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HandlerLoader.h

00001 /* -*- C++ -*- */
00002 
00003 /*
00004  * The Apache Software License, Version 1.1
00005  *
00006  *
00007  * Copyright (c) 2002 The Apache Software Foundation.  All rights
00008  * reserved.
00009  *
00010  * Redistribution and use in source and binary forms, with or without
00011  * modification, are permitted provided that the following conditions
00012  * are met:
00013  *
00014  * 1. Redistributions of source code must retain the above copyright
00015  *    notice, this list of conditions and the following disclaimer.
00016  *
00017  * 2. Redistributions in binary form must reproduce the above copyright
00018  *    notice, this list of conditions and the following disclaimer in
00019  *    the documentation and/or other materials provided with the
00020  *    distribution.
00021  *
00022  * 3. The end-user documentation included with the redistribution,
00023  *    if any, must include the following acknowledgment:
00024  *       "This product includes software developed by the
00025  *        Apache Software Foundation (http://www.apache.org/)."
00026  *    Alternately, this acknowledgment may appear in the software itself,
00027  *    if and wherever such third-party acknowledgments normally appear.
00028  *
00029  * 4. The names "SOAP" and "Apache Software Foundation" must
00030  *    not be used to endorse or promote products derived from this
00031  *    software without prior written permission. For written
00032  *    permission, please contact apache@apache.org.
00033  *
00034  * 5. Products derived from this software may not be called "Apache",
00035  *    nor may "Apache" appear in their name, without prior written
00036  *    permission of the Apache Software Foundation.
00037  *
00038  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00039  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00040  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00041  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00042  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00043  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00044  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00045  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00046  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00047  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00048  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00049  * SUCH DAMAGE.
00050  * ====================================================================
00051  *
00052  * This software consists of voluntary contributions made by many
00053  * individuals on behalf of the Apache Software Foundation.  For more
00054  * information on the Apache Software Foundation, please see
00055  * <http://www.apache.org/>.
00056  *
00057  *
00058  */
00059 
00060 #if !defined(__HANDLERLOADER_H_INCLUDED__)
00061 #define __HANDLERLOADER_H_INCLUDED__
00062 
00063 #include "../common/MessageData.h"
00064 #include "../common/GDefine.h"
00065 #include "../common/WrapperClassHandler.h"
00066 #include "SharedObject.h"
00067 
00068 #include <map>
00069 #include <string>
00070 
00071 using namespace std;
00072 
00073 #define CREATE_FUNCTION "GetClassInstance"
00074 #define DELETE_FUNCTION "DestroyInstance"
00075 
00076 typedef int (* CREATE_OBJECT)(BasicHandler **inst);
00077 typedef int (* DELETE_OBJECT)(BasicHandler *inst);
00078 
00079 #ifdef WIN32
00080 #include <windows.h>
00081 #define DLHandler HINSTANCE
00082 #define RTLD_LAZY 0
00083 #else //Linux
00084 #include <dlfcn.h>
00085 #define DLHandler void*
00086 #endif
00087 
00088 //status codes
00089 #define HANDLER_INIT_FAIL       1
00090 #define CREATION_FAILED         2
00091 #define LOADLIBRARY_FAILED      3
00092 #define LIBRARY_PATH_EMPTY      4
00093 #define HANDLER_NOT_LOADED      5
00094 #define HANDLER_BEING_USED      6
00095 #define GET_HANDLER_FAILED      7
00096 #define WRONG_HANDLER_TYPE      8
00097 #define NO_HANDLERS_CONFIGURED  9
00098 
00099 
00108 class HandlerLoader : protected SharedObject
00109 {
00110 private:
00111         class HandlerInformation
00112         {
00113         public:
00114                 string m_sLib;
00115                 int m_nLoadOptions;
00116                 DLHandler m_Handler;
00117                 CREATE_OBJECT m_Create;
00118                 DELETE_OBJECT m_Delete;
00119                 int m_nObjCount;
00120         public:
00121                 HandlerInformation()
00122                 {
00123                         m_sLib = "";
00124                         m_nObjCount = 0;
00125                 }
00126         };
00127 
00128         map<int, HandlerInformation*> m_HandlerInfoList;
00129 
00130 public:
00131         int CreateHandler(BasicHandler** pHandler, int nLibId);
00132         int DeleteHandler(BasicHandler* pHandler, int nLibId);
00133         HandlerLoader();
00134         ~HandlerLoader();
00135 private:
00136         int LoadLib(HandlerInformation* pHandlerInfo);
00137         int UnloadLib(HandlerInformation* pHandlerInfo);
00138 };
00139 
00140 
00141 #endif //__HANDLERLOADER_H_INCLUDED__

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