watchservice

Capture events happening inside a directory

由 余生长醉 提交于 2020-01-30 02:58:53
问题 Im watching a directory using Java 7 nio WatchService by using below method. Path myDir = Paths.get("/rootDir"); try { WatchService watcher = myDir.getFileSystem().newWatchService(); myDir.register(watcher, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE, StandardWatchEventKinds.ENTRY_MODIFY); WatchKey watckKey = watcher.take(); List<WatchEvent<?>> events = watckKey.pollEvents(); for (WatchEvent event : events) { if (event.kind() == StandardWatchEventKinds.ENTRY

Implementing renaming and deletion in java watchservice

由 别等时光非礼了梦想. 提交于 2020-01-24 05:44:08
问题 I tried to implement simple renaming in java WatchService. My assumption is: when files are renamed, three operations are performed Deletion of file xxx creation of file yyy modification of file yyy Below are my codes: MyWatcher.java import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; import java.nio.file.Paths; import java.nio.file.StandardWatchEventKinds; import java.nio.file.WatchEvent; import java.nio.file.WatchKey; import java.nio.file.WatchService;

Monitor remote shared-Folder (Windows/SMB) using WatchService

由 不羁岁月 提交于 2020-01-04 03:00:47
问题 I am trying to monitor a remote folder using WatchService (java.nio.file.*). Everything works fine for local folders. However I was unable to figure out how to monitor a remote share. Can I pass credentials along? (If the user executing the code has the rights to mount the share it works as well.) Here are parts of my code: public void lunch() throws IOException { boolean recursive = true; Path dir = Paths.get("C:\\test"); new Watch(dir, recursive).processEvents(); } public Watch(Path dir,

Monitor remote shared-Folder (Windows/SMB) using WatchService

由 ＊爱你＆永不变心＊ 提交于 2020-01-04 03:00:09
问题 I am trying to monitor a remote folder using WatchService (java.nio.file.*). Everything works fine for local folders. However I was unable to figure out how to monitor a remote share. Can I pass credentials along? (If the user executing the code has the rights to mount the share it works as well.) Here are parts of my code: public void lunch() throws IOException { boolean recursive = true; Path dir = Paths.get("C:\\test"); new Watch(dir, recursive).processEvents(); } public Watch(Path dir,

How to watch file for new content and retrieve that content

由 ℡╲_俬逩灬. 提交于 2019-12-22 14:17:41
问题 I have a file with name foo.txt . This file contains some text. I want to achieve following functionality: I launch program write something to the file (for example add one row: new string in foo.txt ) I want to get ONLY NEW content of this file. Can you clarify the best solution of this problem? Also I want resolve related issues: in case if I modify foo.txt I want to see diff. The closest tool which I found in Java is WatchService but if I understood right this tool can only detect type of

Releasing resources of Java 7 WatchService

由 吃可爱长大的小学妹 提交于 2019-12-22 06:56:45
问题 I am using Java 7 WatchService to watch directories. I constantly change which directories i am watching. I run into the exception: java.io.IOException: The network BIOS command limit has been reached. after 50 directories. I am certain i call close() on each WatchService i create before creating a new one. Does anyone know the proper way to release a WatchService so you do not run into this limit? Thanks, Dave 回答1: I think that all you need to do is close() the service. I know you said that

How can I watch subdirectory for changes with WatchService? (Java)

由 无人久伴 提交于 2019-12-18 13:24:27
问题 I want to watch some directory for changes and her subdirectories. I tried to do this with WatchService but I can't know from which directory the file was changed. How can I retrieve the full path from the WatchEvent? 回答1: Generally you provide the directory name of the file when starting the watchservice. Here is a tutorial demonstrating how that works: http://blogs.oracle.com/thejavatutorials/entry/watching_a_directory_for_changes From the tutorial: Path dir = ...; try { WatchKey key = dir

How to watch a folder and subfolders for changes

由 纵然是瞬间 提交于 2019-12-18 11:27:17
问题 I´m trying to watch a specific folder for changes, and then if any addition/edition/removal happens inside of it, I need to get the change type of all files in that folder and its subfolders. I'm using WatchService for this but it only watches a single path, it doesn't handle subfolders. Here's my approach: try { WatchService watchService = pathToWatch.getFileSystem().newWatchService(); pathToWatch.register(watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY

java 1.7watchservice特性学习 文件变更监控

由 Deadly 提交于 2019-12-17 16:17:39
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、首先概述1.7版本上面的这个java.nio.file.WatchService类 1.1 WatchService 可以干什么？ WatchService可以帮助我们监控一些文件是否做了更改，如果文件做了更改，可以帮助我们去做一些响应，比如，配置文件修改了，那么系统应该重新加载一下配置文件，这样可以将最新的配置加载进来。 1.2 完成文件监控一些很重要的类 The watch service exits when either the thread exits or when it is closed (by invoking its closed method。当前启动的线程退出或者调用closed方法关闭的时候，watch service也会推出。 1.2.1 java.nio.file.WatchKey类 此类代表着一个Object(文件或者文件夹) 注册到WatchService后，返回一个WatchKey类。反应当前所注册的Object状态的类。此类封装了不同事件的状态值，比如，当文件(文件夹)被修改或者被删除或者创建的时候，此类首先产生一个信号量,等待消费者来取并且该WatchKey将会进入到WatchService的队列中。如果WatchKey已经进入到队列当中，但是又有了变化

Java WatchService on Windows informing of folder creation before contents have been copied

由 拟墨画扇 提交于 2019-12-12 22:36:56
问题 I'm trying to use Java 7 and WatchService to monitor when folders are added to a folder (by being copied from a different location), then I want to act on the files within the newly created folder. On OSX it works as I expect, I don't receive notification of new folder creation until the folder and its contents have been copied over. But on Windows I receive the key event on the folder creation before the contents of the folder have been copied so when I try to process the files within the
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