This is actually part of the EJB spec. And it is implemented ;)
And yes it will retrigger.
Manfred
From: Dru Devore [mailto:ddevore_at_duckhouse.us]
Sent: Thursday, July 24, 2008 2:15 PM
To: users_at_glassfish.dev.java.net
Subject: RE: Keeping a timer alive
Oh my...that was so much easier than I thought. With little work and it just works.
I am reading elsewhere that the timing in EJB 3 is still not implemented which, if I remember correctly, is why I didn't do it this way from the start. But if you use this example:
http://www.diotalevi.com/weblog/2006/10/30/java-ee-in-the-trenches-how-to-use-the-timerservice-and-write-a-timer-session-bean/
Everything for what I need is right there.
One last question though. If something goes horribly wrong with an execution of the task and it dies, runtime exception or something, am I right in saying that it will pickup with the next one? (I am going to be testing it if you don't know for sure)
Thanks for the suggestion.
-------- Original Message --------
Subject: RE: Keeping a timer alive
From: "Manfred Riem" <mriem_at_manorrock.org>
Date: Thu, July 24, 2008 12:48 pm
To: <users_at_glassfish.dev.java.net>
Hi Dru,
While it might seem to be a lot of overhead it is J2EE standard. Spawning a thread
in a servlet is not. The question is if you want to deal with race conditions that are
associated with threading.
Manfred
From: Dru Devore [ <mailto:ddevore_at_duckhouse.us> mailto:ddevore_at_duckhouse.us]
Sent: Thursday, July 24, 2008 10:31 AM
To: <mailto:users_at_glassfish.dev.java.net> users_at_glassfish.dev.java.net
Subject: RE: Keeping a timer alive
I am sure I can make this work though all I really need is a a timer that kicks off a method every X seconds and is managed by someone. Using the servlet I simply had a thread that would sleep for X seconds but I didn't have any management, which could be done if I need to.
Looking at the EJB timer service it looks like a lot of overhead and work to do a run this every X seconds. Is there a solution I am missing or do I need to create a monitor thread for my run every x seconds thread?
-------- Original Message --------
Subject: RE: Keeping a timer alive
From: "Manfred Riem" <mriem_at_manorrock.org>
Date: Thu, July 24, 2008 10:25 am
To: < <mailto:users_at_glassfish.dev.java> users_at_glassfish.dev.java.net>
The following URLs come to mind:
<
http://java-x.blogspot.com/2007/01/ejb-3-timer-service.html>
http://java-x.blogspot.com/2007/01/ejb-3-timer-service.html
<
http://docs.sun.com/app/docs/doc/820-4496/beahw?a=view>
http://docs.sun.com/app/docs/doc/820-4496/beahw?a=view
<
http://www.diotalevi.com/weblog/2006/10/30/java-ee-in-the-trenches-how-to-use-the-timerservice-and-write-a-timer-session-bean/>
http://www.diotalevi.com/weblog/2006/10/30/java-ee-in-the-trenches-how-to-use-the-timerservice-and-write-a-timer-session-bean/
<
http://java.sun.com/javaee/5/docs/tutorial/doc/bnboy.html>
http://java.sun.com/javaee/5/docs/tutorial/doc/bnboy.html
Hope this helps,
Manfred
From: Dru Devore [ <mailto:ddevore_at_duckhouse.us> mailto:ddevore_at_duckhouse.us]
Sent: Thursday, July 24, 2008 8:18 AM
To: <mailto:users_at_glassfish.dev.java.net> users_at_glassfish.dev.java.net
Subject: RE: Keeping a timer alive
When it was written I am sure there was but I can't think of any presently.
I am looking for examples/tutorials do you have any good ones?
-------- Original Message --------
Subject: RE: Keeping a timer alive
From: "Manfred Riem" <mriem_at_manorrock.org>
Date: Thu, July 24, 2008 9:55 am
To: < <mailto:users_at_glassfish.dev.java> users_at_glassfish.dev.java.net>
Any reason why you are not EJB timer service?
From: Dru Devore [ <mailto:ddevore_at_duckhouse.us> mailto:ddevore_at_duckhouse.us]
Sent: Thursday, July 24, 2008 7:52 AM
To: glassfish_user
Subject: Keeping a timer alive
I have a timer that is running in a servlet in Glassfish and I encountered a problem with it last night, the timer thread stopped. I need a way to ensure the timer is running and if it does stop, to restart it. Is there a way to have the server monitor this or am I hoping for too much?
--------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe_at_glassfish.dev.java.net For additional commands, e-mail: users-help_at_glassfish.dev.java.net
--------------------------------------------------------------------- To unsubscribe, e-mail: <mailto:users-unsubscribe_at_glassfish.dev.java.net> users-unsubscribe_at_glassfish.dev.java.net For additional commands, e-mail: <mailto:users-help_at_glassfish.dev.java.net> users-help_at_glassfish.dev.java.net
--------------------------------------------------------------------- To unsubscribe, e-mail: <mailto:users-unsubscribe_at_glassfish.dev.java.net> users-unsubscribe_at_glassfish.dev.java.net For additional commands, e-mail: <mailto:users-help_at_glassfish.dev.java.net> users-help_at_glassfish.dev.java.net
--------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe_at_glassfish.dev.java.net For additional commands, e-mail: users-help_at_glassfish.dev.java.net