1043 lines
30 KiB
C++
1043 lines
30 KiB
C++
//***************************************************************************
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//
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// Copyright (c) 1997-2001 Microsoft Corporation, All Rights Reserved
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//
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// Provider.CPP
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//
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// Purpose: Implementation of Provider class
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//
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//***************************************************************************
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#include "precomp.h"
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#include <assertbreak.h>
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#include <objpath.h>
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#include <cominit.h>
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#include <brodcast.h>
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#include <createmutexasprocess.h>
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#include <stopwatch.h>
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#include <SmartPtr.h>
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#include <frqueryex.h>
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#include "FWStrings.h"
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#include "MultiPlat.h"
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// Must instantiate static members
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CHString Provider::s_strComputerName;
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////////////////////////////////////////////////////////////////////////
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//
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// Function: Provider ctor
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//
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//
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//
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// Inputs: name of this provider
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//
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// Outputs:
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//
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// Return:
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//
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// Comments: suggest that derived classes implement their provider's ctor thusly:
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//
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// MyProvider::MyProvider(const CHString& setName) :
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// Provider(setName)
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//
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// that way, a *further* derived class can specify its own name
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//
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//
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////////////////////////////////////////////////////////////////////////
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Provider::Provider( LPCWSTR a_setName, LPCWSTR a_pszNameSpace /*=NULL*/ )
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: CThreadBase(),
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m_pIMosProvider( NULL ),
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m_piClassObject( NULL ),
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m_name( a_setName ),
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m_strNameSpace( a_pszNameSpace )
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{
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// Initialize the computer name, then register with the framework.
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InitComputerName();
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CWbemProviderGlue::FrameworkLogin( a_setName, this, a_pszNameSpace );
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: Provider dtor
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//
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//
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//
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// Inputs: none.
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//
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// Outputs:
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//
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// Return:
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//
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// Comments: cleans up our pointer to the IMosProvider
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//
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////////////////////////////////////////////////////////////////////////
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Provider::~Provider( void )
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{
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// get out of the framework's hair
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CWbemProviderGlue::FrameworkLogoff( (LPCWSTR)m_name, (LPCWSTR)m_strNameSpace );
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// we can't release the interfaces here because CIMOM has a habit
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// of shutting down when it still has interface pointers open.
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/********************
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// Release the pointer returned to us by GetNamespaceConnection(), which
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// will return us an AddRefed pointer.
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if ( NULL != m_pIMosProvider )
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{
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m_pIMosProvider->Release();
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}
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// The class object is returned to us by IMOSProvider::GetObject, so
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// we should try to release it here when we're done with it.
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if ( NULL != m_piClassObject )
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{
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m_piClassObject->Release();
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}
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******************************/
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: Provider::InitComputerName
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//
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// Initializes our static computer name variable.
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//
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// Inputs: None.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: Because the idea behind creating providers is that
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// a single static instance is instantiated, this function
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// will most likely be called as part of DLL loading, we'll
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// introduce some thread safety here using a named mutex
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// but won't worry too much about it other than that.
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//
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////////////////////////////////////////////////////////////////////////
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void Provider::InitComputerName( void )
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{
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// For performance, check if the value is empty. Only if it
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// is, should we then bother with going through a thread-safe
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// static initialization. Because we are using a named mutex,
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// multiple threads will get the same kernel object, and will
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// be stop-gapped by the OS as they each acquire the mutex
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// in turn.
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if ( s_strComputerName.IsEmpty() )
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{
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CreateMutexAsProcess createMutexAsProcess(WBEMPROVIDERSTATICMUTEX);
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// Double check in case there was a conflict and somebody else
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// got here first.
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if ( s_strComputerName.IsEmpty() )
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{
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DWORD dwBuffSize = MAX_COMPUTERNAME_LENGTH + 1;
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// Make sure the string buffer will be big enough to handle the
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// value.
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LPWSTR pszBuffer = s_strComputerName.GetBuffer( dwBuffSize );
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if ( NULL != pszBuffer )
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{
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// Now grab the computer name and release the buffer, forcing
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// it to reallocate itself to the new length.
