From: McDonald, Ira (imcdonald@sharplabs.com)
Date: Wed Dec 07 2005 - 17:09:44 EST
Hi folks, Wednesday (7 December 2005)
After a thorough review by Bill Wagner at today's WIMS telecon...
The Enterprise Management sequence diagram is broken - it shows both
Managers and Agents initiating operation _requests_ in the SAME session
- which is impossible - because HTTP is NOT a peer-to-peer protocol.
Further, the current WIMS ExecuteAction definition is broken - because
it REQUIRES that two sessions (in opposite directions) must be used to
complete a single immediate action - this design flaw is because we
tried to leverage the SendReports operation in the WIMS Agent Interface.
Therefore, below is a new simplified ExecuteAction operation.
While this solves the problem of two sessions (with serious firewall and
security constraints because of opposite directions), it also requires
a few global edits to sections 6.4, 6.5, or 6.6. See below.
Cheers,
- Ira
PS - I'll revise my plaintext Enterprise Management sequence diagram
and the associated numbered notes based on this change. I'll also have
to do a global edit for documentation in the Schedule XML Schema.
Ira McDonald (Musician / Software Architect)
Blue Roof Music / High North Inc
PO Box 221 Grand Marais, MI 49839
phone: +1-906-494-2434
email: imcdonald@sharplabs.com
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6.3.4 ExecuteAction
ExecuteAction (managerURI : URI, agentReference : AgentReference,
action : Action) statusString : StatusString,
unsupportedElements : UnsupportedElements,
report : Report
Description:
Sends an request to process a single WIMS action to a WIMS Agent.
The receiving WIMS Agent:
(a) MUST immediately validate this action request;
(b) MUST immediately attempt to process any well-formed action;
(c) MUST send a response with a Report of results from this action;
(d) MUST NOT send any SendReports or SendAlerts due to this action
(instead use 'statusString' in ExecuteAction response above).
Method Support:
WIMS Agent - OPTIONAL to support
WIMS Manager - OPTIONAL to support
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** WARNING: Do not make these edits outside the specified sections. **
(1) In section 6.4 and 6.5 only:
Change:
SendReports operation
To:
SendReports request or ExecuteAction response
(2) In section 6.4 and 6.5 only:
Change:
a SendReports to
To:
a SendReports request or ExecuteAction response to
(3) One place in section 6.6 only:
Change:
WIMS SendAlerts operation only
To:
WIMS ExecuteAction response containing a Report or a
WIMS SendAlerts request containing an Alert - only
^
[because the only is limited to the SendAlerts case - state
changes are always confirmed by ExecuteAction now]
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