Oh, yes. I didnt consider the Jdk1.4 support in app servers.
Best thing to do is to Check with DB2 documentation/support and find out whether
it supports Jobs like oracle. Hope it wud. :-)
-----Original Message-----
From: Stefan Frank [mailto:s.frank@(protected)]
Sent: Tuesday, August 05, 2003 7:54 PM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: where to put the schedular
Is this really such a good Idea?! The Timer starts a separate Thread for
Scheduling - and this will interfere with the Thread-Pooling Mechanisms
of most common App-Servers (Starting Threads in a Container was once
considered a no-no in j2ee: If I remember it right, then there are
mechanisms in the new JCA that allow you to request a thread from the
AppServer.) Almost every vendor formerly had some proprietary extensions
to perform at least basic Scheduling from inside the app-server - this
has finally resulted in the introduction of a TimerService(
http://www.theserverside.com/resources/article.jsp?l=MonsonHaefel-Column4)
TimerService's can be created at runtime, so reading in a Table and
setting up the Timers is possible. Using a TimerService should save you
from being tied to the Database and also eliminates the need for a
separate Box/process that runs outside your Appserver. But I'm not
completely sure, which server already supports 1.4. Does anyone have
more info on the Adaption of 1.4?!
cheers
stf
Rangarajan , Suresh ( Cognizant ) wrote:
> You can use the
java.util.Timer and TimerTask classes for this purpose.
> On startup, you can read the tables and setup the timer.
>
> But, you can not dynamically change the values in the table...
>
>
> -----Original Message-----
> From: Pradeep Kumar [mailto:pradeepk@(protected)]
> Sent: Tuesday, August 05, 2003 6:13 PM
> To: J2EEPATTERNS-INTEREST@(protected)
> Subject: where to put the schedular
>
>
> Hello friends,
>
> This may not be the right forum to ask this question. But I couldn't find the
> appropriate forum.
>
> I have requirement, wherein I will have to run 2 types of schedulers. I am
> using DB2 8.1 and WebSphere 5 running on windows.
>
> One scheduler, should wake up on a particular date and time defined in a
> table and then updates some other tables.
> Another scheduler, should wake up on a particular date and time defined in a
> table and then sends out emails.
>
> I think I have 3 options:
> 1. Define and configure the schedulers using the DB2 tools.
> 2. Build custom schedulers in my WebSphere application, that
> periodically checks the system date with scheduled date and then updates the
> relevant table and also sends out email using the Java mail APIs
> 3. write a stand alone java program and use a windows scheduler.
>
> These schedulers are purely back-end activities and do not depend on the user
> actions. The first option may be the appropriate one, but I am not sure about
> the implications.
>
> Your comments are appreciated.
>
> Thanks.
> Pradeep Kumar
> MindTree Consulting
> 91 80 6711777 Xtn: 2033
>
>
>
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