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PEP#: 072
TITLE: [HP-RK] Out-of-Process Provider Support

DESCRIPTION:

Added a hasActiveProviders() method to the ProviderManager and ProviderManagerRouter classes.  This method indicates whether the specified entity has any providers loaded/initialized.  The Out-of-Process Provider feature can use this method to determine whether any providers are active in an agent process so that the agent process can be terminated when it is idle.

The existing unloadIdleProviders() method was also reworked.  In the previous implementation, the ProviderManager implementations allocated a thread from the MessageQueueService to unload idle providers.  This was changed so that the ProviderManagerService allocates the thread instead before calling a ProviderManager's unloadIdleProviders method.  The previous implementation assumed that a MessageQueueService had been constructed in the process with the ProviderManagers.  This assumption is incorrect in the Out-of-Process Provider implementation.

//%2003////////////////////////////////////////////////////////////////////////
//
// 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.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// furnished to do so, subject to the following conditions:
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// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
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// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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//==============================================================================
//
// Author: Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)
//
// Modified By:
//
//%/////////////////////////////////////////////////////////////////////////////

#ifndef Pegasus_ProviderManagerRouter_h
#define Pegasus_ProviderManagerRouter_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/Message.h>
#include <Pegasus/ProviderManager2/Linkage.h>

PEGASUS_NAMESPACE_BEGIN

class PEGASUS_PPM_LINKAGE ProviderManagerRouter
{
public:
    ProviderManagerRouter();
    virtual ~ProviderManagerRouter();

    /**
        Process the specified message by routing it to the appropriate
        ProviderManager.  Note: This operation may take a long time to
        complete and should be called on a non-critical thread.
     */
    virtual Message* processMessage(Message* message) = 0;

    /**
        Indicates whether any of the active ProviderManagers managed by this
        ProviderManagerRouter has an active (e.g., loaded/initialized)
        provider.  If no providers are active, this ProviderManagerRouter
        may be destructed without harm.
     */
    virtual Boolean hasActiveProviders() = 0;

    /**
        Unload idle providers in all active ProviderManagers.
        Note: This operation may take a long time to complete and should
        be called on a non-critical thread.
     */
    virtual void unloadIdleProviders() = 0;
};

PEGASUS_NAMESPACE_END

#endif