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#include "StdAfx.h"
#include "Math.h"
#include "EventService.h"
#include "DataBaseEngine.h"

//////////////////////////////////////////////////////////////////////////

//宏定义
_COM_SMARTPTR_TYPEDEF(IADORecordBinding,__uuidof(IADORecordBinding));

//效验结果宏
#define EfficacyResult(hResult) { if (FAILED(hResult)) _com_issue_error(hResult); }

//////////////////////////////////////////////////////////////////////////

//构造函数
CADOError::CADOError()
{
	m_enErrorType=ErrorType_Nothing;
}

//析构函数
CADOError::~CADOError()
{
}

//接口查询
void * __cdecl CADOError::QueryInterface(const IID & Guid, DWORD dwQueryVer)
{
	QUERYINTERFACE(IADOError,Guid,dwQueryVer);
	QUERYINTERFACE_IUNKNOWNEX(IADOError,Guid,dwQueryVer);
	return NULL;
}

//设置错误
void CADOError::SetErrorInfo(enADOErrorType enErrorType, LPCTSTR pszDescribe)
{
	//设置错误
	m_enErrorType=enErrorType;
	m_strErrorDescribe=pszDescribe;

	//抛出错误
	throw QUERY_ME_INTERFACE(IADOError);

	return;
}

//////////////////////////////////////////////////////////////////////////

//构造函数
CDataBase::CDataBase() : m_dwResumeConnectCount(30L),m_dwResumeConnectTime(30L)
{
	//状态变量
	m_dwConnectCount=0;
	m_dwConnectErrorTime=0L;

	//创建对象
	m_DBCommand.CreateInstance(__uuidof(Command));
	m_DBRecordset.CreateInstance(__uuidof(Recordset));
	m_DBConnection.CreateInstance(__uuidof(Connection));

	//效验数据
	ASSERT(m_DBCommand!=NULL);
	ASSERT(m_DBRecordset!=NULL);
	ASSERT(m_DBConnection!=NULL);
	if (m_DBCommand==NULL) throw TEXT("数据库命令对象创建失败");
	if (m_DBRecordset==NULL) throw TEXT("数据库记录集对象创建失败");
	if (m_DBConnection==NULL) throw TEXT("数据库连接对象创建失败");

	//设置变量
	m_DBCommand->CommandType=adCmdStoredProc;

	return;
}

//析构函数
CDataBase::~CDataBase()
{
	//关闭连接
	CloseConnection();

	//释放对象
	m_DBCommand.Release();
	m_DBRecordset.Release();
	m_DBConnection.Release();

	return;
}

//接口查询
void * __cdecl CDataBase::QueryInterface(const IID & Guid, DWORD dwQueryVer)
{
	QUERYINTERFACE(IDataBase,Guid,dwQueryVer);
	QUERYINTERFACE_IUNKNOWNEX(IDataBase,Guid,dwQueryVer);
	return NULL;
}

//打开连接
bool __cdecl CDataBase::OpenConnection()
{
	//连接数据库
	try
	{
		//关闭连接
		CloseConnection();

		//连接数据库
		EfficacyResult(m_DBConnection->Open(_bstr_t(m_strConnect),L"",L"",adConnectUnspecified));
		m_DBConnection->CursorLocation=adUseClient;
		m_DBCommand->ActiveConnection=m_DBConnection;

		//设置变量
		m_dwConnectCount=0L;
		m_dwConnectErrorTime=0L;

		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//关闭记录
bool __cdecl CDataBase::CloseRecordset()
{
	try 
	{
		if (IsRecordsetOpened()) EfficacyResult(m_DBRecordset->Close());
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//关闭连接
bool __cdecl CDataBase::CloseConnection()
{
	try
	{
		CloseRecordset();
		if ((m_DBConnection!=NULL)&&(m_DBConnection->GetState()!=adStateClosed))
		{
			EfficacyResult(m_DBConnection->Close());
		}
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//重新连接
bool __cdecl CDataBase::TryConnectAgain(bool bFocusConnect, CComError * pComError)
{
	try
	{
		//判断重连
		bool bReConnect=bFocusConnect;
		if (bReConnect==false)
		{
			DWORD dwNowTime=(DWORD)time(NULL);
			if ((m_dwConnectErrorTime+m_dwResumeConnectTime)>dwNowTime) bReConnect=true;
		}
		if ((bReConnect==false)&&(m_dwConnectCount>m_dwResumeConnectCount)) bReConnect=true;

