Hi,
I am trying to integrate a scheduler into my web application. I believe my
question is probably very trivial but I am missing some vital Java
knowledge. Please let me explain…
My web application currently allows users to choose, customise and run
reports.
I now need to add a detailed scheduler so that users can choose when to run
the reports and how often etc.
I'm using Spring for the db access, and I was going to use Quartz for
scheduling.
A basic Quartz schedule looks something like the following:
public class SimpleExample {
public void run() throws Exception {
// First we must get a reference to a scheduler
// This schedule info is stored in a db, defined in the
quartz.properties file.
SchedulerFactory sf = new StdSchedulerFactory();
Scheduler sched = sf.getScheduler();
// Add jobs and triggers to schedule.
// Start up the scheduler (nothing can actually run until the
// scheduler has been started)
sched.start();
// Wait for a short period of time so scheduler has chance to run
jobs.
sched.shutdown();
}
public static void main(String[] args) throws Exception {
SimpleExample example = new SimpleExample();
example.run();
}
}
More details about a really basic example can be found here:
http://wiki.opensymphony.com/display/QRTZ1/TutorialLesson1
I can run this fine as a standalone test.
The basics of my web application are as follows:
MyApp which extends WebApplication.
Loads of classes which extend WebPage
A MySession class which extends WebSession
What I'm not sure about is where I should be instantiating the
SchedulerFactory within my application so that all users can update any
schedule (i.e. so there is kind-of-like global access to the scheduler
object) and so that the SchedulerFactory is only instantiated the once.
I can't instantiate it in a web page as this will be user specific.
I could instantiate it in the MyApp class but then I don't have access to it
from the web pages.
Any help whatsoever, just to point me in the right direction, would be much
appreciated.
Thanks
Will
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