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Subject: Updated proposal for issue BINDINGS-40



I propose that we resolve issue BINDINGS-40 as follows:

This proposed resolution applies to JMS binding spec cd01

-------------------------------------------------

1) ConnectionFactory and ActivationSpec are mutually exclusive within a <binding.jms> or <response> element.
This is reflected in the text, but not in the schema.  


Update the schema for the binding.jms element to put the CF and AS in a choice element:

<sequence>
   ...
   <choice minOccurs="0">
      <element name="connectionFactory" type="sca:ConnectionFactory"/>
      <element name="activationSpec" type="sca:ActivationSpec"/>
   </choice>
   ...

Update the schema for the Response element to put the CF and AS in a choice element:

<complexType name="Response">

   <sequence>
     <element name="destination" type="sca:Destination" minOccurs="0"/>

      <choice minOccurs="0">
         <element name="connectionFactory" type="sca:ConnectionFactory"/>
         <element name="activationSpec" type="sca:ActivationSpec"/>
      </choice>
   </sequence>
</complexType>


2) When specifying a ConnectionFactory in a <binding.jms> element, the Destination is mandatory.
This is not reflected. Update required:

line 188 add: "When this element is present, the destination element MUST also be present"

I don't think this can be enforced via schema because the Destination element may optionally be specified with the ActivationSpec and no ConnectionFactory.


3) When specifying a ConnectionFactory in a <response> element, the Destination is optional.
This is implicit, although the meaning of the destination is not clear. Need to add some clarification:

line 195 add: "for a service, this destination is used to send response to messages that have a null value for the JMSReplyTo destination. For a reference, this destination is used to receive reply messages".

Note that the RFC language that describes this is included in the message exchange patterns section.

Don't need any XML schema update for this as Destination is already optional.


4) When specifying an ActivationSpec, Destination is optional; when creating resources if not specified the system provides a Destination, otherwise if specified must be consistent with the ActivationSpec.

line 191 add: "If a destination element is also specified it MUST refer to the same JMS destination as the activationSpec. "

XML schema cannot enforce this rule as it cannot see within the activationSpec properties.


5) A service <response> must not specify an ActivationSpec; a reference <binding.jms> must not specify an ActivationSpec.
(I don't believe XML schema can enforce this as it cannot know whether the binding is applied to a reference or service.
)

line 191 add: This element MUST NOT be present when the binding is being used for an SCA reference.

line 202 add: This element MUST NOT be present when the binding is being used for an SCA service.

-------------------------------------------------


Regards, Simon


Simon Holdsworth
STSM, SCA Bindings Architect; Master Inventor; OASIS SCA Bindings TC Chair
MP 211, IBM UK Labs, Hursley Park, Winchester SO21 2JN, UK
Tel +44-1962-815059 (Internal 245059) Fax +44-1962-816898
Internet - Simon_Holdsworth@uk.ibm.com





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