com.lambdaworks.redis.protocol
Class ConnectionWatchdog

java.lang.Object
  org.jboss.netty.channel.SimpleChannelUpstreamHandler
      com.lambdaworks.redis.protocol.ConnectionWatchdog

All Implemented Interfaces:

ChannelHandler, ChannelUpstreamHandler, TimerTask

public class ConnectionWatchdog
extends SimpleChannelUpstreamHandler
implements TimerTask

A netty ChannelHandler responsible for monitoring the channel and reconnecting when the connection is lost.

Author:

Will Glozer

Nested Class Summary

Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

Constructor Summary

ConnectionWatchdog(ClientBootstrap bootstrap, ChannelGroup channels, Timer timer)
Create a new watchdog that adds to new connections to the supplied ChannelGroup and establishes a new Channel when disconnected, while reconnect is true.

Method Summary

void	channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e)
void	channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e)
void	exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
void	run(Timeout timeout) Reconnect to the remote address that the closed channel was connected to.
void	setReconnect(boolean reconnect)

Methods inherited from class org.jboss.netty.channel.SimpleChannelUpstreamHandler

channelBound, channelDisconnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, messageReceived, writeComplete

Methods inherited from class java.lang.Object

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

Constructor Detail

ConnectionWatchdog

public ConnectionWatchdog(ClientBootstrap bootstrap,
                          ChannelGroup channels,
                          Timer timer)

Create a new watchdog that adds to new connections to the supplied ChannelGroup and establishes a new Channel when disconnected, while reconnect is true.

Parameters:

bootstrap - Configuration for new channels.

channels - ChannelGroup to add new channels to.

timer - Timer used for delayed reconnect.

Method Detail

setReconnect

public void setReconnect(boolean reconnect)

channelConnected

public void channelConnected(ChannelHandlerContext ctx,
                             ChannelStateEvent e)
                      throws Exception

Overrides:

channelConnected in class SimpleChannelUpstreamHandler

Throws:

Exception

channelClosed

public void channelClosed(ChannelHandlerContext ctx,
                          ChannelStateEvent e)
                   throws Exception

Overrides:

channelClosed in class SimpleChannelUpstreamHandler

Throws:

Exception

exceptionCaught

public void exceptionCaught(ChannelHandlerContext ctx,
                            ExceptionEvent e)
                     throws Exception

Overrides:

exceptionCaught in class SimpleChannelUpstreamHandler

Throws:

Exception

run

public void run(Timeout timeout)
         throws Exception

Reconnect to the remote address that the closed channel was connected to. This creates a new ChannelPipeline with the same handler instances contained in the old channel's pipeline.

Specified by:

run in interface TimerTask

Parameters:

timeout - Timer task handle.

Throws:

Exception - when reconnection fails.