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if (!FRGetComputerName( pszBuffer, &dwBuffSize )) {
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wcscpy(pszBuffer, L"DEFAULT");
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}
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s_strComputerName.ReleaseBuffer();
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} // IF NULL != pszBuffer
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} // IF strComputerName.IsEmpty()
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} // IF strComputerName.IsEmpty()
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: Flush
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//
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// flushes out all unnecessary memory usage
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// inlcuding the (unimplemented) cache
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// and the class object we clone from
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//
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// Inputs: nope
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//
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// Outputs:
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//
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// Return: the eternal void
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
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void Provider::Flush()
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{
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// TODO: implement cache flush
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BeginWrite();
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try
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{
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if (m_piClassObject)
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{
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m_piClassObject->Release();
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m_piClassObject = NULL;
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}
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if ( NULL != m_pIMosProvider )
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{
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m_pIMosProvider->Release();
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m_pIMosProvider = NULL;
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}
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}
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catch ( ... )
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{
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EndWrite();
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throw;
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}
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EndWrite();
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: ValidateIMOSPointer
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//
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// Verifies in a threadsafe manner, that our IWBEMServices pointer
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// is okay.
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//
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// Inputs: None.
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//
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// Outputs:
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//
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// Return: TRUE/FALSE success/failure
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//
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// Comments: Requires that our NameSpace be valid.
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//
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////////////////////////////////////////////////////////////////////////
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BOOL Provider::ValidateIMOSPointer( )
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{
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// if we don't have a Namespace connection, get one. Be aware that for
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// speed's sake we are testing the value outside of a critical section, but
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// because two threads may enter this block of code simultaneously, this
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// block is testing one more time inside the critical sections.
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// if ( NULL == m_pIMosProvider )
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// {
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// BeginWrite();
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//
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// try
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// {
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//
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// // See above (it's a redundant test), but keeps us from leaking and
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// // overwriting the value twice.
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//
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// if ( NULL == m_pIMosProvider )
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// {
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// m_pIMosProvider = CWbemProviderGlue::GetNamespaceConnection( m_strNameSpace, pwszIID );
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// }
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// }
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// catch ( ... )
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// {
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// EndWrite();
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// throw;
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// }
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//
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// EndWrite();
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// }
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//
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// if (m_pIMosProvider == NULL)
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// {
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// throw CFramework_Exception(L"ValidateIMOSPointer failed");
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// }
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//
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// return ( NULL != m_pIMosProvider );
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return TRUE;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CreateNewInstance
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//
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//
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//
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// Inputs: MethodContext* - context that this instance belongs to
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//
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// Outputs:
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//
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// Return: CInstance*
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//
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// Comments: caller is responsible for memory
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//
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////////////////////////////////////////////////////////////////////////
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CInstance* Provider::CreateNewInstance( MethodContext* pMethodContext )
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{
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HRESULT hr = WBEM_S_NO_ERROR;
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CInstance* pNewInstance = NULL;
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IWbemClassObjectPtr pClassObject (GetClassObjectInterface(pMethodContext), false);
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IWbemClassObjectPtr piClone;
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hr = pClassObject->SpawnInstance(0, &piClone);
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if (SUCCEEDED(hr))
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{
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// The Instance is responsible for its own AddRef/Releasing
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pNewInstance = new CInstance(piClone, pMethodContext);
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if (pNewInstance == NULL)
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{
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throw CHeap_Exception ( CHeap_Exception :: E_ALLOCATION_ERROR ) ;
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}
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}
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else
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{
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throw CFramework_Exception(L"SpawnInstance failed", hr);
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}
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return pNewInstance;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: Commit
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//
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// sends instance to CIMOM
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//
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// Inputs: CInstance* pInstance - the instance to pass off to cimom,
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// bool bCache - should we cache this puppy? (unimplemented)
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//
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// Outputs:
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//
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// Return:
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//
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// Comments: do not reference pointer once committed, it may not exist any more!
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::Commit(CInstance* pInstance, bool bCache /* = false*/)
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{
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HRESULT hRes = WBEM_S_NO_ERROR;
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// allow derived classes to fill out extra info.
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// GetExtendedProperties(pInstance);
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hRes = pInstance->Commit();
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// TODO: Implement cache
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// if !bCache...
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// We're done with pInstance, so...
