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# frozen_string_literal: true
module Gitlab
module Tracing
module Rails
class ActiveRecordSubscriber
include RailsCommon
ACTIVE_RECORD_NOTIFICATION_TOPIC = 'sql.active_record'
OPERATION_NAME_PREFIX = 'active_record:'
DEFAULT_OPERATION_NAME = 'sqlquery'
# Instruments Rails ActiveRecord events for opentracing.
# Returns a lambda, which, when called will unsubscribe from the notifications
def self.instrument
subscriber = new
subscription = ActiveSupport::Notifications.subscribe(ACTIVE_RECORD_NOTIFICATION_TOPIC) do |_, start, finish, _, payload|
subscriber.notify(start, finish, payload)
end
create_unsubscriber [subscription]
end
# For more information on the payloads: https://guides.rubyonrails.org/active_support_instrumentation.html
def notify(start, finish, payload)
generate_span_for_notification(notification_name(payload), start, finish, payload, tags_for_notification(payload))
end
private
def notification_name(payload)
OPERATION_NAME_PREFIX + (payload[:name].presence || DEFAULT_OPERATION_NAME)
end
def tags_for_notification(payload)
{
'component' => 'ActiveRecord',
'span.kind' => 'client',
'db.type' => 'sql',
'db.connection_id' => payload[:connection_id],
'db.cached' => payload[:cached] || false,
'db.statement' => payload[:sql]
}
end
end
end
end
end
|
