New Issue 215: Conflicting Receive in Parallel Foreach?

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Issue 215: Conflicting Receive in Parallel Foreach?

Status: received
Date added: 4 Jun 2005
Categories: Partner Links
Date submitted: 03 June 2005
Submitter: Danny van der Rijn
Description:

A la Yuzo's issue 208, we now have another case that I'm confused about. Consider the following:

foreach  parallel="yes"
	receive partnerlink="foo" operation="bar"

This will be more likely if, say, I have an "asynchronous" operation with my partners:

operation request
operation reply

I have N partnerlinks, 1 for each of my N partners, on which I send the request operation, but I only need 1 partnerlink to receive "reply" on.

So the loop would really look like:

foreach parallel="yes"
	scope
		partnerlink name="foo"
		assign from="$partnerEPRArray[$foreachIndex]" to="foo"
		invoke parterlink="foo"
		receive partnerlink="me"

or something like that. But the part that comes into conflict is the simplified pseudo-code snippet above.

Q1: Wouldn't that cause a conflicting receive fault?
Q2: If not, why not?
Q3: If so, do we solve this?
Q4: If not, do we put text in the spec explaining the problem, and why we don't fix it?
Changes: 4 Jun 2005 - new issue

Tony

	Tony Fletcher Technical Advisor Choreology Ltd. 68, Lombard Street, London EC3V 9L J UK
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Issue 215: Conflicting Receive in Parallel Foreach?