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pInstance->Release();
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return hRes;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: ExecuteQuery
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//
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//
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//
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// Inputs: IWbemContext __RPC_FAR * pCtx,
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//
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// Outputs:
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//
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// Return: HRESULT
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//
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// Comments: Calls a provider's ExecQuery function, or returns
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::ExecuteQuery( MethodContext* pContext, CFrameworkQuery& pQuery, long lFlags /*= 0L*/ )
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{
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HRESULT hr = ValidateQueryFlags(lFlags);
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// Make sure we've got Managed Object Services avaliable, as we will need
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// it to get WBEMClassObjects for constructing Instances.
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if ( SUCCEEDED(hr) && ValidateIMOSPointer( ) )
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{
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// Check to see if this is an extended query
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CFrameworkQueryEx *pQuery2 = static_cast <CFrameworkQueryEx*>(&pQuery);
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if (pQuery2->IsExtended())
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{
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// It is an extended query. Does the provider support them?
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if (FAILED(ValidateQueryFlags(WBEM_FLAG_FORWARD_ONLY)))
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{
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// We have an extended query, but the provider doesn't support it
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hr = WBEM_E_INVALID_QUERY;
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}
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}
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if (SUCCEEDED(hr))
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{
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// Tell cimom he's got work to do on the instances when we send
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// them back.
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pContext->QueryPostProcess();
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// If the client hasn't overridden the class, we get back
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// WBEM_E_PROVIDER_NOT_CAPABLE. In that case, call the enumerate, and let
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// CIMOM do the work
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::ProviderTimer);
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hr = ExecQuery(pContext, pQuery, lFlags);
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::FrameworkTimer);
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if (hr == WBEM_E_PROVIDER_NOT_CAPABLE)
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{
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// Get the instances
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::ProviderTimer);
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hr = CreateInstanceEnum(pContext, lFlags);
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::FrameworkTimer);
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}
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}
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else
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{
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hr = WBEM_E_INVALID_QUERY;
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}
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}
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return hr;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CreateInstanceEnum
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//
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//
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//
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// Inputs: IWbemContext __RPC_FAR * pCtx,
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// IWbemObjectSink __RPC_FAR * pResponseHandler
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// Outputs:
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//
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// Return:
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//
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// Comments: enumerate all instances of this class
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::CreateInstanceEnum( MethodContext* pContext, long lFlags /*= 0L*/ )
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{
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HRESULT sc = ValidateEnumerationFlags(lFlags);
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// Make sure we've got Managed Object Services avaliable, as we will need
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// it to get WBEMClassObjects for constructing Instances.
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if ( SUCCEEDED(sc) && ValidateIMOSPointer( ) )
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{
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::ProviderTimer);
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sc = EnumerateInstances( pContext, lFlags );
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PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::FrameworkTimer);
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}
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return sc;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: PutInstance
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//
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// CIMOM wants us to put this instance.
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//
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// Inputs:
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//
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// Outputs:
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//
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// Return:
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::PutInstance(const CInstance& newInstance, long lFlags /*= 0L*/)
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{
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return WBEM_E_PROVIDER_NOT_CAPABLE;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: PutInstance
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//
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// CIMOM wants us to put this instance.
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//
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// Inputs:
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//
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// Outputs:
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//
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// Return:
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::PutInstance( IWbemClassObject __RPC_FAR *pInst,
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long lFlags,
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MethodContext* pContext )
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{
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HRESULT scode = ValidatePutInstanceFlags(lFlags);
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// No need to AddRef()/Release() pInst here, since we're just
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// passing it into the CInstance object, which should take
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// care of that for us internally.
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if (SUCCEEDED(scode))
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{
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CInstancePtr pInstance (new CInstance( pInst, pContext ), false);
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if ( NULL != pInstance )
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{
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scode = PutInstance(*pInstance, lFlags);
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}
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else
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{
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throw CHeap_Exception ( CHeap_Exception :: E_ALLOCATION_ERROR ) ;
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}
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}
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return scode;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: DeleteInstance
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//
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// CIMOM wants us to delete this instance.
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//
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// Inputs:
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//
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// Outputs:
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//
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// Return:
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::DeleteInstance(const CInstance& newInstance, long lFlags /*= 0L*/)
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{
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return WBEM_E_PROVIDER_NOT_CAPABLE;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: DeleteInstance
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//
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// CIMOM wants us to put this instance.