		//设置变量
		m_dwConnectCount++;
		m_dwConnectErrorTime=(DWORD)time(NULL);
		if (bReConnect==false)
		{
			if (pComError!=NULL) SetErrorInfo(ErrorType_Connect,GetComErrorDescribe(*pComError));
			return false;
		}

		//重新连接
		OpenConnection();
		return true;
	}
	catch (IADOError * pIADOError)
	{
		//重新连接错误
		if (pComError!=NULL) SetErrorInfo(ErrorType_Connect,GetComErrorDescribe(*pComError));
		else throw pIADOError;
	}

	return false;
}

//设置信息
bool __cdecl CDataBase::SetConnectionInfo(LPCTSTR szIP, WORD wPort, LPCTSTR szData, LPCTSTR szName, LPCTSTR szPass)
{
	//效验参数 
	ASSERT(szIP!=NULL);
	ASSERT(szData!=NULL);
	ASSERT(szName!=NULL);
	ASSERT(szPass!=NULL);

	//构造连接字符串
	m_strConnect.Format(TEXT("Provider=SQLOLEDB.1;Password=%s;Persist Security Info=True;User ID=%s;Initial Catalog=%s;Data Source=%s,%ld;"),
		szPass,szName,szData,szIP,wPort);

	return true;
}

//是否连接错误
bool __cdecl CDataBase::IsConnectError()
{
	try 
	{
		//状态判断
		if (m_DBConnection==NULL) return true;
		if (m_DBConnection->GetState()==adStateClosed) return true;

		//参数判断
		long lErrorCount=m_DBConnection->Errors->Count;
		if (lErrorCount>0L)
		{
	        ErrorPtr pError=NULL;
			for(long i=0;i<lErrorCount;i++)
			{
				pError=m_DBConnection->Errors->GetItem(i);
				if (pError->Number==0x80004005) return true;
			}
		}

		return false;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//是否打开
bool __cdecl CDataBase::IsRecordsetOpened()
{
	if (m_DBRecordset==NULL) return false;
	if (m_DBRecordset->GetState()==adStateClosed) return false;
	return true;
}

//往下移动
void __cdecl CDataBase::MoveToNext()
{
	try 
	{ 
		m_DBRecordset->MoveNext(); 
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//移到开头
void __cdecl CDataBase::MoveToFirst()
{
	try 
	{ 
		m_DBRecordset->MoveFirst(); 
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//是否结束
bool __cdecl CDataBase::IsEndRecordset()
{
	try 
	{
		return (m_DBRecordset->EndOfFile==VARIANT_TRUE); 
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return true;
}

//获取数目
long __cdecl CDataBase::GetRecordCount()
{
	try
	{
		if (m_DBRecordset==NULL) return 0;
		return m_DBRecordset->GetRecordCount();
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return 0;
}

//获取大小
long __cdecl CDataBase::GetActualSize(LPCTSTR pszParamName)
{
	ASSERT(pszParamName!=NULL);
	try 
	{
		return m_DBRecordset->Fields->Item[pszParamName]->ActualSize;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return -1;
}

