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From <Ramkumar.I...@cognizant.com>
Subject RE: external scheduler integration
Date Wed, 31 Oct 2012 00:49:17 GMT
I am familiar only with Quartz for scheduling. Why was it not an easy solution ? I remember
(before getting introduced to CAMEL) storing the actual job to be processed as a bean in a
trigger(along with a vector of future jobs to be processed after this job) and this job would
be de-serialized from database and executed and a new job may be created in place.

The algo basically was

Scheduler wakes up; Fires DB job; Job Unmarshalls; Executes logic; Updates execution history;
Points to next job

How can this be done for external scheduler ? Will using a database solve this problem ? The
above logic can be a CAMEL Logic. We used to run the above on cluster as most jobs were decoupled
among themselves and acted on computing values on read only data?

-----Original Message-----
From: Christian Müller [mailto:christian.mueller@gmail.com]
Sent: Wednesday, October 31, 2012 4:29 AM
To: users@camel.apache.org
Subject: Re: external scheduler integration

We have similar requirements.
An external scheduler (Tivoli) is used to trigger some batch processing
(reading and processing large files). The trigger happens via HTTP and
provides the file name which should be processed.
After we finished the processing (multiple routes which are decoupled by
queues) we have to return the HTTP call with a status code. Like 0 == OK, 1
== Error 1, 2 == Error 2, ... And of course, we have to stop the route...

For this, we have implemented our own solution because this was not
possible with a route policy (we need something like a "use case policy").
We use the Camel API to start/stop routes, to track inflight messages and
whether they failed or not. Not an easy solution at this time...

Best,
Christian

On Sun, Oct 28, 2012 at 4:48 PM, bung_ho <bung_ho@hotmail.com> wrote:

> For various reasons it's not practical to use quartz etc to schedule my
> routes, all the scheduling must be done using the corporate scheduler. I
> have searched the forums and it seems all scheduler discussion is based on
> the built-in quartz/cron etc.
>
> Anyway my idea to integrate with the external scheduler is simply to use a
> <from uri="file: ..." /> that looks for a marker file that will be placed
> by
> the external scheduler, this will tell the route when to run. I figure
> also,
> the route can drop another marker file at the end to report success or
> failure; the external scheduler can also be made to look for these files to
> get the job status.
>
> Can anyone think of any drawbacks to this approach, or have any better
> suggestions?
>
> Thanks
>
>
>
> --
> View this message in context:
> http://camel.465427.n5.nabble.com/external-scheduler-integration-tp5721668.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>



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