Re: asynchronous processing

Hi Craig,

Craig Landry wrote:
> I am curious what people are using for asynchronous processing and
> queues in Jini.  I am used to a J2EE world where you just drop things
> into a JMS queue so my first thought is to run independent JMS servers
> and have those register themselves as services.  It also looks like
> something could be rigged up with JavaSpaces, but I don't see any
> persistence offered with that so it seems like there is risk for data

The JavaSpaces spec is open in this area to allow implementation
latitude however I will make specific mention of the following paragraph
of the spec under Transactions and ACID properties:

"Persistence is not a required property of JavaSpaces technology
implementations. A transient implementation that does not preserve its
contents between system crashes is a proper implementation of the
JavaSpace interface's contract, and may be quite useful. If you choose
to perform operations on such a space, your transactions will guarantee
as much durability as the JavaSpaces service allows for all its data,
which is all that any transaction system can guarantee."

And then I'll say that most implementations I'm aware of provide both
transient and persistent options.

> loss should machines crash etc.  Perhaps that is a misunderstanding on
> my part though.
>

With my coaching hat on I'd say less misunderstanding more not enough
research however the materials are somewhat scattered which makes
research harder to do.

> So my question: What are people using for asynchronous processing with Jini?
>

JavaSpaces and JMS :)

> Thanks.
>
> I should also note that I currently only have email access one day per
> week, so I will be slow to respond to any replies.
>

Hope that helps,

Dan.

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