//绑定对象
bool __cdecl CDataBase::BindToRecordset(CADORecordBinding * pBind)
{
	ASSERT(pBind!=NULL);
	try 
	{
        IADORecordBindingPtr pIBind(m_DBRecordset);
		pIBind->BindToRecordset(pBind);
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, BYTE & bValue)
{
	try
	{
		bValue=0;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		switch(vtFld.vt)
		{
		case VT_BOOL:
			{
				bValue=(vtFld.boolVal!=0)?1:0;
				break;
			}
		case VT_I2:
		case VT_UI1:
			{
				bValue=(vtFld.iVal>0)?1:0;
				break;
			}
		case VT_NULL:
		case VT_EMPTY:
			{
				bValue=0;
				break;
			}
		default: bValue=(BYTE)vtFld.iVal;
		}	
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, UINT & ulValue)
{
	try
	{
		ulValue=0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if ((vtFld.vt!=VT_NULL)&&(vtFld.vt!=VT_EMPTY)) ulValue=vtFld.lVal;
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, DOUBLE & dbValue)
{	
	try
	{
		dbValue=0.0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		switch(vtFld.vt)
		{
		case VT_R4:
			{
				dbValue=vtFld.fltVal;
				break;
			}
		case VT_R8:
			{
				dbValue=vtFld.dblVal;
				break;
			}
		case VT_DECIMAL:
			{
				dbValue=vtFld.decVal.Lo32;
				dbValue*=(vtFld.decVal.sign==128)?-1:1;
				dbValue/=pow((float)10,vtFld.decVal.scale); 
				break;
			}
		case VT_UI1:
			{
				dbValue=vtFld.iVal;
				break;
			}
		case VT_I2:
		case VT_I4:
			{
				dbValue=vtFld.lVal;
				break;
			}
		case VT_NULL:
		case VT_EMPTY:
			{
				dbValue=0.0L;
				break;
			}
		default: dbValue=vtFld.dblVal;
		}
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, LONG & lValue)
{
	try
	{
		lValue=0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if ((vtFld.vt!=VT_NULL)&&(vtFld.vt!=VT_EMPTY)) lValue=vtFld.lVal;
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, DWORD & ulValue)
{
	try
	{
		ulValue=0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if ((vtFld.vt!=VT_NULL)&&(vtFld.vt!=VT_EMPTY)) ulValue=vtFld.ulVal;
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, INT & nValue)
{
	try
	{
		nValue=0;
		_variant_t vtFld = m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		switch(vtFld.vt)
		{
		case VT_BOOL:
			{
				nValue = vtFld.boolVal;
				break;
			}
		case VT_I2:
		case VT_UI1:
			{
				nValue = vtFld.iVal;
				break;
			}
		case VT_NULL:
		case VT_EMPTY:
			{
				nValue = 0;
				break;
			}
		default: nValue = vtFld.iVal;
		}	
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, __int64 & llValue)
{
	try
	{
		llValue=0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if ((vtFld.vt!=VT_NULL)&&(vtFld.vt!=VT_EMPTY)) llValue=vtFld.llVal;
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, TCHAR szBuffer[], UINT uSize)
{
	try
	{
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if (vtFld.vt==VT_BSTR)
		{
			lstrcpy(szBuffer,(char*)_bstr_t(vtFld));
			return true;
		}
		return false;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, WORD & wValue)
{
	try
	{
		wValue=0L;
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		if ((vtFld.vt!=VT_NULL)&&(vtFld.vt!=VT_EMPTY)) wValue=(WORD)vtFld.ulVal;
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, COleDateTime & Time)
{
	try
	{
		_variant_t vtFld = m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		switch(vtFld.vt) 
		{
		case VT_DATE:
			{
				COleDateTime TempTime(vtFld);
				Time=TempTime;
				break;
			}
		case VT_EMPTY:
		case VT_NULL:
			{
				Time.SetStatus(COleDateTime::null);
				break;
			}
		default: return false;
		}
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取参数
bool __cdecl CDataBase::GetFieldValue(LPCTSTR lpFieldName, bool & bValue)
{
	try
	{
		_variant_t vtFld=m_DBRecordset->Fields->GetItem(lpFieldName)->Value;
		switch(vtFld.vt) 
		{
		case VT_BOOL:
			{
				bValue=(vtFld.boolVal==0)?false:true;
				break;
			}
		case VT_EMPTY:
		case VT_NULL:
			{
				bValue = false;
				break;
			}
		default:return false;
		}
		return true;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return false;
}

//获取返回数值
long __cdecl CDataBase::GetReturnValue()
{
	try 
	{
        _ParameterPtr Parameter;
		long lParameterCount=m_DBCommand->Parameters->Count;
		for (long i=0;i<lParameterCount;i++)
		{
			Parameter=m_DBCommand->Parameters->Item[i];
			if (Parameter->Direction==adParamReturnValue) return Parameter->Value.lVal;
		}
		ASSERT(FALSE);
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return 0;
}

//删除参数
void __cdecl CDataBase::ClearAllParameters()
{
	try 
	{
		long lParameterCount=m_DBCommand->Parameters->Count;
		if (lParameterCount>0L)
		{
			for (long i=lParameterCount;i>0;i--)
			{
				m_DBCommand->Parameters->Delete(i-1);
			}
		}
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//设置存储过程
void __cdecl CDataBase::SetSPName(LPCTSTR pszSpName)
{
	ASSERT(pszSpName!=NULL);
	try 
	{ 
		m_DBCommand->CommandText=pszSpName; 
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//获得参数
void __cdecl CDataBase::GetParameterValue(LPCTSTR pszParamName, _variant_t & vtValue)
{
	//效验参数
	ASSERT(pszParamName!=NULL);

