79 lines
2.2 KiB
Ruby
79 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module BackgroundMigration
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def self.queue
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@queue ||= BackgroundMigrationWorker.sidekiq_options['queue']
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end
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# Begins stealing jobs from the background migrations queue, blocking the
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# caller until all jobs have been completed.
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#
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# When a migration raises a StandardError is is going to be retries up to
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# three times, for example, to recover from a deadlock.
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#
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# When Exception is being raised, it enqueues the migration again, and
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# re-raises the exception.
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#
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# steal_class - The name of the class for which to steal jobs.
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def self.steal(steal_class, retry_dead_jobs: false)
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queues = [
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Sidekiq::ScheduledSet.new,
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Sidekiq::Queue.new(self.queue)
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]
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if retry_dead_jobs
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queues << Sidekiq::RetrySet.new
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queues << Sidekiq::DeadSet.new
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end
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queues.each do |queue|
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queue.each do |job|
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migration_class, migration_args = job.args
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next unless job.queue == self.queue
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next unless migration_class == steal_class
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begin
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perform(migration_class, migration_args) if job.delete
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rescue Exception # rubocop:disable Lint/RescueException
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BackgroundMigrationWorker # enqueue this migration again
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.perform_async(migration_class, migration_args)
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raise
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end
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end
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end
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end
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##
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# Performs a background migration.
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#
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# class_name - The name of the background migration class as defined in the
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# Gitlab::BackgroundMigration namespace.
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#
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# arguments - The arguments to pass to the background migration's "perform"
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# method.
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def self.perform(class_name, arguments)
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migration_class_for(class_name).new.perform(*arguments)
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end
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def self.exists?(migration_class)
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enqueued = Sidekiq::Queue.new(self.queue)
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scheduled = Sidekiq::ScheduledSet.new
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[enqueued, scheduled].each do |queue|
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queue.each do |job|
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return true if job.queue == self.queue && job.args.first == migration_class
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end
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end
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false
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end
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def self.migration_class_for(class_name)
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const_get(class_name)
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end
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end
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end
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