[ISSUE 73] What correlation support should SCA provide for callbacks? -PROPOSAL for RESOLUTION

Two for the price of One !!!!

I offer two alternative proposals for
this Issue.

PROPOSAL 1:

Resolve by Close with No Action.

Leave this up to the Implementation
Type specifications and the Bindings specifications.

PROPOSAL 2:

Resolve by adding the following to the
Assembly specification (line numbers refer to sca-assembly-1.1-spec-cd01-rev2.pdf)

Add a new section 8.2.1 following line
2459:

8.1 Correlation Support for Callbacks

Where a Bidirectional interface using
Callbacks is used between a client reference and a service provider, SCA
provides the client implementation

with the potential to correlate a callback
message received by the client with one of the original messages sent from
the client to the service provider,

so that the client can identify the
callback message as being related to an original request that was made
by the client.  This requires that some form

of correlation data is sent between
the client and the service provider and between the service provider and
the client, in association with the messages

involved in the service invocation(s)
and in the callback invocation(s).  The binding linking the client
and the service provider MUST be capable of

transmitting the correlation information
if the binding supports services with Bidirectional interfaces.

How (and whether) the correlation capability
is presented to the client implementation code is defined by the relevant
SCA Client and Implementation

specification for the implementation
type concerned.  What form the correlation information takes on the
wire between the client and the service

provider is defined by the relevant
SCA Binding specification for the binding that is used between the client
and the provider.

 

Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.

Co Chair OASIS SCA Assembly TC.

IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.

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