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src/Pegasus/ExportServer/HandlerTable.h

//%/////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001 BMC Software, Hewlett-Packard Company, IBM,
// The Open Group, Tivoli Systems
//
// 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.
//
//==============================================================================
//
// Author: Nitin Upasani, Hewlett-Packard Company (Nitin_Upasani@hp.com)
//
// Modified By:
//
//%/////////////////////////////////////////////////////////////////////////////

#include <Pegasus/Common/Config.h>
#include <cstdlib>
// #include <dlfcn.h>
#include <Pegasus/Common/Destroyer.h>
#include <Pegasus/Common/System.h>
#include "HandlerTable.h"

PEGASUS_NAMESPACE_BEGIN

HandlerTable::HandlerTable()
{

}

CIMHandler* HandlerTable::lookupHandler(const String& handlerId)
{
    for (Uint32 i = 0, n = _handlers.size(); i < n; i++)
	if (String::equal(_handlers[i].handlerId, handlerId))
	    return _handlers[i].handler;

    return 0;
}

typedef CIMHandler* (*CreateHandlerFunc)();

CIMHandler* HandlerTable::loadHandler(const String& handlerId)
{
    // Load the dynamic library:

#ifdef PEGASUS_OS_TYPE_WINDOWS
    ArrayDestroyer<char> libraryName = handlerId.allocateCString();
#else
    String unixLibName = getenv("PEGASUS_HOME");
    unixLibName += "/lib/lib";
    unixLibName += handlerId;
#ifdef PEGASUS_OS_HPUX
    unixLibName += ".sl";
#else
    unixLibName += ".so";
#endif
    ArrayDestroyer<char> libraryName = unixLibName.allocateCString();
#endif

    DynamicLibraryHandle libraryHandle = 
	System::loadDynamicLibrary(libraryName.getPointer());

    if (!libraryHandle) {
#ifdef PEGASUS_OS_TYPE_WINDOWS
	throw DynamicLoadFailed(libraryName.getPointer());
#else
        unixLibName = System::dynamicLoadError();
        ArrayDestroyer<char> errorMsg = unixLibName.allocateCString();
	throw DynamicLoadFailed(errorMsg.getPointer());
#endif
    }

    // Lookup the create handler symbol:

    String tmp = "PegasusCreateHandler_";
    tmp.append(handlerId);
    ArrayDestroyer<char> functionName = tmp.allocateCString();

    CreateHandlerFunc func = (CreateHandlerFunc)System::loadDynamicSymbol(
	libraryHandle, functionName.getPointer());

    if (!func)
	throw DynamicLookupFailed(functionName.getPointer());

    // Create the handler:

    CIMHandler* handler = func();

    if (!handler)
	throw CreateHandlerReturnedNull(
	    libraryName.getPointer(), 
	    functionName.getPointer());

    if (handler)
    {
	Entry entry;
	entry.handlerId = handlerId;
	entry.handler = handler;
	_handlers.append(entry);
    }

    return handler;
}

PEGASUS_NAMESPACE_END