org.apache.hive.spark.client.rpc

Class RpcDispatcher

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.channel.SimpleChannelInboundHandler<Object>

org.apache.hive.spark.client.rpc.RpcDispatcher

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler

@InterfaceAudience.Private
public abstract class RpcDispatcher
extends io.netty.channel.SimpleChannelInboundHandler<Object>

An implementation of ChannelInboundHandler that dispatches incoming messages to an instance method based on the method signature.

A handler's signature must be of the form:

protected void handle(ChannelHandlerContext, MessageType)

Where "MessageType" must match exactly the type of the message to handle. Polymorphism is not supported. Handlers can return a value, which becomes the RPC reply; if a null is returned, then a reply is still sent, with an empty payload.

Nested Class Summary

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

io.netty.channel.ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor and Description
RpcDispatcher()

Method Summary

Methods

Modifier and Type	Method and Description
void	channelInactive(io.netty.channel.ChannelHandlerContext ctx)
protected void	channelRead0(io.netty.channel.ChannelHandlerContext ctx, Object msg)
void	exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, Throwable cause)
protected String	name() Override this to add a name to the dispatcher, for debugging purposes.

Methods inherited from class io.netty.channel.SimpleChannelInboundHandler

acceptInboundMessage, channelRead

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

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 Detail

RpcDispatcher

public RpcDispatcher()

Method Detail

name

protected String name()

Override this to add a name to the dispatcher, for debugging purposes.

channelRead0

protected final void channelRead0(io.netty.channel.ChannelHandlerContext ctx,
                Object msg)
                           throws Exception

Specified by:

channelRead0 in class io.netty.channel.SimpleChannelInboundHandler<Object>

Throws:

Exception

exceptionCaught

public final void exceptionCaught(io.netty.channel.ChannelHandlerContext ctx,
                   Throwable cause)

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

channelInactive

public final void channelInactive(io.netty.channel.ChannelHandlerContext ctx)
                           throws Exception

Specified by:

channelInactive in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelInactive in class io.netty.channel.ChannelInboundHandlerAdapter

Throws:

Exception