Some Sidekiq jobs in my app are scheduled to change the state of a resource to cancelled unless a user responds within a certain timeframe. There is a lot of information about how to best accomplish this task, but none of it actually cancels the job.
To cancel a job, the code in the wiki says:
class MyWorker
include Sidekiq::Worker
def perform(thing_id)
return if cancelled?
thing = Thing.find thing_id
thing.renege!
end
def cancelled?
Sidekiq.redis {|c| c.exists("cancelled-#{jid}") }
end
def self.cancel!(jid)
Sidekiq.redis {|c| c.setex("cancelled-#{jid}", 86400, 1) }
end
end
Yet here it's suggested that I do something like
def perform(thing_id)
thing = Thing.find thing_id
while !cancel?(thing)
thing.ignore!
end
end
def cancel?(thing_id)
thing = Thing.find thing_id
thing.matched? || thing.passed?
end
What's confusing about this and similar code on the wiki is none of it actually cancels the job. The above example just performs an update on thing if cancelled? returns false (as it should), but doesn't cancel if and when it returns true in the future. It just fails with an aasm transition error message and gets sent to the RetrySet. Calling MyWorker.cancel! jid in model code throws an undefined variable error. How can I access that jid in the model? How can actually cancel or delete that specific job? Thanks!
Ok, so turns out I had one question already answered. One of the code sets I included was a functionally similar version of the code from the wiki. The solution to the other question ("how can I access that jid in the model?") seems really obvious if you're not still new to programming, but basically: store the jid in a database column and then retrieve/update it whenever it's needed! Duh!