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Java Forum / General / May 2007How can I hook the filesystem?
Like tomcat,when I put a war into the webapps directory,it starts to unzip it. How did it do that?? > 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 > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 5 lines] > Cheers, > Bo Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 5 lines] > Cheers, > Bo Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 5 lines] > Cheers, > Bo Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 5 lines] > Cheers, > Bo Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 5 lines] > Cheers, > Bo Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? Wow,thx for your knowledge!So the tomcat is! Just a timertask....I thought it may cost too much,but it is a simple nice solution. Like many other situations which need "interruption mechanism" but do not have it,en,just build a new thread to handle these... What else needs paying attention to if I do this? > 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 > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 12 lines] > > /philipp well,I thought tomcat used jni,but it does not, :) Yeah,linux , win or solaris all have some function to hook the file system. > > Like tomcat,when I put a war into the webapps directory,it starts to > > unzip it. [quoted text clipped - 12 lines] > > /philipp well,I thought tomcat used jni,but it does not, :) Yeah,linux , win or solaris all have some function to hook the file system. >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 -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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