Sidekiq + ActiveJob callbacks run too fast

Question

I use Sidekiq with ActiveJob and its callbacks. At the beginning I'd like to say that my problem sounds very similar to this one: https://github.com/mperham/sidekiq/wiki/Problems-and-Troubleshooting#cannot-find-modelname-with-id12345 however I don't use ActiveRecord callbacks.

I have a service having the method like this:

def call
  array_of_batches.each do |batch|
    MyJob.perform_later(batch)
  end
end

Which means it creates many jobs that are performed concurrently. In the job I use before_perform and after_perform callbacks and I have 2 problems with each of them.

1:

before_perform do |job|
  # do something
  return if my_object.status == 'performed'
  my_object.update(status: 'performed')
  send_notification
end

In the case above it often happens that when a few jobs are running concurrently I send a notification a few times instead of only one. In a few jobs it goes to the end instead of only once in a first job that is run.

2:

after_perform do |job|
  my_object.decrement!(:count)
  return unless my_object.count.zero?
  my_object.update(status: 'finished')
  send_notification
end

In the case above it happens that decrementing is not on time and because of that the object status is not updated correctly and a notification is never sent. For example when the count value before performing 10 jobs equals 10 then after performing all the jobs count attribute equals 2 or 3 instead of 0 since we were supposed to decrement the value every single time.

Is it possible to fix those cases somehow? Cheers