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HandlerLoader.h

/* -*- C++ -*- */
/*
 *   Copyright 2003-2004 The Apache Software Foundation.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */

#if !defined(__HANDLERLOADER_H_INCLUDED__)
#define __HANDLERLOADER_H_INCLUDED__

#include <axis/server/MessageData.h>
#include <axis/server/GDefine.h>
#include <axis/server/WrapperClassHandler.h>
#include "SharedObject.h"

#include <map>
#include <string>

using namespace std;

#define CREATE_FUNCTION "GetClassInstance"
#define DELETE_FUNCTION "DestroyInstance"

typedef int (* CREATE_OBJECT) (BasicHandler** inst);
typedef int (* DELETE_OBJECT) (BasicHandler* inst);

#if defined(USE_LTDL)
#include <ltdl.h>
#define DLHandler lt_dlhandle
#elif defined(WIN32)
#include <windows.h>
#define DLHandler HINSTANCE
#define RTLD_LAZY 0
#else //Linux
#include <dlfcn.h>
#define DLHandler void*
#endif

//status codes
#define HANDLER_INIT_FAIL       1
#define CREATION_FAILED         2
#define LOADLIBRARY_FAILED      3
#define LIBRARY_PATH_EMPTY      4
#define HANDLER_NOT_LOADED      5
#define HANDLER_BEING_USED      6
#define GET_HANDLER_FAILED      7
#define WRONG_HANDLER_TYPE      8
#define NO_HANDLERS_CONFIGURED  9
/*
 *   @class HandlerLoader
 *   @brief
 *
 *
 *
 *   @author Susantha Kumara (skumara@virtusa.com)
 */

class HandlerLoader:protected SharedObject
{
    private:
        class HandlerInformation
        {
            public:
                string m_sLib;
                int m_nLoadOptions;
                DLHandler m_Handler;
                CREATE_OBJECT m_Create;
                DELETE_OBJECT m_Delete;
                int m_nObjCount;
            public:
                HandlerInformation ()
                {
                    m_sLib = "";
                    m_nObjCount = 0;
                }
            };

            map <int, HandlerInformation*>m_HandlerInfoList;

    public:
        int CreateHandler (BasicHandler** pHandler, int nLibId);
        int DeleteHandler (BasicHandler* pHandler, int nLibId);
        HandlerLoader ();
        ~HandlerLoader ();
    private:
        int LoadLib (HandlerInformation* pHandlerInfo);
        int UnloadLib (HandlerInformation* pHandlerInfo);
};


#endif 

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