polling with delayed_job

I have a process which takes generally a few seconds to complete so I'm trying to use delayed_job to handle it asynchronously. The job itself works fine, my question is how to go about polling the job to find out if it's done. I can get an id from delayed_job by simply assigning it to a variable: job = Available.delay.dosomething(:var => 1234) +------+----------+----------+------------+-----------