Re: AW: [sdo] Groups - HelperContext Creation (HelperContextCreation.zip) uploaded

[Frank Budinsky <frankb@ca.ibm.com>]

Hi Guys,

I have a few questions and concerns.

1. Why is HelperContextFactory an abstract class instead of an interface?
2. ImplementationResolver and DefaultImplementationResolver are not user APIs (they're SPIs), so I think they should be moved to the commonj.sdo.impl package, instead of being nested in class commonj.sdo.helper.SDO.
3. Regarding the "identifier" argument on the HelperContextFactory.createHelperContext() methods, I'm not sure it's very user friendly. If a user writes an application and just wants to start with a new (clean) HelperContext, what value should be passed for the "identifier" argument? I think SDO definitely needs a standard API for creating HelperContexts, but I'm not so sure we need SDO to also manage HelperContexts. I wouldn't expect typical users, like the one I just described, would need to call the getHelperContext(identifier) method. If I remember correctly, it is intended to help solve the Java serialization (HelperContext lookup) problem, but I think we need a better explanation of what values would be used for identifiers. For example, what if there's already a HelperContext with the requested identifier when you call createHelperContext()? How can a simple user, like the one above, use this without needing to worry about what value to use for the identifier argument?

Thanks,
Frank.

"Barack, Ron" <ron.barack@sap.com>

"Barack, Ron" <ron.barack@sap.com>

03/19/2009 09:03 AM

To	<blaise.doughan@oracle.com>, <sdo@lists.oasis-open.org>
cc
Subject	AW: [sdo] Groups - HelperContext Creation (HelperContextCreation.zip) uploaded

Hi Blaise,

We've reviewed this API, and it looks good to us.  I'm going to put this as the first discussion point on this week's agenda.


Ron




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Von: blaise.doughan@oracle.com [mailto:blaise.doughan@oracle.com] 
Gesendet: Montag, 2. März 2009 17:11
An: sdo@lists.oasis-open.org
Betreff: [sdo] Groups - HelperContext Creation (HelperContextCreation.zip) uploaded

Hello All,

I have added a zip file to the documents page containing a modified set of
SDO 3.0 classes that contain APIs to create and look up instances of
HelperContext.  These are based on the results of the virtual face to face
discussion that was held on February 19, 2009.

-Blaise

 -- Mr. Blaise Doughan

The document named HelperContext Creation (HelperContextCreation.zip) has
been submitted by Mr. Blaise Doughan to the OASIS Service Data Objects
(SDO) TC document repository.

Document Description:
An updated set of SDO APIs based on the Helper Context Creation discussion
that occured during the virtual SDO Face to Face on February 19, 2009.

The APIs include:
- SDO (New Class) for obtaining HelperContextFactory objects from multiple
vendors.
- HelperContextFactory (New Class) for obtaining instances of
HelperContext.  APIs are provided to create and access HelperContexts by a
unique identified.
- HelperProviderImpl (Deprecated & Modified), now delegates calls to
SDO and HelperContextFactory.
- Helper classes (Modified) the INSTANCE variables are now deprecated.

View Document Details:
http://www.oasis-open.org/committees/document.php?document_id=31485

Download Document:  
http://www.oasis-open.org/committees/download.php/31485/HelperContextCreation.zip


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