Better integration with queuedjobs

[sminnee]

There's a couple of things that could be done to this module to make it work more nicely with queuedjobs.

• Come bundled with a crontask for running the job queue
• Reduce the amount of boilerplate needed to do crontask that adds a buildtask-execution to the job queue (a handy pattern for managing your background tasks)

This might be facilitated with #9

[sminnee]

The following is used in a specific project to hook up queuedjobs. With a bit of checking to bypass the CronTask if Symbiote\QueuedJobs\Tasks\ProcessJobQueueTask didn't exist, it could be bundled in the crontask package.

However, it would probably necessitate a major version bump of this package, as people would need to disable any other executions of ProcessJobQueueTask they had set up.

Would that be reasonable?

<?php
use SilverStripe\CronTask\Interfaces\CronTask;
use Symbiote\QueuedJobs\Tasks\ProcessJobQueueTask;
use SilverStripe\Control\HTTPRequest;
/**
 * Trigger the queuedjob running from CronTask
 */
class QueuedJobsCron implements CronTask
{
    /**
     * Run every 6 hours
     *
     * @return string
     */
    public function getSchedule()
    {
        return "* * * * *";
    }
    /**
     * Run the build task SilverStripeElasticaReindexTask
     * @return void
     */
    public function process()
    {
        echo "Running ProcessJobQueueTask via CronTask...\n";
        $task = new ProcessJobQueueTask();
        $request = new HTTPRequest('GET', '/', []);
        $task->run($request);
    }
}