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//
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// Inputs:
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//
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// Outputs:
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//
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// Return:
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
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HRESULT Provider::DeleteInstance( ParsedObjectPath* pParsedObjectPath,
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long lFlags,
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MethodContext* pContext )
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{
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HRESULT sc = ValidateDeletionFlags(lFlags);
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// Make sure we've got Managed Object Services avaliable, as we will
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// need it in order to create a brand new instance.
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if ( SUCCEEDED(sc) && ValidateIMOSPointer( ) )
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{
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CInstancePtr pInstance (CreateNewInstance( pContext ), false);
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// Load up the instance keys
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if ( SetKeyFromParsedObjectPath( pInstance, pParsedObjectPath ) )
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{
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sc = DeleteInstance(*pInstance, lFlags);
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}
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else
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{
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sc = WBEM_E_INVALID_OBJECT_PATH;
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}
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}
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return sc;
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}
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|
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////////////////////////////////////////////////////////////////////////
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//
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// Function: ExecMethod
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//
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// CIMOM wants us to execute this method on this instance
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//
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// Inputs:
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//
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// Outputs:
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//
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// Return:
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//
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// Comments:
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//
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////////////////////////////////////////////////////////////////////////
|
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HRESULT Provider::ExecMethod(const CInstance& pInstance,
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BSTR bstrMethodName,
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CInstance *pInParams,
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CInstance *pOutParams,
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long lFlags /*= 0L*/)
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{
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return WBEM_E_PROVIDER_NOT_CAPABLE;
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}
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|
|
////////////////////////////////////////////////////////////////////////
|
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//
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// Function: ExecMethod
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//
|
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// CIMOM wants us to Execute this method on this instance
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//
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// Inputs:
|
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//
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// Outputs:
|
|
//
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// Return:
|
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//
|
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// Comments:
|
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//
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|
////////////////////////////////////////////////////////////////////////
|
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HRESULT Provider::ExecMethod( ParsedObjectPath *pParsedObjectPath,
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BSTR bstrMethodName,
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long lFlags,
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CInstance *pInParams,
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CInstance *pOutParams,
|
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MethodContext *pContext )
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|
{
|
|
HRESULT sc = ValidateMethodFlags(lFlags);
|
|
|
|
// Make sure we've got Managed Object Services avaliable, as we will
|
|
// need it in order to create a brand new instance.
|
|
|
|
if ( SUCCEEDED(sc) && ValidateIMOSPointer( ) )
|
|
{
|
|
|
|
CInstancePtr pInstance(CreateNewInstance( pContext ), false);
|
|
|
|
if ( SetKeyFromParsedObjectPath( pInstance, pParsedObjectPath ) )
|
|
{
|
|
PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::ProviderTimer);
|
|
sc = ExecMethod(*pInstance, bstrMethodName, pInParams, pOutParams, lFlags);
|
|
PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::FrameworkTimer);
|
|
}
|
|
else
|
|
{
|
|
sc = WBEM_E_INVALID_OBJECT_PATH;
|
|
}
|
|
|
|
}
|
|
|
|
return sc;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: GetObject
|
|
//
|
|
// called by the framework in response to a GetObject from CIMOM
|
|
//
|
|
// Inputs: ParsedObjectPath* pParsedObjectPath - All the news
|
|
// thats fit to print.
|
|
// IWbemContext __RPC_FAR* pCtx
|
|
// IWbemObjectSink __RPC_FAR*pResponseHandler
|
|
//
|
|
//
|
|
// Outputs:
|
|
//
|
|
// Return:
|
|
//
|
|
// Comments:
|
|
//
|
|
////////////////////////////////////////////////////////////////////////
|
|
HRESULT Provider::GetObject( ParsedObjectPath *pParsedObjectPath,
|
|
MethodContext *pContext,
|
|
long lFlags /*= 0L*/ )
|
|
{
|
|
HRESULT hr = ValidateGetObjFlags(lFlags);
|
|
|
|
// Make sure we've got Managed Object Services avaliable, as we will
|
|
// need it in order to create a brand new instance.
