org.apache.flink.runtime.io.network.netty

Class NettyMessageClientDecoderDelegate

java.lang.Object

org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerAdapter

org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

org.apache.flink.runtime.io.network.netty.NettyMessageClientDecoderDelegate

All Implemented Interfaces:

org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler, org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandler

public class NettyMessageClientDecoderDelegate
extends org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

Decodes messages from the received netty buffers. This decoder assumes the messages have the following format: +-----------------------------------+--------------------------------+ | FRAME_HEADER || MESSAGE_HEADER | DATA BUFFER (Optional) | +-----------------------------------+--------------------------------+

This decoder decodes the frame header and delegates the following work to the corresponding message decoders according to the message type. During this process The frame header and message header are only accumulated if they span received multiple netty buffers, and the data buffer is copied directly to the buffer of corresponding input channel to avoid more copying.

The format of the frame header is +------------------+------------------+--------+ | FRAME LENGTH (4) | MAGIC NUMBER (4) | ID (1) | +------------------+------------------+--------+

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler

org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler.Sharable

Method Summary

Modifier and Type	Method and Description
void	channelActive(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx)
void	channelInactive(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx) Releases resources when the channel is closed.
void	channelRead(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx, Object msg)

Methods inherited from class org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class org.apache.flink.shaded.netty4.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 org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Method Detail

channelActive

public void channelActive(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx)
                   throws Exception

Specified by:

channelActive in interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandler

Overrides:

channelActive in class org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

Throws:

Exception

channelInactive

public void channelInactive(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx)
                     throws Exception

Releases resources when the channel is closed. When exceptions are thrown during processing received netty buffers, CreditBasedPartitionRequestClientHandler is expected to catch the exception and close the channel and trigger this notification.

Specified by:

channelInactive in interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandler

Overrides:

channelInactive in class org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

Parameters:

ctx - The context of the channel close notification.

Throws:

Exception

channelRead

public void channelRead(org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext ctx,
                        Object msg)
                 throws Exception

Specified by:

channelRead in interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandler

Overrides:

channelRead in class org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

Throws:

Exception