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BUG#:7273
TITLE: CMPI Class cache should be encapsulated and abstracted

DESCRIPTION: adding the two new files too

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// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
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#include <Pegasus/ProviderManager2/CMPI/CMPIClassCache.h>
#include <Pegasus/ProviderManager2/CMPI/CMPI_Broker.h>
#include <Pegasus/Provider/CIMOMHandle.h>
#include <Pegasus/Common/Tracer.h>

PEGASUS_NAMESPACE_BEGIN

CMPIClassCache::~CMPIClassCache()
{
    // Cleanup the class cache
    ClassCache::Iterator i=_clsCache->start();
    for (; i; i++)
    {
        delete i.value();
    }
    delete _clsCache;
}

CIMClass* CMPIClassCache::getClass(
    const CMPI_Broker *mb,
    const CIMObjectPath & cop)
{
    String clsId =
        cop.getNameSpace().getString()+":"+cop.getClassName().getString();

    CIMClass *ccp;

    {
        ReadLock readLock(_rwsemClassCache);

        if (_clsCache->lookup(clsId,ccp))
        {
            return ccp;
        }
    }

    try
    {
        WriteLock writeLock(_rwsemClassCache);

        if (_clsCache->lookup(clsId,ccp))
        {
            return ccp;
        }
                      
        CIMClass cc = ((CIMOMHandle*)mb->hdl)->getClass(
            OperationContext(),
            cop.getNameSpace(),
            cop.getClassName(),
            (bool)0,
            (bool)1,
            (bool)0,
            CIMPropertyList());

        ccp = new CIMClass(cc);
        _clsCache->insert(clsId,ccp);
        return ccp;
    }
    catch (const CIMException &e)
    {
        PEG_TRACE_STRING(
            TRC_CMPIPROVIDERINTERFACE,
            Tracer::LEVEL2,
            "Exception: " + e.getMessage());
    }
    return 0;
}

PEGASUS_NAMESPACE_END