|
|
|
|
if ( SUCCEEDED(hr) && ValidateIMOSPointer( ) )
|
|
{
|
|
CInstancePtr pInstance (CreateNewInstance( pContext ), false);
|
|
|
|
// Load up the instance keys
|
|
if ( SetKeyFromParsedObjectPath( pInstance, pParsedObjectPath ) )
|
|
{
|
|
// Look for per-property gets
|
|
IWbemContextPtr pWbemContext (pContext->GetIWBEMContext(), false);
|
|
|
|
CFrameworkQueryEx CQuery;
|
|
hr = CQuery.Init(pParsedObjectPath, pWbemContext, GetProviderName(), m_strNameSpace);
|
|
|
|
// Note that 'SUCCEEDED' DOESN'T mean that we have per-property gets. It
|
|
// just means that the query object was successfully initialized.
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
// Fill in key properties on query object
|
|
IWbemClassObjectPtr pWbemClassObject(pInstance->GetClassObjectInterface(), false);
|
|
CQuery.Init2(pWbemClassObject);
|
|
|
|
PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::ProviderTimer);
|
|
hr = GetObject(pInstance, lFlags, CQuery);
|
|
PROVIDER_INSTRUMENTATION_START(pContext, StopWatch::FrameworkTimer);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
hr = WBEM_E_INVALID_OBJECT_PATH;
|
|
}
|
|
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
// Account for the possibility that we have a SUCCESS code back from GetObject.
|
|
HRESULT hRes = pInstance->Commit();
|
|
hr = __max((ULONG)hRes, (ULONG)hr);
|
|
}
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: Provider::GetInstancePath
|
|
//
|
|
// Attempts to build an instance path for the supplied CInstance pointer.
|
|
//
|
|
// Inputs: const CInstance* pInstance - Instance to build path for.
|
|
//
|
|
// Outputs: CHString& strPath - Path from instance.
|
|
//
|
|
// Return: BOOL Success/Failure.
|
|
//
|
|
// Comments: This function was created to help support the internal
|
|
// short circuit we performed for obtaining local WBEM
|
|
// Provider objects. In this instance, we will use our
|
|
// computer system name, namespace and instance relative
|
|
// path to munge together a full WBEM Object Path. This
|
|
// is because only CIMOM objects will have this value set
|
|
// and when we perform our short circuit, we cut CIMOM
|
|
// out of the loop, so our instances don't have full
|
|
// object paths. This mostly helps out our association
|
|
// logic, although a weakness of this solution is that
|
|
// if the path that gets stored by CIMOM changes, we
|
|
// will then need to change this function.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////
|
|
bool Provider::GetLocalInstancePath( const CInstance *pInstance,
|
|
CHString& strPath )
|
|
{
|
|
bool fReturn = false;
|
|
CHString strRelativePath;
|
|
|
|
if (pInstance && pInstance->GetCHString( L"__RELPATH", strRelativePath ) )
|
|
{
|
|
// We may want to use the OBJPath classes to piece this
|
|
// together for us at a later time.
|
|
|
|
strPath = MakeLocalPath(strRelativePath);
|
|
|
|
fReturn = true;
|
|
}
|
|
|
|
return fReturn;
|
|
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: Provider::MakeLocalPath
|
|
//
|
|
// Builds a full instance path from a relative path
|
|
//
|
|
// Inputs: const CHString &strRelPath - Relative path
|
|
//
|
|
// Outputs:
|
|
//
|
|
// Return: CHString& strPath - Path
|
|
//
|
|
// Comments: Consider using GetLocalInstance path before using
|
|
// this function.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////
|
|
CHString Provider::MakeLocalPath( const CHString &strRelPath )
|
|
{
|
|
|
|
ASSERT_BREAK( (strRelPath.Find(L':') == -1) || ((strRelPath.Find(L'=') != -1) && (strRelPath.Find(L':') >= strRelPath.Find(L'=')) ));
|
|
|
|
CHString sBase;
|
|
|
|
sBase.Format(L"\\\\%s\\%s:%s",
|
|
(LPCWSTR)s_strComputerName,
|
|
m_strNameSpace.IsEmpty() ? DEFAULT_NAMESPACE: (LPCWSTR) m_strNameSpace,
|
|
(LPCWSTR)strRelPath);
|
|
|
|
return sBase;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: SetKeyFromParsedObjectPath
|
|
//
|
|
// called by the DeleteInstance and GetObject in order to load a
|
|
// CInstance* with the key values in an object path.
