerAdded, handlerRemoved, isSharable

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface io.netty.channel.ChannelHandler

    handlerAdded, handlerRemoved

  • Constructor Details

    • P2PFileTransferServerHandler

      public P2PFileTransferServerHandler(String baseDir, int blobTransferMaxTimeoutInMin, BlobSnapshotManager blobSnapshotManager)

  • Method Details

    • channelActive

      public void channelActive(io.netty.channel.ChannelHandlerContext ctx)
      Specified by:
      channelActive in interface io.netty.channel.ChannelInboundHandler
      Overrides:
      channelActive in class io.netty.channel.ChannelInboundHandlerAdapter

    • channelRead0

      protected void channelRead0(io.netty.channel.ChannelHandlerContext ctx, io.netty.handler.codec.http.FullHttpRequest httpRequest) throws Exception
      This method is called with the request that is received from the client. It validates the incoming request, and currently it only supports GET
      Specified by:
      channelRead0 in class io.netty.channel.SimpleChannelInboundHandler<io.netty.handler.codec.http.FullHttpRequest>
      Parameters:
      ctx - the ChannelHandlerContext which this SimpleChannelInboundHandler belongs to
      httpRequest - the message to handle
      Throws:
      Exception

    • userEventTriggered

      public void userEventTriggered(io.netty.channel.ChannelHandlerContext ctx, Object event) throws Exception
      Netty calls this function when events that we have registered for, occur (in this case we are specifically waiting for IdleStateEvent so that we close connections that have been idle too long - maybe due to client failure)
      Specified by:
      userEventTriggered in interface io.netty.channel.ChannelInboundHandler
      Overrides:
      userEventTriggered in class io.netty.channel.ChannelInboundHandlerAdapter
      Parameters:
      ctx - The ChannelHandlerContext that can be used to perform operations on the channel.
      event - The event that occurred.
      Throws:
      Exception

    • exceptionCaught

      public void exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, Throwable cause) throws Exception
      Specified by:
      exceptionCaught in interface io.netty.channel.ChannelHandler
      Specified by:
      exceptionCaught in interface io.netty.channel.ChannelInboundHandler
      Overrides:
      exceptionCaught in class io.netty.channel.ChannelInboundHandlerAdapter
      Throws:
      Exception

    • sendMetadata

      public void sendMetadata(io.netty.channel.ChannelHandlerContext ctx, BlobTransferPartitionMetadata metadata) throws com.fasterxml.jackson.core.JsonProcessingException
      Send metadata for the given blob transfer request
      Parameters:
      ctx - the channel context
      metadata - the metadata to be sent
      Throws:
      com.fasterxml.jackson.core.JsonProcessingException