(SOLVED)Re: How to properly handle decoder chain in netty?

[Jiang Bian]

Nice. It's clear now.

Thanks,

Jiang

Frederic Bregier wrote:
> 
> As far as I understand Netty, "all" means that the handler instance is
> unique and shared among
> all channels, so a stateless handler.
> "one" means the contrary, that is to say the handler instance is unique BY
> channel and therefore not shared among all channels, so a statefull
> handler.
> In a pipeline, you can mix "all" and "one" different handlers without any
> problem.
> 
> In your case, the decoder handler is a statefull handler since it keeps
> the previously received bytes that were not consumed by previous decode
> method calls. So this one is a "one" statefull handler. There is in fact a
> variable that should not be shared among different channels in your
> handler, you just don't know it because it is in the implementation of the
> FrameDecoder which masks it and simply show you the decode() method.
> 
> HTH,
> Frederic
> 
> 
> Jiang Bian wrote:
>> 
>> Frederic -
>> Thanks, but I thought ChannelPipelineCoverage("all") means the handler is
>> stateless or the member variable of the handler is designed to be shared.
>> Since I don't have any member variable in the handler, it's stateless,
>> isn't it?
>> 
>> Did I misunderstand the doc? 
>> http://www.jboss.org/file-access/default/members/netty/freezone/api/3.0/org/jboss/netty/channel/ChannelPipelineCoverage.html
>> 
>> Thanks again for your help!
>> 
>> Jiang
>> 
> 
> 

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