Re: question on CBEnumInstances

Hi!

On the function,

inline static CMPIEnumeration *CBEnumInstances(

const CMPIBroker * mb,

const CMPIContext * ctx,

const CMPIObjectPath * op,

const char **properties,

CMPIStatus * rc)

the input parameter "properties"
may hold a property list, meaning you can filter all instances to only
return with the properties named in "properties".

Today the CMPI interface does not allow
to filter for certain instances based on a property value on CBEnumInstances().

What you could do instead to achieve
your target is to execute a query using the

CMPIStatus (*execQuery) (CMPIInstanceMI*,const
CMPIContext*,const CMPIResult*,const CMPIObjectPath*,const char*,const
char*);

or its corresponding macro version:

/**

Query the enumeration
of instances of the class (and subclasses) defined

by <op>
using <query> expression.

@param mb Broker this
pointer.

@param ctx Context object

@param op ObjectPath containing
namespace and classname components.

@param query Query expression

@param lang Query Language

@param rc Output: Service
return status (suppressed when NULL).

@return Resulting eumeration
of Instances.

*/

inline static CMPIEnumeration *CBExecQuery(

const CMPIBroker * mb,

const CMPIContext * ctx,

const CMPIObjectPath *
op,

const char *query,

const char *lang,

CMPIStatus * rc);

The most performant way for this to
work would be if the provider implementing the class you want to query
does support queries natively and is capable to execute on queries.

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:
kamal jeera <[email protected]>

To:
[email protected]

Date:
25.10.2010 19:56

Subject:
Re: question
on CBEnumInstances

----------

forgot to add that, the reason I want to that is.....

the class that I am trying to do enumerateIntstance has tons of instances,
and it is taking lot of time to to go through all of those and chose the
one I want.

It would be nice if CBEnumInstances can filter out the results.

On Mon, Oct 25, 2010 at 10:50 AM, kamal jeera <[email protected] >
wrote:

Hi All,

I have a question on CBEnumInstances.

inline static CMPIEnumeration *CBEnumInstances(

const CMPIBroker * mb,

const CMPIContext * ctx,

const CMPIObjectPath * op,

const char **properties,

CMPIStatus * rc)

I am trying to enumerate instances of a class.

I would like to filter my results based on certain property value,
how can I do that?

Lets for example I would like to filter results from CBEnumInstances to
just show the instances of class which has property has GatheringType =
3

I am not sure if can specify value for const char **properties.

thanks,

Hemanth