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# frozen_string_literal: true
module Gitlab
module Database
module LoadBalancing
class SidekiqClientMiddleware
def call(worker_class, job, _queue, _redis_pool)
# Mailers can't be constantized
worker_class = worker_class.to_s.safe_constantize
if load_balancing_enabled?(worker_class)
job['worker_data_consistency'] = worker_class.get_data_consistency
set_data_consistency_location!(job) unless location_already_provided?(job)
else
job['worker_data_consistency'] = ::WorkerAttributes::DEFAULT_DATA_CONSISTENCY
end
yield
end
private
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
def set_data_consistency_location!(job)
if Session.current.use_primary?
job['database_write_location'] = load_balancer.primary_write_location
else
job['database_replica_location'] = load_balancer.host.database_replica_location
end
end
def location_already_provided?(job)
job['database_replica_location'] || job['database_write_location']
end
def load_balancer
LoadBalancing.proxy.load_balancer
end
end
end
end
end
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