* Funtion called when a file is renamed from watch directory Void OnFileRemoved(const std::wstring& sFile) * Funtion called when a file is removed from watch directory
Void OnFileAdded(const std::wstring& sFile) * Funtion called when a file is added to watch directory Void OnFileChange(const std::wstring& fileNmae) * Funtion called when a file is chnaged in watcher directory * Watching a directory passed for file change and notifies if there is a change.ĬFileSystemWatcher(const std::wstring& logDir) Ĭonst std::wstring& GetDir() Virtual void OnFileRenamed(const std::wstring& path) = 0 Virtual void OnFileRemoved(const std::wstring& path) = 0 Virtual void OnFileAdded(const std::wstring& path) = 0 Virtual void OnFileChange(const std::wstring& path) = 0
#JAVA FILEWATCHER WATCH FOR FILE TYPE WINDOWS#
This CFileSystemWatcher is for Windows written in VC++ using win32 API. Languages like java or C# has built in classes for file watching.in Java The package provides a file change notification API, called the Watch Service API.C# has FileSystemWatcher class defined in System.IO.Ĭ++ doesn’t have a ready made class available for File System watching recently I had written a class for it here I am sharing it.
#JAVA FILEWATCHER WATCH FOR FILE TYPE FULL#
Before implementing this, we tried and looked at other options (including inotify and watchdog) in various languages, but realized they all failed to detect reliably changes on remote NFS. In our team, we routinely monitor millions of files for change/deletion/creation, including on remote locations, but this relies on polling (in an optimized, parsimonious way) and caching. This SO answer is an excellent explanation of this. While that works quite well on local filesystems (although with some limitations on the number of files being watched), it often fails on remote mounted ones. It usually boils down to using some kernel capability (e.g.
Many languages implement some "file watcher" monitoring capability. I've also found out that using the 'copy' module of ansible for the process I've described above doesn't help, an just buy using shell cp it fires the filewatcher.Įven if I've solved it I would like to hear if you know why does the file watcher doesn't fire when changes are made using sed In the new script I have copied the wanted file to a tmp file using cp command, then using the 'replace' module on the tmp file and finally copying the tmp file back to the wanted one. Now I've got it working by making a different ansible script, The sed command itself works, the file actually get changed and the modified date is changed also but for some reason the fire watcher doesn'tĪt the beginning I tried an ansible script and I have used the module 'replace' and it didn't word, therefor I tried to change the file locally with sed as mentioned above with no success. The sed command looks something like that: sed -i 's/a/b/g' file.csv watchService = FileSystems.getDefault().newWatchService() But when I replace word in file using sed, the file watcher doesn't recognize the changes. When I edit the file with vim the File Watcher detect the changes. I'm trying to use Java File Watcher to listen for changes in a file.