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Subject: Proposed resolution to issue BINDINGS-48


My proposal to resolve issue BINDINGS-48 is as follows:

Remove the last paragraph of section 3 that describes limitations on binding attribute and intent combinations.

Replace section 5, policy, with the following text:

The JMS binding provides attributes that control the sending of messages, requests from references and replies from services.  These values can be set directly on the binding element for a particular service or reference, or they can be set using policy intents. An example of setting these via intents is shown later.

JMS binding implementations MUST support the JMS intent. This intent MUST always be included in the @alwaysProvides attribute of the JMS bindingType.

The following standard intents can also be supported by JMS binding implementations, by inclusion in the @mayProvides attribute of the JMS bindingType:

o   atLeastOnce
o   atMostOnce
o   ordered

The atLeastOnce, atMostOnce and ordered intent are defined in the SCA Policy Specification document in section 8, "Reliability Policy".

Deployers/assemblers can configure NON_PERSISTENT for @JMSDeliveryMode in order to provide higher performance with a decreased quality of service. A binding.jms element configured in this way cannot satisfy the "atLeastOnce" policy intent. The SCA runtime MUST raise an error for this invalid combination at deployment time.


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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