	//获取参数
	try 
	{
		vtValue.Clear();
		vtValue=m_DBCommand->Parameters->Item[pszParamName]->Value;
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//插入参数
void __cdecl CDataBase::AddParamter(LPCTSTR pszName, ADOCG::ParameterDirectionEnum Direction, ADOCG::DataTypeEnum Type, long lSize, _variant_t & vtValue)
{
	ASSERT(pszName!=NULL);
	try 
	{
        _ParameterPtr Parameter=m_DBCommand->CreateParameter(pszName,Type,Direction,lSize,vtValue);
		m_DBCommand->Parameters->Append(Parameter);
	}
	catch (CComError & ComError) { SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError)); }

	return;
}

//执行语句
bool __cdecl CDataBase::Execute(LPCTSTR pszCommand)
{
	ASSERT(pszCommand!=NULL);
	try
	{
		m_DBConnection->CursorLocation=adUseClient;
		m_DBConnection->Execute(pszCommand,NULL,adExecuteNoRecords);
		return true;
	}
	catch (CComError & ComError) 
	{ 
		if (IsConnectError()==true)	TryConnectAgain(false,&ComError);
		else SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError));
	}

	return false;
}

//执行命令
bool __cdecl CDataBase::ExecuteCommand(bool bRecordset)
{
	try 
	{
		//关闭记录集
		CloseRecordset();

		//执行命令
		if (bRecordset==true)
		{
			m_DBRecordset->PutRefSource(m_DBCommand);
			m_DBRecordset->CursorLocation=adUseClient;
			EfficacyResult(m_DBRecordset->Open((IDispatch *)m_DBCommand,vtMissing,adOpenForwardOnly,adLockReadOnly,adOptionUnspecified));
		}
		else 
		{
			m_DBConnection->CursorLocation=adUseClient;
			EfficacyResult(m_DBCommand->Execute(NULL,NULL,adExecuteNoRecords));
		}
		return true;
	}
	catch (CComError & ComError) 
	{ 
		if (IsConnectError()==true)	TryConnectAgain(false,&ComError);
		else SetErrorInfo(ErrorType_Other,GetComErrorDescribe(ComError));
	}

	return false;
}

//获取错误
LPCTSTR CDataBase::GetComErrorDescribe(CComError & ComError)
{
	_bstr_t bstrDescribe(ComError.Description());
	m_strErrorDescribe.Format(TEXT("ADO 错误：0x%8x，%s"),ComError.Error(),(LPCTSTR)bstrDescribe);
	return m_strErrorDescribe;
}

//设置错误
void CDataBase::SetErrorInfo(enADOErrorType enErrorType, LPCTSTR pszDescribe)
{
	m_ADOError.SetErrorInfo(enErrorType,pszDescribe);
	return;
}

//////////////////////////////////////////////////////////////////////////

//构造函数
CDataBaseEngine::CDataBaseEngine(void)
{
	//设置变量
	m_bService=false;
	m_pIDataBaseSink=NULL;

	return;
}

//析构函数
CDataBaseEngine::~CDataBaseEngine(void)
{
}

//接口查询
void * __cdecl CDataBaseEngine::QueryInterface(const IID & Guid, DWORD dwQueryVer)
{
	QUERYINTERFACE(IDataBaseEngine,Guid,dwQueryVer);
	QUERYINTERFACE(IQueueServiceSink,Guid,dwQueryVer);
	QUERYINTERFACE_IUNKNOWNEX(IDataBaseEngine,Guid,dwQueryVer);
	return NULL;
}

//注册接口
bool __cdecl CDataBaseEngine::SetDataBaseSink(IUnknownEx * pIUnknownEx)
{
	//效验参数
	ASSERT(pIUnknownEx!=NULL);
	ASSERT(m_pIDataBaseSink==NULL);
	if (pIUnknownEx==NULL) return false;
	if (m_pIDataBaseSink!=NULL) return false;

