SilverStripe Queued Jobs Module
<marcus (at) silverstripe (dot) com (dot) au>
- SilverStripe 2.4.x
- Access to create cron jobs
See http://github.com/nyeholt/silverstripe-queuedjobs/wiki/ for more complete documentation
The Queued Jobs module provides a framework for SilverStripe developers to define long running processes that should be run as background tasks. This asynchronous processing allows users to continue using the system while long running tasks proceed when time permits. It also lets developers set these processes to be executed in the future.
The module comes with
- A section in the CMS for viewing a list of currently running jobs or scheduled jobs.
- An abstract skeleton class for defining your own jobs
- A task that is executed as a cronjob for collecting and executing jobs.
Quick Usage Overview
- Install the cronjob needed to manage all the jobs within the system. It is best to have this execute as the same user as your webserver - this prevents any problems with file permissions.
*/1 * * * * php /path/to/silverstripe/sapphire/cli-script.php dev/tasks/ProcessJobQueueTask
- If your code is to make use of the 'long' jobs, ie that could take days to process, also install another task that processes this queue. Its time of execution can be left a little longer.
*/15 * * * * php /path/to/silverstripe/sapphire/cli-script.php dev/tasks/ProcessJobQueueTask queue=2
From your code, add a new job for execution.
$publish = new PublishItemsJob(21); singleton('QueuedJobService')->queueJob($publish);
To schedule a job to be executed at some point in the future, pass a date through with the call to queueJob The following will run the publish job in 1 day's time from now.
$publish = new PublishItemsJob(21); singleton('QueuedJobService')->queueJob($publish, date('Y-m-d H:i:s', time() + 86400));
Using QueuedJob::IMMEDIATE jobs
Queued jobs can be executed immediately (instead of being limited by cron's 1 minute interval) by using a file based notification system. This relies on something like inotifywait to monitor a folder (by default this is SILVERSTRIPE_CACHE_DIR/queuedjobs) and triggering the ProcessJobQueueTask as above but passing job=$filename as the argument. An example script is in queuedjobs/scripts that will run inotifywait and then call the ProcessJobQueueTask when a new job is ready to run.
Note - if you do NOT have this running, make sure to set
QueuedJobService::$use_shutdown_function = true;
so that immediate mode jobs don't stall. By setting this to true, immediate jobs will be executed after
the request finishes as the php script ends.
To make sure your job works, you can first try to execute the job directly outside the framework of the queues - this can be done by manually calling the setup() and process() methods. If it works fine under these circumstances, try having getJobType() return QueuedJob::IMMEDIATE to have execution work immediately, without being persisted or executed via cron. If this works, next make sure your cronjob is configured and executing correctly.
QueuedJobDescriptor ADD INDEX (