RE: embedded CIM Instance

What about using associations instead of using embedded instances?

 

From: Kirk Augustin [mailto:[email protected]] 
Sent: Monday, August 22, 2011 9:06 AM
To: Marek Szermutzky; [email protected]
Cc: [email protected]; Karl Schopmeyer
Subject: Re: embedded CIM Instance

 

I don't think it is possible to actually handle embedded instances perfectly.

Here is some discussion back from 2005, when they were trying to propose embedded object enhancements.

http://www.openpegasus.org/pp/uploads/40/9001/Embedded_Instance_PEP_1_3.html

 

Kirk Augustin
11821 NW McNamee Rd
Portland, OR 97231

________________________________

From: Marek Szermutzky <[email protected]>
To: [email protected]
Cc: [email protected]; Karl Schopmeyer <[email protected]>
Sent: Monday, August 22, 2011 5:22 AM
Subject: Re: embedded CIM Instance

What you describe sounds a lot like Sfcb does not handle embedded instances very well. To determine if that's actually the case you could track the CIM-Xml exchanged between your client and the CIMOM. 
If it proves true that SFCB does not write the EmbeddedInstance qualifier, you should open a Bug against SFCB. 



Mit freundlichen Grüßen / Kind regards
Marek Szermutzky

Software Engineer / OpenPegasus Maintainer (PMC) and z/OS PlatformRep.
IBM Systems &Technology Group, Systems Software Development / z/OS Capacity Management and Support
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From:        Karl Schopmeyer <[email protected]> 
To:        <[email protected]>, <[email protected]> 
Date:        19.08.2011 17:18 
Subject:        Re: embedded CIM Instance 

________________________________




What to the strings look like and what does the cim/xml look like?  If the cim/xml does not contain the embeddedobject attribute for the property, the client could not determine if the strings received are actually embedded objects.  Remember that in cim/xml today.

1. EmbeddedInstance and object properties are defined in mof as a string type with a qualifier to identify them as embedded objects or instances.
2. The embedded instance is normally encoded in the cim/xml protocol/encoding as xml with the xml special characters escaped and the embedded Object attribute in the cimx/ml to tell the receiver that this is an embedded object.

3. In pegasus, we actually added an embeddedinstance DataType and attempt in the client infrastructure to decode your object if the attribute is attached.

Note that we are finishing some extensions to our command line client tool cimcli that adds capabilities for embedded instance/object creation, display, etc. and that will shortly be in Pegasus head of tree  It can be seen now as bug 9007 (preliminary) and PEP 361.

Karl
Thanks for your message at 11:53 PM 8/18/2011. Your message was: 
Hi all,
  We need to return an array of CIM Instances in a vendor extension method in our CMPI Provider. we have defined the method as follows:

uint32 xxx(

[IN (false), OUT, Description ("xxx"), EmbeddedInstance( "Our_Class")]

string instances[]);

>From provider code we are adding out argument of type CMPI_instanceA. 
Our client uses SBLIM 2.0.9.3 to get CIM Instances. When we are using OpenPegasus as a CIMOM, client receives the data as an array of CIM Instances properly. But when we use SFCB in Vmware ESX as CIMOM . Client is receiving it as array of strings only, not as CIM Instances.

Any help?


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