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

DESCRIPTION: adding the two new files too

//%2006////////////////////////////////////////////////////////////////////////
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// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
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// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec Corporation; The Open Group.
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//%/////////////////////////////////////////////////////////////////////////////
#ifndef _CMPIClassCache_H_
#define _CMPIClassCache_H_

#include <Pegasus/Common/String.h>
#include <Pegasus/Common/CIMClass.h>
#include <Pegasus/Common/HashTable.h>
#include <Pegasus/Common/ReadWriteSem.h>

PEGASUS_NAMESPACE_BEGIN

class CMPI_Broker;

class CMPIClassCache
{

public:
    CMPIClassCache()
    {
        _clsCache = new ClassCache();
    };

    // clean-up cache data
    ~CMPIClassCache();

    // a single function as point of control for now
    // target is to reduce the critical section as much as possible
    CIMClass* getClass(
        const CMPI_Broker *mb,
        const CIMObjectPath &cop);

private:

    typedef HashTable<String, CIMClass *,
        EqualFunc<String>,  HashFunc<String> > ClassCache;

    ClassCache * _clsCache;
    // auto-initialisation due to being on the stack
    ReadWriteSem _rwsemClassCache;

};

PEGASUS_NAMESPACE_END

#endif