A Pattern for Async Task Queue Results

February 21, 2015 Suppose we have a web app in which the user triggers a slow, expensive task, like transcoding a video or generating a report. We’ve wisely chosen to offload the job to a background worker, leaving the web server free to handle other requests (and if not, get started with this helpful overview of the pattern by our comrades at Heroku). Our app scales but now we have a new problem: