How can I hook the filesystem?

[lightning]

Like tomcat,when I put a war into the webapps directory,it starts to
unzip it.
How did it do that??

 

[linbo]

Like tomcat,when I put a war into the webapps directory,it starts to
unzip it.
How did it do that??

I'm not aware of any way to 'hook' into the filesystem, by Tomcat does it by
having a background thread check the webapps directory every few seconds.

Cheers,
Bo

 

[Philipp Leitner]

Like tomcat,when I put a war into the webapps directory,it starts to
unzip it.
How did it do that??

To 'hook' the filesystem you would need a OS kernel extension that
actually /tells/ the application when the FS has changed. There's
something like that for Linux (for instance Beagle uses this kernel
extension) and most probably also for other OS, but that solution
would be highly operation system specific, and you would probably need
JNI to use it at all (guess there's no Java bindings).

If you are just interested in one single directory the much simpler
solution is to have a watcher thread (perhaps a Timer Task) checking
the directory contents periodically.

/philipp

 

[Roedy Green]

Like tomcat,when I put a war into the webapps directory,it starts to
unzip it.
How did it do that??

see http://mindprod.com/jgloss/filemonitor.html