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From Rob Godfrey <rob.j.godf...@gmail.com>
Subject Re: Question on amqp 1.0 payload Type ??
Date Fri, 02 Aug 2013 08:10:45 GMT
On 2 August 2013 09:35, Rakesh Kushwaha <kushwaha.r@gmail.com> wrote:

> My Question was on format , if for amqp value we have <source=*> that means
> it can have both BINARY and LIST kind data type .
>
> then why we needed DATA and AMQP SEQUENCE .
>
>
As I answered before: data and sequence allow for the case where the size
of the data is not known up front by the sending application. AmqpValue
requires that you know the size before sending.

-- Rob


> Regards,
> Rakesh
>
>
> On Thu, Aug 1, 2013 at 6:54 PM, Rob Godfrey <rob.j.godfrey@gmail.com>
> wrote:
>
> > Yes indeed Gordon, thank you for clarifying
> >
> > -- Rob
> >
> >
> > On 1 August 2013 15:01, Gordon Sim <gsim@redhat.com> wrote:
> >
> > > On 08/01/2013 01:52 PM, Rob Godfrey wrote:
> > >
> > >> Data and AmqpSequence allow the sender to start sending data without
> > >> knowing how many bytes / values the data is going to consist of.  This
> > >> allows for streaming scenarios where the size of the data is not known
> > up
> > >> front.
> > >>
> > >> Note also that there is no bound to the size of Data or AmqpSequence,
> > >> whereas an AmqpValue will always be bounded by the largest AMQP data
> > type
> > >> -
> > >> i.e. 4Gb (not that I would ever recommend sending a single message of
> > >> greater than 4Gb).
> > >>
> > >
> > > Just to clarify, each individual section of type Data or AmqpSequence
> is
> > > bounded and has its size encoded upfront. The ability to stream and/or
> > send
> > > unbounded amounts of data comes through sending multiple such sections
> in
> > > the same message. Right? (Whereas only a single AmqpValue section is
> > > allowed per message).
> > >
> > >
> > >
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> >
>

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