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BUG#: 5095
TITLE: JMPI Windows Run-Time Check Failure #3 - The variable 'pv' is being used without being defined

DESCRIPTION:
If the JVM is unable to be loaded, then pv.jProvider is not initialized.  This
results in the above message.

Also, it should throw a slightly more informative error 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: Chip Vincent (cvincent@us.ibm.com)
//
// Modified By:
//     Mark Hamzy (hamzy@us.ibm.com)
//     Nag Boranna, Hewlett-Packard Company(nagaraja_boranna@hp.com)
//     Yi Zhou, Hewlett-Packard Company(yi_zhou@hp.com)
//     Mike Day, IBM (mdday@us.ibm.com)
//     Adrian Schuur, IBM (schuur@de.ibm.com)
//     Josephine Eskaline Joyce, IBM (jojustin@in.ibm.com) for PEP#101
//
//%/////////////////////////////////////////////////////////////////////////////

#include "JMPIProviderModule.h"

#include <Pegasus/Common/FileSystem.h>
#include <Pegasus/Common/MessageLoader.h> //l10n
#include <Pegasus/Config/ConfigManager.h>
#include <Pegasus/ProviderManager2/JMPI/JMPIProvider.h>
#include <Pegasus/ProviderManager2/JMPI/JMPIProviderManager.h>

PEGASUS_NAMESPACE_BEGIN

JMPIProviderModule::JMPIProviderModule (const String & fileName,
                                        const String & interfaceName)
    : _fileName (fileName),
      _interfaceName (interfaceName),
      _ref_count (0),
      _library (0)
{
   Uint32 i = fileName.find (".jar:");

   if (i == PEG_NOT_FOUND)
   {
      String msg = "Invalid Location format for Java providers: " + fileName;

      throw PEGASUS_CIM_EXCEPTION_L (CIM_ERR_FAILED, msg);
   }

   String jar = fileName.subString (0, i + 4);

   _className = fileName.subString (i + 5);

   if (jar[0] != '/')
      _fileName = JMPIProviderManager::resolveFileName (jar);
   else
      _fileName = jar;
}

JMPIProviderModule::~JMPIProviderModule (void)
{
}

ProviderVector JMPIProviderModule::load (const String & providerName)
{
   ProviderVector  pv  = { 0, 0 };
   JvmVector      *jv  = NULL;
   JNIEnv         *env = JMPIjvm::attachThread (&jv);

   if (env)
   {
      pv.jProvider = JMPIjvm::getProvider (env,
                                           _fileName,
                                           _className,
                                           providerName.getCString (),
                                           &pv.jProviderClass);
      JMPIjvm::detachThread ();
   }
   else
   {
      throw PEGASUS_CIM_EXCEPTION_L (CIM_ERR_FAILED,
                                     MessageLoaderParms ("ProviderManager.JMPI.INIT_JVM_FAILED",
                                                         "Could not initialize the JVM (Java Virtual Machine) runtime environment."));
   }

   if (pv.jProvider == 0)
   {
      String s0 = "ProviderLoadFailure";

      throw Exception (MessageLoaderParms ("ProviderManager.JMPIProviderModule.CANNOT_LOAD_LIBRARY",
                                           "$0 ($1:$2):Cannot load library",
                                           s0,
                                           _fileName,
                                           providerName));
   }

   _ref_count++;

   return pv;
}

void JMPIProviderModule::unloadModule (void)
{
   if (_ref_count.decAndTestIfZero ())
   {
      if (_library != 0)
      {
         System::unloadDynamicLibrary (_library);

         _library = 0;
      }
   }
}

PEGASUS_NAMESPACE_END