JESS: changing facts in a fact file

2009-03-11 Thread Tanja Vicovac
Hi, I have to create a KBS with a fact-file, which is extended every 10 minutes. I think it's possible to check in a certain intervall if the facts-file is changing or not (like polling), but is there another possibility? How does JESS recognize when facts in a fact-file are changing

Re: JESS: changing facts in a fact file

2009-03-11 Thread Peter Lin
JESS simply loads the file and forgets about it. If you want to monitor a file, you'll have to do that yourself and then call clear and batch. If you don't want to reload the entire file, you'll have to maintain state and keep track of the last line and then only assert the new facts. why not

Re: JESS: changing facts in a fact file

2009-03-11 Thread Wolfgang Laun
On Wed, Mar 11, 2009 at 3:30 PM, Tanja Vicovac tanja.vico...@tuwien.ac.atwrote: Hi, I have to create a KBS with a fact-file, which is extended every 10 minutes. I think it's possible to check in a certain intervall if the facts-file is changing or not (like polling), but is there another

Re: JESS: changing facts in a fact file

2009-03-11 Thread Jason Morris
Hi Tanja, There is also an API called JNotify that allows one to receive file system events on Windows and LINUX. See: http://nixbit.com/cat/programming/libraries/jnotify/ http://sourceforge.net/projects/jnotify/ See if this is what you need. You can also have a thread periodically monitor your

Re: JESS: changing facts in a fact file

2009-03-11 Thread Peter Lin
Instead of modifying the existing file, why not create a new file? that way you can just load each new file at the set interval? the other approach I've used in the past is to sent facts to JESS using JMS messaging peter On Wed, Mar 11, 2009 at 1:00 PM, Jason Morris jason.c.mor...@gmail.com