|
|
//
|
|
// Inputs: CInstance* pInstance - Instance to store
|
|
// key values in.
|
|
// ParsedObjectPath* pParsedObjectPath - All the news
|
|
// thats fit to print.
|
|
//
|
|
//
|
|
// Outputs:
|
|
//
|
|
// Return: BOOL Success/Failure
|
|
//
|
|
// Comments:
|
|
//
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
BOOL Provider::SetKeyFromParsedObjectPath( CInstance *pInstance,
|
|
ParsedObjectPath *pParsedPath )
|
|
{
|
|
BOOL fReturn = TRUE;
|
|
SAFEARRAY *pNames = NULL;
|
|
long lLBound, lUBound;
|
|
|
|
// populate instance - This exact same routine is in wbemglue.cpp. Changes here should be
|
|
// reflected there (or someone should move these two somewhere else. instance.cpp?).
|
|
for (DWORD i = 0; fReturn && i < (pParsedPath->m_dwNumKeys); i++)
|
|
{
|
|
if (pParsedPath->m_paKeys[i])
|
|
{
|
|
// If a name was specified in the form class.keyname=value
|
|
if (pParsedPath->m_paKeys[i]->m_pName != NULL)
|
|
{
|
|
fReturn = pInstance->SetVariant(pParsedPath->m_paKeys[i]->m_pName, pParsedPath->m_paKeys[i]->m_vValue);
|
|
}
|
|
else
|
|
{
|
|
// There is a special case that you can say class=value
|
|
fReturn = FALSE;
|
|
|
|
// only one key allowed in the format. Check the names on the path
|
|
if (pParsedPath->m_dwNumKeys == 1)
|
|
{
|
|
|
|
// Get the names from the object
|
|
if (m_piClassObject->GetNames(NULL, WBEM_FLAG_KEYS_ONLY, NULL, &pNames) == WBEM_S_NO_ERROR)
|
|
{
|
|
BSTR t_bstrName = NULL ;
|
|
|
|
try
|
|
{
|
|
SafeArrayGetLBound(pNames, 1, &lLBound);
|
|
SafeArrayGetUBound(pNames, 1, &lUBound);
|
|
|
|
// Only one key?
|
|
if ((lUBound - lLBound) == 0)
|
|
{
|
|
// Get the name of the key field and set it
|
|
SafeArrayGetElement(pNames, &lUBound, &t_bstrName );
|
|
|
|
fReturn = pInstance->SetVariant( t_bstrName, pParsedPath->m_paKeys[i]->m_vValue);
|
|
}
|
|
}
|
|
catch ( ... )
|
|
{
|
|
if( NULL != t_bstrName )
|
|
{
|
|
SysFreeString( t_bstrName ) ;
|
|
}
|
|
|
|
SafeArrayDestroy(pNames);
|
|
throw;
|
|
}
|
|
|
|
SafeArrayDestroy(pNames);
|
|
}
|
|
}
|
|
ASSERT_BREAK(fReturn); // somebody lied about the number of keys or the datatype was wrong
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ASSERT_BREAK(0); // somebody lied about the number of keys!
