RE: [sca-bpel] Issue 11 - BPEL variable initialization and SCA properties

["Michael Rowley" <mrowley@bea.com>]

 

 

I looked at the Property section of the Assembly Specification.  It looks like what is there is OK.  Here it is:

 

mustSupply (optional) – whether the property value must be supplied by the component that uses the implementation – when mustSupply="true" the component must supply a value since the implementation has no default value for the property.  A default-property-value should only be supplied when mustSupply="false" (the default setting for the mustSupply attribute), since the implication of a default value is that it is used only when a value is not supplied by the using component.

 

It says that a default value should be only be supplied when mustSupply is false, but it _doesn’t_ say that a default value MUST be supplied.

 

Perhaps we could add the following to the SCA BPEL spec at line 357 (in the paragraph that describes the meaning of sca:property=”yes”):

 

“If the variable has an initialization expression (a from-spec) then that becomes the default value for the variable in cases where the SCA component does not provide a value for that property.  If a value is provided for the property, the expression is not evaluated.  If the from-spec is a literal value, where it has the following form:

 

   <from><literal>literal value</literal></from>

 

then the literal value will be represented as the default value in the component type for the process.  Any other kind of initialization expression will not be represented in the component type.”

 

Michael

 

 

-----Original Message-----
From: Alex Yiu [mailto:alex.yiu@oracle.com]
Sent: Tuesday, October 16, 2007 2:30 PM
To: Mark Ford
Cc: sca-bpel@lists.oasis-open.org; ALEX.YIU@oracle.com
Subject: [sca-bpel] Issue 11 - BPEL variable initialization and SCA properties

 

 

Issue entered.

http://www.osoa.org/jira/browse/BPEL-11

 

Regards,

Alex Yiu

 

Mark Ford wrote:

> TARGET: SCA Client and Implementation Model Specification for WS-BPEL

> 

> TITLE: BPEL variable initialization and SCA properties

> 

> DESCRIPTION: Is the target variable allowed to have an initialization

> defined within the BPEL process and if so, is this initialization ignored?

> It seems like the initialization should be allowed but not executed in the

> case where a process is packaged as an SCA and the property is provided by

> the component. It's probably also worth pointing out that the variable must

> be an element or type variable. Message variables cannot be initialized by

> an SCA property.

> 

> 

>