debian-mirror-gitlab/lib/gitlab/sidekiq_status.rb

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# frozen_string_literal: true
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module Gitlab
# The SidekiqStatus module and its child classes can be used for checking if a
# Sidekiq job has been processed or not.
#
# To check if a job has been completed, simply pass the job ID to the
# `completed?` method:
#
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# job_id = SomeWorker.with_status.perform_async(...)
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#
# if Gitlab::SidekiqStatus.completed?(job_id)
# ...
# end
#
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# If you do not use `with_status`, and the worker class does not declare
# `status_expiration` in its `sidekiq_options`, then this status will not be
# stored.
#
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# For each job ID registered a separate key is stored in Redis, making lookups
# much faster than using Sidekiq's built-in job finding/status API. These keys
# expire after a certain period of time to prevent storing too many keys in
# Redis.
module SidekiqStatus
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STATUS_KEY = 'gitlab-sidekiq-status:%s'
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# The default time (in seconds) after which a status key is expired
# automatically. The default of 30 minutes should be more than sufficient
# for most jobs.
DEFAULT_EXPIRATION = 30.minutes.to_i
# Starts tracking of the given job.
#
# jid - The Sidekiq job ID
# expire - The expiration time of the Redis key.
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def self.set(jid, expire = DEFAULT_EXPIRATION)
return unless expire
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Sidekiq.redis do |redis|
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redis.set(key_for(jid), 1, ex: expire)
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end
end
# Stops the tracking of the given job.
#
# jid - The Sidekiq job ID to remove.
def self.unset(jid)
Sidekiq.redis do |redis|
redis.del(key_for(jid))
end
end
# Returns true if all the given job have been completed.
#
# job_ids - The Sidekiq job IDs to check.
#
# Returns true or false.
def self.all_completed?(job_ids)
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self.num_running(job_ids) == 0
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end
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# Returns true if the given job is running or enqueued.
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#
# job_id - The Sidekiq job ID to check.
def self.running?(job_id)
num_running([job_id]) > 0
end
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# Returns the number of jobs that are running or enqueued.
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#
# job_ids - The Sidekiq job IDs to check.
def self.num_running(job_ids)
responses = self.job_status(job_ids)
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responses.count(&:present?)
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end
# Returns the number of jobs that have completed.
#
# job_ids - The Sidekiq job IDs to check.
def self.num_completed(job_ids)
job_ids.size - self.num_running(job_ids)
end
# Returns the job status for each of the given job IDs.
#
# job_ids - The Sidekiq job IDs to check.
#
# Returns an array of true or false indicating job completion.
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# true = job is still running or enqueued
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# false = job completed
def self.job_status(job_ids)
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return [] if job_ids.empty?
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keys = job_ids.map { |jid| key_for(jid) }
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Sidekiq
.redis { |redis| redis.mget(*keys) }
.map { |result| !result.nil? }
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end
# Returns the JIDs that are completed
#
# job_ids - The Sidekiq job IDs to check.
#
# Returns an array of completed JIDs
def self.completed_jids(job_ids)
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statuses = job_status(job_ids)
completed = []
job_ids.zip(statuses).each do |job_id, status|
completed << job_id unless status
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end
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completed
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end
def self.key_for(jid)
STATUS_KEY % jid
end
end
end