com.linkedin.r2.netty.handler.http2

Class Http2ProtocolUpgradeHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.channel.ChannelDuplexHandler

com.linkedin.r2.netty.handler.http2.Http2ProtocolUpgradeHandler

All Implemented Interfaces:

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

public class Http2ProtocolUpgradeHandler
extends io.netty.channel.ChannelDuplexHandler

A handler that triggers the clear text upgrade to HTTP/2 upon adding to pipeline by sending an initial HTTP OPTIONS request with connection upgrade headers. Calls to #write and #flush are suspended util the upgrade is complete. Handler removes itself upon upgrade success. Handler listens to upstream HttpClientUpgradeHandler.UpgradeEvent event for h2c upgrade signals and sets the upgrade promise accordingly.

Nested Class Summary

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

io.netty.channel.ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor and Description
Http2ProtocolUpgradeHandler(io.netty.channel.ChannelPromise upgradePromise)

Method Summary

Modifier and Type	Method and Description
void	channelActive(io.netty.channel.ChannelHandlerContext ctx)
void	channelInactive(io.netty.channel.ChannelHandlerContext ctx)
void	exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, java.lang.Throwable cause)
static void	processChannelActive(io.netty.channel.ChannelHandlerContext ctx, org.slf4j.Logger log, io.netty.channel.ChannelPromise upgradePromise)
void	userEventTriggered(io.netty.channel.ChannelHandlerContext ctx, java.lang.Object evt)

Methods inherited from class io.netty.channel.ChannelDuplexHandler

bind, close, connect, deregister, disconnect, flush, read, write

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelRead, 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 Detail

Http2ProtocolUpgradeHandler

public Http2ProtocolUpgradeHandler(io.netty.channel.ChannelPromise upgradePromise)

Method Detail

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

processChannelActive

public static void processChannelActive(io.netty.channel.ChannelHandlerContext ctx,
                                        org.slf4j.Logger log,
                                        io.netty.channel.ChannelPromise upgradePromise)

userEventTriggered

public void userEventTriggered(io.netty.channel.ChannelHandlerContext ctx,
                               java.lang.Object evt)

Specified by:

userEventTriggered in interface io.netty.channel.ChannelInboundHandler

Overrides:

userEventTriggered in class io.netty.channel.ChannelInboundHandlerAdapter

channelInactive

public void channelInactive(io.netty.channel.ChannelHandlerContext ctx)

Specified by:

channelInactive in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelInactive in class io.netty.channel.ChannelInboundHandlerAdapter

exceptionCaught

public void exceptionCaught(io.netty.channel.ChannelHandlerContext ctx,
                            java.lang.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