debian-mirror-gitlab/lib/gitlab/database/load_balancing/sidekiq_client_middleware.rb

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# frozen_string_literal: true
module Gitlab
module Database
module LoadBalancing
class SidekiqClientMiddleware
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include Gitlab::Utils::StrongMemoize
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def call(worker_class, job, _queue, _redis_pool)
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# Mailers can't be constantized
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worker_class = worker_class.to_s.safe_constantize
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if load_balancing_enabled?(worker_class)
job['worker_data_consistency'] = worker_class.get_data_consistency
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set_data_consistency_locations!(job) unless job['wal_locations']
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else
job['worker_data_consistency'] = ::WorkerAttributes::DEFAULT_DATA_CONSISTENCY
end
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yield
end
private
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def load_balancing_enabled?(worker_class)
worker_class &&
worker_class.include?(::ApplicationWorker) &&
worker_class.utilizes_load_balancing_capabilities? &&
worker_class.get_data_consistency_feature_flag_enabled?
end
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def set_data_consistency_locations!(job)
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locations = {}
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::Gitlab::Database::LoadBalancing.each_load_balancer do |lb|
if (location = wal_location_for(lb))
locations[lb.name] = location
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end
end
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job['wal_locations'] = locations
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job['wal_location_source'] = wal_location_source
end
def wal_location_source
if ::Gitlab::Database::LoadBalancing.primary_only? || uses_primary?
::Gitlab::Database::LoadBalancing::ROLE_PRIMARY
else
::Gitlab::Database::LoadBalancing::ROLE_REPLICA
end
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end
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def wal_location_for(load_balancer)
# When only using the primary there's no need for any WAL queries.
return if load_balancer.primary_only?
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if uses_primary?
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load_balancer.primary_write_location
else
load_balancer.host.database_replica_location
end
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end
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def uses_primary?
::Gitlab::Database::LoadBalancing::Session.current.use_primary?
end
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end
end
end
end