JAVA NIO Watcher：如何检测持久（复制）操作的结束？ [英] JAVA NIO Watcher: How to detect end of a long lasting (copy) operation?

问题描述

我需要在dir中对新引入的文件进行一些ZIP动作。我在那里获得了CREATE事件，它被触发了。复制到该目录的操作需要一些时间。

I need to make some ZIP- action on a freshly introduced file in a dir. There I subsribe for the CREATE event, which is fired. The copy operation into that directory takes some time.

所以我在访问文件时得到ACCESS_DENIED，被另一个进程锁定。

So I get ACCESS_DENIED, "locked by another process" when accessing the file.

NIO是否提供类似LOCK Released的内容，或者我是否需要以某种方式轮询文件以释放锁？如下所述：http：//stackoverflow.com/questions/750471/how-to-know-whether-a-file-copying-is-in-progress-complete-in-java-1-6

Does NIO provide something like "LOCK Released" or do I need to poll the file somehow for the lock to be released ? Like described here :http://stackoverflow.com/questions/750471/how-to-know-whether-a-file-copying-is-in-progress-complete-in-java-1-6

感谢您的帮助。

Gerd

推荐答案

将文件复制到不同的目录中;完成后，将其移至监视目录。

copy the file in a different directory; after it's done, move it to the watched directory.

java.nio.file.Files.move(srcFile, targetFile, StandardCopyOption.ATOMIC_MOVE);

观察者将看到一个CREATE事件

the watcher will see one CREATE event

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