• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Watch a Folder

 
Greenhorn
Posts: 29
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi

Is there some core java class that watches a folder so that when a file inserted into that folder something fires some event?

Thanks
 
Marshal
Posts: 79234
377
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Don't think so, no.

That is not the way applications usually work; you work from the application towards the OS/file system.

Try a Timer and a TimerTask which interrogates the folder regularly and records whether there is any change to the number of files in the folder. Go through the java.io.File class for more details.
 
Greenhorn
Posts: 8
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
i think we can do this with a thread which is running continiously iterating through a while loop and checking the folders last modifies time at regular intervals the folder.lastmodified() if there is change in the time we can fire an event . i hope so it works..
 
Bartender
Posts: 1952
7
Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You could use the Apache Commons Virtual File System (VFS) classes to accomplish this if you don't feel like rolling your own.
 
Don't get me started about those stupid light bulbs.
reply
    Bookmark Topic Watch Topic
  • New Topic