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BUG#: 4906
TITLE: Improved handling of OOP indication provider module failure is needed

DESCRIPTION: Added a callback in the ProviderManagerService, to be called when failure of an Out-Of-Process provider module is detected.  The ProviderManagerService logs a generic message, and notifies the IndicationService of the module failure.  The IndicationService determines if any active subscriptions were affected, updates its Active Subscriptions hash table, and responds to the ProviderManagerService with the number of affected subscriptions.  If any subscriptions were affected, the ProviderManagerService updates the provider module status to Degraded, and logs a more specific warning message.

//%2006////////////////////////////////////////////////////////////////////////
//
// 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.;
// IBM Corp.; EMC Corporation, The Open Group.
// 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.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//==============================================================================
//
// Author: Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)
//         Jenny Yu, Hewlett-Packard Company (jenny_yu@hp.com)
//
// Modified By:
//
//%/////////////////////////////////////////////////////////////////////////////

#ifndef Pegasus_OOPProviderManagerRouter_h
#define Pegasus_OOPProviderManagerRouter_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/String.h>
#include <Pegasus/Common/HashTable.h>
#include <Pegasus/Common/CIMMessage.h>
#include <Pegasus/Common/IPC.h>

#include <Pegasus/ProviderManager2/ProviderManagerRouter.h>
#include <Pegasus/ProviderManager2/ProviderManager.h>
#include <Pegasus/ProviderManager2/Linkage.h>

PEGASUS_NAMESPACE_BEGIN

typedef void (*PEGASUS_PROVIDERMODULEFAIL_CALLBACK_T)(const String &,
    const String &, Uint16);

class ProviderAgentContainer;

typedef HashTable<String, ProviderAgentContainer*, EqualFunc<String>,
    HashFunc<String> > ProviderAgentTable;

class PEGASUS_PPM_LINKAGE OOPProviderManagerRouter
    : public ProviderManagerRouter
{
public:
    OOPProviderManagerRouter(
        PEGASUS_INDICATION_CALLBACK_T indicationCallback,
        PEGASUS_RESPONSE_CHUNK_CALLBACK_T responseChunkCallback,
        PEGASUS_PROVIDERMODULEFAIL_CALLBACK_T providerModuleFailCallback);

    virtual ~OOPProviderManagerRouter();

    virtual Message* processMessage(Message* message);

    virtual Boolean hasActiveProviders();
    virtual void unloadIdleProviders();

private:
    //
    // Private methods
    //

    /** Unimplemented */
    OOPProviderManagerRouter();
    /** Unimplemented */
    OOPProviderManagerRouter(const OOPProviderManagerRouter&);
    /** Unimplemented */
    OOPProviderManagerRouter& operator=(const OOPProviderManagerRouter&);

    /**
        Return a pointer to the ProviderAgentContainer for the specified
        module instance and requesting user.  If no appropriate
        ProviderAgentContainer exists, one is created in an uninitialized state.
     */
    ProviderAgentContainer* _lookupProviderAgent(
        const CIMInstance& providerModule,
        CIMRequestMessage* request);

    /**
        Return an array of pointers to ProviderAgentContainers for the
        specified moduleName.
     */
    Array<ProviderAgentContainer*> _lookupProviderAgents(
        const String& moduleName);

    /**
        Send the specified CIMRequestMessage to all initialized Provider
        Agents in the _providerAgentTable.
     */
    CIMResponseMessage* _forwardRequestToAllAgents(CIMRequestMessage* request);

    //
    // Private data
    //

    /**
        Callback function to which all generated indications are sent for
        processing.
     */
    PEGASUS_INDICATION_CALLBACK_T _indicationCallback;

    /**
        Callback function to which all response chunks are sent for processing.
     */
    PEGASUS_RESPONSE_CHUNK_CALLBACK_T _responseChunkCallback;

    /**
        Callback function to be called upon detection of failure of a
        provider module.
     */
    PEGASUS_PROVIDERMODULEFAIL_CALLBACK_T _providerModuleFailCallback;

    /**
        The _providerAgentTable contains a ProviderAgentContainer entry for
        each of the Provider Agent processes for which a request has been
        processed.  ProviderAgentContainer objects are persistent; once one
        is created it is never deleted.
     */
    ProviderAgentTable _providerAgentTable;
    /**
        The _providerAgentTableMutex must be locked whenever the
        _providerAgentTable is accessed.
     */
    Mutex _providerAgentTableMutex;
};

PEGASUS_NAMESPACE_END

#endif