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

Class NettyProtocol

java.lang.Object
org.apache.flink.runtime.io.network.netty.NettyProtocol
public class NettyProtocol extends Object
Defines the server and client channel handlers, i.e. the protocol, used by netty.

  • Method Details

    • getServerChannelHandlers

      public org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler[] getServerChannelHandlers()
      Returns the server channel handlers. 
       +-------------------------------------------------------------------+
 |                        SERVER CHANNEL PIPELINE                    |
 |                                                                   |
 |    +----------+----------+ (3) write  +----------------------+    |
 |    | Queue of queues     +----------->| Message encoder      |    |
 |    +----------+----------+            +-----------+----------+    |
 |              /|\                                 \|/              |
 |               | (2) enqueue                       |               |
 |    +----------+----------+                        |               |
 |    | Request handler     |                        |               |
 |    +----------+----------+                        |               |
 |              /|\                                  |               |
 |               |                                   |               |
 |   +-----------+-----------+                       |               |
 |   | Message+Frame decoder |                       |               |
 |   +-----------+-----------+                       |               |
 |              /|\                                  |               |
 +---------------+-----------------------------------+---------------+
 |               | (1) client request               \|/
 +---------------+-----------------------------------+---------------+
 |               |                                   |               |
 |       [ Socket.read() ]                    [ Socket.write() ]     |
 |                                                                   |
 |  Netty Internal I/O Threads (Transport Implementation)            |
 +-------------------------------------------------------------------+
      Returns:
      channel handlers

    • getClientChannelHandlers

      public org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler[] getClientChannelHandlers()
      Returns the client channel handlers. 
           +-----------+----------+            +----------------------+
     | Remote input channel |            | request client       |
     +-----------+----------+            +-----------+----------+
                 |                                   | (1) write
 +---------------+-----------------------------------+---------------+
 |               |     CLIENT CHANNEL PIPELINE       |               |
 |               |                                  \|/              |
 |    +----------+----------+            +----------------------+    |
 |    | Request handler     +            | Message encoder      |    |
 |    +----------+----------+            +-----------+----------+    |
 |              /|\                                 \|/              |
 |               |                                   |               |
 |    +----------+------------+                      |               |
 |    | Message+Frame decoder |                      |               |
 |    +----------+------------+                      |               |
 |              /|\                                  |               |
 +---------------+-----------------------------------+---------------+
 |               | (3) server response              \|/ (2) client request
 +---------------+-----------------------------------+---------------+
 |               |                                   |               |
 |       [ Socket.read() ]                    [ Socket.write() ]     |
 |                                                                   |
 |  Netty Internal I/O Threads (Transport Implementation)            |
 +-------------------------------------------------------------------+
      Returns:
      channel handlers