	//查询接口
	m_pIDataBaseSink=QUERY_OBJECT_PTR_INTERFACE(pIUnknownEx,IDataBaseSink);
	if (m_pIDataBaseSink==NULL)
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎外挂服务接口获取失败，挂接操作失败"),Level_Exception);
		return false;
	}

	return true;
}

//获取接口
void * __cdecl CDataBaseEngine::GetQueueService(const IID & Guid, DWORD dwQueryVer)
{
	return m_RequestQueueService.QueryInterface(Guid,dwQueryVer);
}

//启动服务
bool __cdecl CDataBaseEngine::StartService()
{
	//判断状态
	if (m_bService==true) 
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎重复启动，启动操作忽略"),Level_Warning);
		return true;
	}

	//外挂接口
	if (m_pIDataBaseSink==NULL)
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎外挂服务不存在"),Level_Exception);
		return false;
	}

	//设置队列
	if (m_RequestQueueService.SetQueueServiceSink(QUERY_ME_INTERFACE(IUnknownEx))==false)
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎与队列服务绑定失败"),Level_Exception);
		return false;
	}

	//启动外挂
	if (m_pIDataBaseSink->StartService(QUERY_ME_INTERFACE(IUnknownEx))==false)
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎外挂服务启动失败"),Level_Exception);
		return false;
	}

	//启动队列
	if (m_RequestQueueService.StartService()==false)
	{
		CEventTrace::ShowEventNotify(TEXT("数据库引擎队列服务启动失败"),Level_Exception);
		return false;
	}

	//设置变量
	m_bService=true;

	return true;
}

//停止服务
bool __cdecl CDataBaseEngine::StopService()
{
	//设置变量
	m_bService=false;

	//停止请求队列
	m_RequestQueueService.StopService();

	//停止外挂
	if (m_pIDataBaseSink!=NULL)
	{
		m_pIDataBaseSink->StopService(QUERY_ME_INTERFACE(IUnknownEx));
	}

	return true;
}

//队列接口
void __cdecl CDataBaseEngine::OnQueueServiceSink(WORD wIdentifier, void * pBuffer, WORD wDataSize)
{
	//判断状态
	if (m_bService==false) return;

	//请求处理
	switch (wIdentifier)
	{
	case EVENT_DATABASE:
		{
			//效验参数
			ASSERT(pBuffer!=NULL);
			ASSERT(wDataSize>=sizeof(NTY_DataBaseEvent));
			if (wDataSize<sizeof(NTY_DataBaseEvent)) return;

			//变量定义
			NTY_DataBaseEvent * pDataBaseEvent=(NTY_DataBaseEvent *)pBuffer;
			WORD wHandleBuffer=wDataSize-sizeof(NTY_DataBaseEvent);

			//处理数据
			ASSERT(m_pIDataBaseSink!=NULL);
			m_pIDataBaseSink->OnDataBaseRequest(*pDataBaseEvent,pDataBaseEvent+1,wHandleBuffer);

			return;
		}
	}

	return;
}

//////////////////////////////////////////////////////////////////////////

//建立对象函数
extern "C" __declspec(dllexport) void * __cdecl CreateDataBaseEngine(const GUID & Guid, DWORD dwInterfaceVer)
{
	//建立对象
	CDataBaseEngine * pDataBaseEngine=NULL;
	try
	{
		pDataBaseEngine=new CDataBaseEngine();
		if (pDataBaseEngine==NULL) throw TEXT("创建失败");
		void * pObject=pDataBaseEngine->QueryInterface(Guid,dwInterfaceVer);
		if (pObject==NULL) throw TEXT("接口查询失败");
		return pObject;
	}
	catch (...) {}

	//清理对象
	SafeDelete(pDataBaseEngine);
	return NULL;
}

//////////////////////////////////////////////////////////////////////////

//建立对象函数
extern "C" __declspec(dllexport) void * __cdecl CreateDataBase(const GUID & Guid, DWORD dwInterfaceVer)
{
	//建立对象
	CDataBase * pDataBase=NULL;
	try
	{
		pDataBase=new CDataBase();
		if (pDataBase==NULL) throw TEXT("创建失败");
		void * pObject=pDataBase->QueryInterface(Guid,dwInterfaceVer);
		if (pObject==NULL) throw TEXT("接口查询失败");
		return pObject;
	}
	catch (...) {}

	//清理对象
	SafeDelete(pDataBase);
	return NULL;
}

//////////////////////////////////////////////////////////////////////////