Re: question on CBEnumInstances

thanks much Marek! I will check that out.



On Tue, Oct 26, 2010 at 3:48 AM, Marek Szermutzky <[email protected]>wrote:

> 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 &lt;op&gt; using &lt;query&gt; 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]*<[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
>
>
>
>