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module Gitlab
module Metrics
module Subscribers
# Class for tracking the total time spent in Rails cache calls
# http://guides.rubyonrails.org/active_support_instrumentation.html
class RailsCache < ActiveSupport::Subscriber
attach_to :active_support
def cache_read(event)
increment(:cache_read, event.duration)
return unless current_transaction
return if event.payload[:super_operation] == :fetch
if event.payload[:hit]
current_transaction.increment(:cache_read_hit_count, 1)
else
current_transaction.increment(:cache_read_miss_count, 1)
end
end
def cache_write(event)
increment(:cache_write, event.duration)
end
def cache_delete(event)
increment(:cache_delete, event.duration)
end
def cache_exist?(event)
increment(:cache_exists, event.duration)
end
def cache_fetch_hit(event)
return unless current_transaction
current_transaction.increment(:cache_read_hit_count, 1)
end
def cache_generate(event)
return unless current_transaction
current_transaction.increment(:cache_read_miss_count, 1)
end
def increment(key, duration)
return unless current_transaction
current_transaction.increment(:cache_duration, duration)
current_transaction.increment(:cache_count, 1)
current_transaction.increment("#{key}_duration".to_sym, duration)
current_transaction.increment("#{key}_count".to_sym, 1)
end
private
def current_transaction
Transaction.current
end
end
end
end
end
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