|
|
fReturn = FALSE;
|
|
}
|
|
}
|
|
|
|
return fReturn;
|
|
}
|
|
|
|
// sets the CreationClassName to the name of this provider
|
|
bool Provider::SetCreationClassName(CInstance* pInstance)
|
|
{
|
|
if (pInstance)
|
|
{
|
|
return pInstance->SetCHString(IDS_CreationClassName, m_name);
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
// flag validation - returns WBEM_E_UNSUPPORTED parameter if
|
|
// lFlags contains any flags not found in lAcceptableFlags
|
|
HRESULT Provider::ValidateFlags(long lFlags, FlagDefs lAcceptableFlags)
|
|
{
|
|
HRESULT hr = WBEM_S_NO_ERROR;
|
|
|
|
// invert the acceptable flags, which then are the UNacceptable flags
|
|
if (lFlags & ~((long)lAcceptableFlags))
|
|
hr = WBEM_E_UNSUPPORTED_PARAMETER;
|
|
else
|
|
hr = WBEM_S_NO_ERROR;
|
|
|
|
return hr;
|
|
}
|
|
// base level validation routines
|
|
// you can override these in order to support a flag
|
|
// that is unknown to the base class
|
|
HRESULT Provider::ValidateEnumerationFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, EnumerationFlags);
|
|
}
|
|
HRESULT Provider::ValidateGetObjFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, GetObjFlags);
|
|
}
|
|
HRESULT Provider::ValidateMethodFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, MethodFlags);
|
|
}
|
|
HRESULT Provider::ValidateQueryFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, QueryFlags);
|
|
}
|
|
HRESULT Provider::ValidateDeletionFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, DeletionFlags);
|
|
}
|
|
HRESULT Provider::ValidatePutInstanceFlags(long lFlags)
|
|
{
|
|
return ValidateFlags(lFlags, PutInstanceFlags);
|
|
}
|
|
|
|
IWbemClassObject* Provider::GetClassObjectInterface(MethodContext *pMethodContext)
|
|
{
|
|
IWbemClassObject *pObject = NULL;
|
|
|
|
if (ValidateIMOSPointer())
|
|
{
|
|
BOOL bWriting = TRUE;
|
|
BeginWrite();
|
|
|
|
try
|
|
{
|
|
if ( NULL == m_piClassObject )
|
|
{
|
|
bWriting = FALSE;
|
|
|
|
//calling back into winmgmt - no critsec!
|
|
EndWrite();
|
|
|
|
IWbemContextPtr pWbemContext;
|
|
|
|
if ( NULL != pMethodContext )
|
|
{
|
|
pWbemContext.Attach(pMethodContext->GetIWBEMContext());
|
|
}
|
|
|
|
IWbemServicesPtr pServices(CWbemProviderGlue::GetNamespaceConnection( m_strNameSpace, pMethodContext ), false);
|
|
|
|
|
|
HRESULT hr = pServices->GetObject( bstr_t( m_name ), 0L, pWbemContext, &pObject, NULL);
|
|
|
|
BeginWrite();
|
|
bWriting = TRUE;
|
|
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
if (m_piClassObject == NULL)
|
|
{
|
|
m_piClassObject = pObject;
|
|
pObject->AddRef();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// belt & suspenders check. Won't hurt.
|
|
m_piClassObject = NULL;
|
|
|
|
throw CFramework_Exception(L"SpawnInstance failed", hr);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pObject = m_piClassObject;
|
|
pObject->AddRef();
|
|
}
|
|
}
|
|
catch ( ... )
|
|
{
|
|
if (bWriting)
|
|
{
|
|
EndWrite();
|
|
}
|
|
|
|
if (pObject)
|
|
{
|
|
pObject->Release();
|
|
pObject = NULL;
|
|
}
|
|
|
|
throw;
|
|
}
|
|
|
|
EndWrite();
|
|
}
|
|
|
|
return pObject;
|
|
}
|
|
|
|
// If a provider wants to process queries, they should override this
|
|
HRESULT Provider::ExecQuery(MethodContext *pMethodContext, CFrameworkQuery& pQuery, long lFlags /*= 0L*/)
|
|
{
|
|
return WBEM_E_PROVIDER_NOT_CAPABLE;
|
|
}
|
|
|
|
// find and create all instances of your class
|
|
HRESULT Provider::EnumerateInstances(MethodContext* pMethodContext, long lFlags /*= 0L*/)
|
|
{
|
|
return WBEM_E_PROVIDER_NOT_CAPABLE;
|
|
}
|
|
|
|
// you will be given an object with the key properties filled in.
|
|
// you need to fill in all of the rest of the properties
|
|
HRESULT Provider::GetObject(CInstance* pInstance, long lFlags /*= 0L*/)
|
|
{
|
|
return WBEM_E_PROVIDER_NOT_CAPABLE;
|
|
}
|
|
|
|
// You will be given an object with the key properties filled in.
|
|
// You can either fill in all the properties, or check the Query object
|
|
// to see what properties are required.
|
|
HRESULT Provider::GetObject(CInstance *pInstance, long lFlags, CFrameworkQuery &Query)
|
|
{
|
|
// If we are here, the provider didn't override this method. Fall back to the older
|
|
// call.
|
|
return GetObject(pInstance, lFlags);
|
|
}
|
|
|