Re: Thread question

[Tamas Perlaky <tamas@xxxxxxxxx>]

Hi Ron,

What you're doing sounds reasonable enough, provided you're not doing  
this within an EJB container.  If it's just a plain web app. you  
should be fine.  You might want to check out the java.util.Timer  
class to handle the scheduling and thread management for you; it will  
also make it easy to have your task run at a specific time each day.   
Also, you'll want to make sure that the servlet this is coordinated  
from knows to disable the timer (or interrupt your thread for a  
graceful stop, if you're not using Timer) when your web app is  
removed (i.e. in the servlet's destroy method).

Per Walden's recommendation that you do this task outside of the web  
app... I'd probably do it as a standalone java app. myself (called  
from the job scheduler) but I don't think there's anything  
necessarily wrong with your approach either.  The hybrid approach  
using GetURI is an neat idea and worth considering, but I'm not sure  
you really gain that much for the extra effort.

t.

On 21-Jun-06, at 2:34 PM, RPower@xxxxxxxxxx wrote:

> I have a need for a web application that I'm writing to do a daily  
> check
> for expiry dates, and if any meet criteria, to email people  
> notifying them
> of the expiration coming up.
> I'm currently creating a thread, then making it sleep for 24 hours  
> and run
> again.  Is this efficient to do?  Should I be wary of anything by  
> doing
> this?  Or is there a better way to do it?
>
> Ron Power
> Programmer
> Information Services
> City Of St. John's, NL
> P.O. Box 908
> St. John's, NL
> A1C 5M2
> 709-576-8132
> rpower@xxxxxxxxxx
> http://www.stjohns.ca/
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