No offense intended, but some of the proposed solutions to this simple query
strike me as falling into the "shooting flies with a battleship" category;
you're making it much more complicated than it needs to be. And those
proposing using Cron or JRunScheduler are then locked into a particular
platform.
Why not write a pure Java solution, and let the built-in Java mechanisms do
your timing for you? The sleep method of the Thread class takes a duration
as the parameter. When your servlet/JSP first starts up, spawn a thread as
Krishnan suggested. Rather than spend overhead waking up periodically to
check for the right time, this thread just does a simple subtraction to
calculate how long between "now" and the next time you want to do your
operations, then calls sleep for that duration. When it wakes up, it does
its work, then calculates how long until the next wakeup time, and sleeps
for that duration. A single sleeping thread really doesn't take up much in
the way of resources, so there's no reason you can't just leave this thread
"running" all the time.
Simple, elegant, platform-independent, very low resource usage.
--Jim Preston
-----Original Message-----
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of Krishnan
Sent: Wednesday, August 02, 2000 5:31 AM
To: [EMAIL PROTECTED]
Subject: How can I schedule a Job in JSP or servlet...
Hi pals,
We have to run a servlet or JSP automatically on saturday night at 12. We
are planning to write a servlet and in the init method of that servlet,
planning to invoke a thread which checks for the specified time and if
satisfies, do the necessary operations. We will load that servlet at startup
of the server. I want to know, is there is any other possible way of
achieving the same.
Your replies are highly appreciated.
rgds
krishnan
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
