Go based Queue / Background Worker example.
Please read the companion Heroku Devcenter article.
After app setup you can test with the following commands:
In one terminal run the following...
heroku logs --tail -a <app name>
In a different terminal run the following...
curl -XPOST "https://<app name>.herokuapp.com/index" -d '{"url": "http://google.com"}'
And you should see something like the following scroll by in the first terminal...
2015-06-23T18:29:35.663096+00:00 heroku[router]: at=info method=POST path="/index" host=<app name>.herokuapp.com request_id=84f9d369-7d6e-4313-8f16-9db9bb7ed251 fwd="76.115.27.201" dyno=web.1 connect=19ms service=31ms status=202 bytes=141
2015-06-23T18:29:35.623878+00:00 app[web.1]: [negroni] Started POST /index
2015-06-23T18:29:35.644483+00:00 app[web.1]: [negroni] Completed 202 Accepted in 20.586125ms
2015-06-23T18:29:37.750543+00:00 app[worker.1]: time="2015-06-23T18:29:37Z" level=info msg="Processing IndexRequest! (not really)" IndexRequest={http://google.com}
2015-06-23T18:29:37.753021+00:00 app[worker.1]: 2015/06/23 18:29:37 event=job_worked job_id=1 job_type=IndexRequests
This shows the web process getting the request to index a url (http://google.com) and then the worker picking up the raw job and "processing" it.