开始我的第一个vc模块的设计。
这个是一个vc的写日志的类，为什么叫CLog3...因为之前有两版写log的类，但是都是用C#写的，所以这个vc写的就叫CLog3吧。
功能只是简单模拟C#中的写Log的方法的设计。
设计思路：
因为在程序运行过程中， 需要记录一些信息到log中， 同时要尽量减少对主处理模块的影响，减少i|o的操作，所以CLog3中设计的思路为自己创建一个Thread，该Thread会获取一个队列中的讯息，当要写一个讯息的时候， 将要写的信息添加到队列中，并通知Thread获取队列中的资料，写入已经打开的文件中。
因为在StartLog的时候，就已经将一个CFile对象打开了，所以减少了写是在Open的操作。
而调用方只是将要写的log扔到队列中，然后就可以继续处理自己的事情了，不用等待log写完后在处理，减少了对主模块的影响。
该开发环境是windows 2003 + vc.net 2005, 因为vc.net 2005中默认开启了Unicode 的模式，所以要写汉字到文件需要将CString转换成char * ,祥见： http://www.cnblogs.com/zhucl1006/archive/2008/01/02/1023380.html
Clog3.h
/* 一个写log的类
时间 :2008-1-2版本 :1.0.0.0作者 :Karl.zhu
*/
#pragma once#include <afxmt.h>// CLog3 命令目标class CLog3{public: CLog3(); void Init(CString FilePath,CString FileName); virtual ~CLog3();public : CString m_FilePath; CString m_FileName; DWORD m_Fileday; CFile m_File; HANDLE m_processStopHandle,m_processSignalHandle,m_processThreadHandle; CStringList m_messageQueue; CMutex m_mutex; static void LogProcessorThread(LPVOID data); void QueueMessage(CString szLogEntry); void StartLog(); void StopLog(); void CrateLog(CString csFilePath,CString csFileName);};CLog3.cpp
// ///* 一个写log的类时间 :2008-1-2版本 :1.0.0.0作者 :Karl.zhu*/#include "stdafx.h"#include "Log3Demo.h"#include "Log3.h"#include <process.h>// CLog3CLog3::CLog3(){ }void CLog3::Init(CString FilePath,CString FileName){ m_FilePath = FilePath; m_FileName = FileName;}CLog3::~CLog3(){}// CLog3 成员函数void CLog3::CrateLog(CString csFilePath,CString csFileName){ try
{
this->m_mutex.Lock(); CFileFind find ; if (!find.FindFile(csFilePath)) { CreateDirectory(csFilePath,NULL);
} CString filename,fileexe; int Where = csFileName.ReverseFind(_T('.')); if (Where != -1) { filename = csFileName.Left(Where); fileexe = csFileName.Right(csFileName.GetLength() - Where - 1); } else { filename = csFileName; fileexe = ""; } CTime now_time ; SYSTEMTIME tm; GetLocalTime(&tm); CString day; day.Format(_T("_%02d"),tm.wDay); CString FileFullPath; FileFullPath.Format(_T("%s\\%s%s.%s"),csFilePath,filename,day,fileexe); if (m_File.m_hFile != CFile::hFileNull) { m_File.Close(); } if (!find.FindFile(FileFullPath,NULL)) { //没有找到 if (!m_File.Open(FileFullPath,CFile::modeCreate|CFile::modeReadWrite| CFile::shareDenyNone)) { AfxMessageBox(_T("Open File Error")); } this->m_Fileday = tm.wDay; } else { //找到 WIN32_FIND_DATA FindFileData; FindClose(FindFirstFile(FileFullPath,&FindFileData)); SYSTEMTIME csCreateTime; FileTimeToSystemTime(&FindFileData.ftCreationTime,&csCreateTime); if (tm.wDay == csCreateTime.wDay && tm.wMonth == csCreateTime.wMonth && tm.wYear == csCreateTime.wYear) { if(!m_File.Open(FileFullPath,CFile::modeReadWrite| CFile::shareDenyNone)) { AfxMessageBox(_T("Open Log Error")); } this->m_Fileday = tm.wDay; } else { if (!m_File.Open(FileFullPath,CFile::modeCreate | CFile::modeReadWrite | CFile::shareDenyNone)) { AfxMessageBox(_T("Open Log Error")); } else{ FILETIME ft; SystemTimeToFileTime(&tm,&ft); SetFileTime(m_File.m_hFile,&ft,&ft,&ft); this->m_Fileday = tm.wDay; } } //memset(&FileInfo,0,sizeof(FILE_INFO)); } } catch (
