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ruby-on-railsrubydebouncingcrampeventsource

How to create a Rails/Ruby method similar to javascript throttle/debounce function


In our application we expose a callback route for an external service to hit. When we receive the callback, we publish an update to client-side subscribers using Eventsource on the client/browser-side and cramp on the server side. Sometimes, however, we get bombarded with callback requests from this external service which results in us publishing a crap ton of updates to the client. Is there a way on the Rails-side, similar to a javascript debounce function, that would wait a set time between callbacks received to publish the message?

We're using sidekiq + threads already, so open to suggestions using those tools.


Solution

  • There is a Sidekiq-debounce gem available.

    Another approach (without such gem) is to use the Rails.cache to trigger your execution only once per x time

    delay = 1.minute
    Rails.cache.fetch('unique-identifier-of-the-job', expires_in: delay) do
     YourActiveJobHere.set(wait: delay).perform_later('your-action')
    end