Chris, thanks for responding. The servlet I have in mind for modification is the one responsible for performing the search as well as for getting the next page of search results. If one or more of the wikis is unavailable, I want to display an error message on the search results page.
The wiki availability check won't be done all the time, as I mentioned before, just every so often, say, every 30 minutes. Why would using a ServletContextListener be better than using a servlet? On Fri, May 18, 2012 at 12:20 PM, Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Vance, > > On 5/18/12 12:14 PM, Vance - wrote: > > I'm maintaining a Web application for searching multiple wikis, > > this app runs under Tomcat 6. I need to modify a servlet so it > > instantiates a 'Thread' subclass to perform a wiki availability > > check every so often, say every 30 minutes. > > Suggestion: use a ServletContextListener, not a Servlet. Remember to > terminate the thread in the destroy() method. Note that terminating a > thread basically requires that you be able to communicate with the > thread to tell it to shut down (i.e. don't call Thread.stop()): you > need to have a Runnable that can be interrupted (using interrupt()) > and also knows that the interrupt needs to be terminal... so set a > "shutdown" flag or something like that. > > > Given that I'm no expert on the use of threads, a co-worker > > suggested the following questions to look into: > > > > · Does the spawned thread have a time limit imposed by > > Tomcat? > > No. > > > · Does it take up worker thread space from other Tomcat > > threads? > > No. > > Your thread will take up RAM and CPU time of course. Also, processes > have thread limits and your thread will count against that. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG/MacGPG2 v2.0.17 (Darwin) > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAk+2dsYACgkQ9CaO5/Lv0PBT8ACgnUwG5KjDzTf9SYHtEM9iaYxJ > dy8An1vGhmAjMhzgpvfXGVNMkDlQTPzA > =nH91 > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
