Re: [ovirt-devel] Certain questions about Quartz based scheduling in oVirt
Hi Shubhendu,
----- Original Message -----
From: "Shubhendu Tripathi" <shtripat(a)redhat.com>
To: devel(a)ovirt.org
Sent: Monday, November 24, 2014 8:58:34 AM
Subject: [ovirt-devel] Certain questions about Quartz based scheduling in oVirt
Hi All,
We are in a requirement where we need to schedule jobs at certain time
interval, hourly, daily, weekly and monthly (i.e. repetitive and cron
kind of scheduling).
I was trying to understand quartz based scheduling mechanism in oVirt to
achieve the scenarios.
Have some basic questions regarding the same -
1. Is there is mechanism to persist the scheduling data in oVirt ?
In ovirt we do not persist the jobs. The application reschedule the jobs when it starts
and programmatically triggers jobs when required.
On packaging/services/ovirt-engine/ovirt-engine.xml.in we specify the job store
configuration
as RAMJobStore, which is a volatile:
<property name="org.quartz.jobStore.class"
value="org.quartz.simpl.RAMJobStore"/>
You may select other implementation. See:
http://quartz-scheduler.org/api/2.2.0/org/quartz/spi/JobStore.html
2. How to tackle edit and rescheduling of jobs ?
You can have a look at org.ovirt.engine.core.utils.timer.SchedulerUtil interface in
the 'scheduler' project which provides that functionality, and the related
classes.
But if not special requirements, i guess the shipped quartz implementation should be
enough:
http://quartz-scheduler.org/documentation/quartz-2.x/tutorials/tutorial-l...
Kindly guide on how to achieve these.
Thanks and Regards,
Shubhendu
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