OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

sca-assembly message

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]

Subject: Re: [sca-assembly] A look at use-cases for composition with eventing,alternate approaches to make them work better


Thanks for taking the time to do this. I have a few questions/comments 
on the material (listed below). It would be a good idea to have you 
present this on one of our calls. I should also note that we should 
evaluate this from the POV of existing usecases that we want to solve.

1) page 1, last two bullets: Isn't that the same? IOW, if you promote 
channels won't they have to appear in the CT of the composite that they 
occur in?

2) page 2, diagram for PC#1, following current WD, but avoiding global 
channels and bindings:
why are there two channels in the outermost and middle composite? Not 
that this is wrong, but one channel would suffice and be simpler.

Another alternative for the same is to not have any channels in the 
innermost and middle composite, promote all the consumer/producers all 
the way to the outermost composite and have a single channel that 
connects C, F and the promoted consumer/producer.

3) page 3, direct wires: I see this as problematic. It does not scale 
well and has problems with dynamic systems. Consider domain-level 
components that want to use eventing and everyone connected to the same 
channel (as a producer and as a consumer). Any single component being 
undeployed (or deployed) causes changes to all other components.

4) page 4, PC#1: Option: Channels as components, coupled 
I'm not sure I understand this option. More explanation would help.

5) page 6, PC#2, per WD: avoiding global channels and bindings:
You don't need three channels in the outermost composite. One channel 
would suffice.

6) page 7, PC#2, Using channels as components, producer and consumer tied:
Not sure I understand this. Seems like direct wiring.

7) page 8, PC#3, per WD avoiding global channels and bindings:
You can simplify this by using only one channel in the outer composite.


On 8/4/2010 10:29 PM, Eric Johnson wrote:
>   I've had an action item to pull together use cases relevant for
> discussing the various options around how to think about composing with
> eventing.
> Well, maybe it wasn't an official action item at first, but I took it as
> a useful exercise to apply some rigor to what I proposed, and actually
> put my proposal through its paces, along with a bunch of other options,
> to see how they all fare.
> I definitely tried to do this fairly. it is possible that I've
> overlooked some aspect of the current WD, or that I didn't implement
> other options fairly, or that there are yet alternate ways that we could
> try to tackle the problem.
> Which, by way of introduction, I mean to say, please send back comments,
> arrows, darts, alternate use-cases/scenarios you'd like to see me pursue
> in any of the different approaches.  Or, please feel free to suggest
> alternate approaches.
> Unfortunately, I'm on vacation next week, so I'll be tardy in catching
> up with whatever discussion we might have, at least any that happens
> after Friday afternoon.
> Attached, please find both the PDF and ODG format.
> -Eric.
> ---------------------------------------------------------------------
> To unsubscribe from this mail list, you must leave the OASIS TC that
> generates this mail.  Follow this link to all your TCs in OASIS at:
> https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]