162 lines
4 KiB
C++
162 lines
4 KiB
C++
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//
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// MODULE: FileTracker.cpp
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//
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// PURPOSE: Abstract classes in support of tracking file changes over time.
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// Completely implements CFileToTrack, CFileTracker
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//
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// COMPANY: Saltmine Creative, Inc. (206)-284-7511 support@saltmine.com
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//
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// AUTHOR: Joe Mabel
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//
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// ORIGINAL DATE: 9-15-98
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//
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// NOTES:
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//
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// Version Date By Comments
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//--------------------------------------------------------------------
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// V3.0 09-15-98 JM
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//
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#include "stdafx.h"
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#include "event.h"
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#include "FileTracker.h"
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#include "Functions.h"
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#include "baseexception.h"
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#include "CharConv.h"
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//////////////////////////////////////////////////////////////////////
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// CFileToTrack
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//////////////////////////////////////////////////////////////////////
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CFileToTrack::CFileToTrack(const CString & strPathName) :
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m_strPathName(strPathName),
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m_bFileExists(false)
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{
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m_ftLastWriteTime.dwLowDateTime = 0;
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m_ftLastWriteTime.dwHighDateTime = 0;
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}
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CFileToTrack::~CFileToTrack()
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{
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}
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void CFileToTrack::CheckFile(bool & bFileExists, bool & bTimeChanged, const bool bLogIfMissing )
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{
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HANDLE hSearch;
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WIN32_FIND_DATA FindData;
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hSearch = ::FindFirstFile(m_strPathName, &FindData);
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bFileExists = (hSearch != INVALID_HANDLE_VALUE);
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// initialize bTimeChanged: we always consider coming into existence as a time change.
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bTimeChanged = bFileExists && ! m_bFileExists;
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m_bFileExists = bFileExists;
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if (bFileExists)
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{
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::FindClose(hSearch);
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// for some reason, we can't compile
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// bTimeChanged |= (m_ftLastWriteTime != FindData.ftLastWriteTime);
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// so:
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bTimeChanged |= (0 != memcmp(&m_ftLastWriteTime, &(FindData.ftLastWriteTime), sizeof(m_ftLastWriteTime)));
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m_ftLastWriteTime = FindData.ftLastWriteTime;
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}
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else
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{
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// file disappeared or never existed, ignore for now
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m_bFileExists = false;
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bFileExists = false;
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if (bLogIfMissing)
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{
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CString strErr;
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FormatLastError(&strErr, ::GetLastError());
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CBuildSrcFileLinenoStr SrcLoc( __FILE__, __LINE__ );
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CEvent::ReportWFEvent( SrcLoc.GetSrcFileLineStr(),
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SrcLoc.GetSrcFileLineStr(),
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m_strPathName,
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strErr,
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EV_GTS_ERROR_FILE_MISSING );
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}
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bTimeChanged = false;
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}
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}
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//////////////////////////////////////////////////////////////////////
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// CFileTracker
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//////////////////////////////////////////////////////////////////////
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CFileTracker::CFileTracker()
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{
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}
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CFileTracker::~CFileTracker()
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{
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}
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void CFileTracker::AddFile(const CString & strPathName)
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{
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try
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{
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m_arrFile.push_back(CFileToTrack(strPathName));
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}
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catch (exception& x)
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{
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CString str;
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// Note STL exception in event log.
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CBuildSrcFileLinenoStr SrcLoc( __FILE__, __LINE__ );
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CEvent::ReportWFEvent( SrcLoc.GetSrcFileLineStr(),
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SrcLoc.GetSrcFileLineStr(),
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CCharConversion::ConvertACharToString(x.what(), str),
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_T(""),
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EV_GTS_STL_EXCEPTION );
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}
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}
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bool CFileTracker::Changed( const bool bLogIfMissing )
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{
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bool bChange = false;
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bool bSomethingMissing = false;
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//
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// This try-catch block was added as a measure to handle an unexplainable problem.
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//
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// Previously this function was throwning a (...) exception in release builds but
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// not in debug builds. Adding this try-catch block had the effect of making the
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// (...) exception in release builds disappear. This problem was causing the
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// directory monitor thread to die so if you change this function, please verify
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// that the directory monitor thread is still viable.
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// RAB-981112.
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try
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{
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for(vector<CFileToTrack>::iterator it = m_arrFile.begin();
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it != m_arrFile.end();
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it ++
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)
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{
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bool bFileExists;
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bool bTimeChanged;
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it->CheckFile(bFileExists, bTimeChanged, bLogIfMissing );
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bChange |= bTimeChanged;
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bSomethingMissing |= !bFileExists;
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}
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}
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catch (...)
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{
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// Catch any other exception thrown.
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CBuildSrcFileLinenoStr SrcLoc( __FILE__, __LINE__ );
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CEvent::ReportWFEvent( SrcLoc.GetSrcFileLineStr(),
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SrcLoc.GetSrcFileLineStr(),
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_T(""), _T(""),
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EV_GTS_GEN_EXCEPTION );
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}
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return (bChange && !bSomethingMissing);
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}
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