Action item on: how errors generated by an Intermediary can be pulled

Action item on: how 
errors generated by an Intermediary can be pulled:

 

Error MPCs for 
pulling intermediary errors:

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An Intermediary MAY 
configure an MPC for pulling, called an "error MPC", that is intended only for 
reporting errors. In such a case, the error MPC MUST NOT be used for 
posting User messages. This intermediary may then post error messages (signal 
messages with an eb:Error element) that it has itself generated, to the error 
MPC. As for errors generated by end-points, several eb:Error elements may be 
grouped in the same Signal message. Such an error Signal message - called here 
an "intermediary error message" - intended for the pull error MPC MUST contain 
the EmptyMessagePartitionChannel eb:Error (EBMS:0006)  element in addition to other eb:Error 
element(s), indicating to a PullRequest sender that no User message is available 
on this MPC. The eb:Error generated by the intermediary SHOULD contain enough 
information in its eb:Error/ErrorDetail element to identify the 
intermediary.

The intermediary MUST then respond to a PullRequest 
authorized for the error MPC, with an intermediary error message. If no 
error message is posted on the error MPC, a single EmptyMessagePartitionChannel eb:Error will be returned as response to a 
pull request.

 A chain of intermediaries MAY be 
configured to route intermediary error messages over a multi-hop path, as 
described in Section 2.5.2.2, Multihop One-Way , case 3b. In such a 
configuration, the PullRequest signal may be sent by another intermediary, that 
will in turn post the received intermediary error message on its local error MPC 
(with same identifier) waiting for it to be pulled again, acting as a 
Sender for this error message, as described in the "Pull-on-Pull" forwarding 
pattern (section 2.6.3). Such a multi-hop path for pulling errors, may also 
reach an end-point MSH and be used to carry errors generated by this end-point. 
In such a case, the end-point MUST comply with above rules and only use this MPC 
for posting error messages.

 

-jacques