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Kafka, mail # user - could an Encoder/Decoder be stateful?


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RE: could an Encoder/Decoder be stateful?
Rob Withers 2013-05-17, 05:06
Could the producer be adapted to support the interface of the consumer?

Thanks,
rob

> -----Original Message-----
> From: Jun Rao [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, May 16, 2013 10:04 PM
> To: [EMAIL PROTECTED]
> Subject: Re: could an Encoder/Decoder be stateful?
>
> The encoder instance can't be shared in different producers since it's
> instantiated through java reflection. Decoder instance can actually be
shared
> by different consumers since it's passed in directly through the consumer
api.
>
> Thanks,
>
> Jun
>
>
> On Thu, May 16, 2013 at 5:58 AM, Withers, Robert
> <[EMAIL PROTECTED]>wrote:
>
> > Is there a way to share an encoder instance, or inject shared state,
> > across producers/consumers?  Guice?
> > ________________________________________
> > From: Jun Rao [[EMAIL PROTECTED]]
> > Sent: Wednesday, May 15, 2013 11:02 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: could an Encoder/Decoder be stateful?
> >
> > Each producer/consumer uses a single instance of the encoder/decoder.
> >
> > Thanks,
> >
> > Jun
> >
> >
> > On Wed, May 15, 2013 at 7:20 PM, Rob Withers <[EMAIL PROTECTED]>
> wrote:
> >
> > > Or is the same instance used for each (un)marshaling?  It would be
> > > nice
> > to
> > > have a cache and a duplicateMsgChecker function, from the app above
> > > to ensure transactional guarantees, and object ref substitutions
> > > during (de)serialization, to enable durable distributed objects and
> promises.
> > >
> > >
> > >
> > > Thanks,
> > >
> > > rob
> > >
> > >
> >