) { DWORD lastError = GetLastError(); CString Err ; Err.Format(_T("%d"),lastError); AfxMessageBox(Err); } this->m_mutex.Unlock();}void CLog3::StartLog(){ CrateLog(m_FilePath,m_FileName); this->m_processStopHandle = CreateEvent(NULL,TRUE,FALSE,NULL); this->m_processSignalHandle = CreateEvent(NULL,TRUE,FALSE,NULL); m_processThreadHandle = HANDLE(_beginthread(LogProcessorThread, 0, this)); if(m_processThreadHandle != LPVOID(-1)) { AfxMessageBox(_T("Log Thread OK")); } else { AfxMessageBox(_T("Log Thread Faild")); } }void CLog3::StopLog(){ SetEvent(this->m_processStopHandle);}void CLog3::LogProcessorThread(LPVOID data){ CLog3 *me = (CLog3 *) data; BOOL bStop = FALSE; DWORD dwWritten; HANDLE hHandleArray[2]; ASSERT(me); hHandleArray[0] = me->m_processStopHandle; hHandleArray[1] = me->m_processSignalHandle; CString csData; while (bStop == FALSE) { switch (WaitForMultipleObjects(2, hHandleArray, FALSE, INFINITE)) { case WAIT_OBJECT_0: bStop = TRUE; break; case WAIT_OBJECT_0 + 1: // Lock the queue to get the count and the next entry SYSTEMTIME tm1; GetLocalTime(&tm1); if (me->m_Fileday != tm1.wDay) { me->CrateLog(me->m_FilePath,me->m_FileName); } me->m_mutex.Lock(); while (me->m_messageQueue.GetCount()) { csData = me->m_messageQueue.RemoveTail(); SYSTEMTIME tm; GetLocalTime(&tm); CString csFullData; csFullData.Format(_T("%02d:%02d:%02d[%03d] %s"),tm.wHour,tm.wMinute,tm.wSecond,tm.wMilliseconds,csData); // Now unlock the queue while we write me->m_mutex.Unlock(); // Seek to the end of the file me->m_File.SeekToEnd(); DWORD leg = WideCharToMultiByte(CP_OEMCP,NULL,csFullData,-1,NULL,0,NULL,FALSE); CHAR strchar [5000]; WideCharToMultiByte(CP_OEMCP,NULL,csFullData,-1,strchar,leg,NULL,FALSE); me->m_File.Write(strchar,strlen(strchar)); CHAR * endline ="\r\n"; me->m_File.Write(endline,strlen(endline)); me->m_mutex.Lock(); } // Now unlock it again me->m_mutex.Unlock(); // Force output to disk me->m_File.Flush(); ResetEvent(me->m_processSignalHandle); break; } } me->m_File.Close();AfxMessageBox(_T("end File"));_endthread();}void CLog3::QueueMessage(CString szLogEntry){ AFX_MANAGE_STATE(AfxGetStaticModuleState()); ASSERT(szLogEntry); ASSERT(AfxIsValidString(szLogEntry)); // Lock the object for the addhead call // (must be fast once we get the lock). m_mutex.Lock(); m_messageQueue.AddHead(szLogEntry); m_mutex.Unlock(); // Now tell our processing thread there's // new stuff to write SetEvent(m_processSignalHandle);}
这个算是我第一个vc的code，可能也存在什么不妥之处，读者们见笑了。