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# frozen_string_literal: true
module Gitlab
module Metrics
module Subscribers
# Class for tracking the rendering timings of views.
class ActionView < ActiveSupport::Subscriber
attach_to :action_view
SERIES = 'views'
def render_template(event)
track(event) if current_transaction
end
alias_method :render_view, :render_template
private
def track(event)
tags = tags_for(event)
current_transaction.observe(:gitlab_view_rendering_duration_seconds, event.duration, tags) do
docstring 'View rendering time'
label_keys %i(view)
buckets [0.001, 0.01, 0.1, 1, 10.0]
with_feature :prometheus_metrics_view_instrumentation
end
current_transaction.increment(:gitlab_transaction_view_duration_total, event.duration)
end
def relative_path(path)
path.gsub(%r{^#{Rails.root}/?}, '')
end
def tags_for(event)
path = relative_path(event.payload[:identifier])
{ view: path }
end
def current_transaction
Transaction.current
end
end
end
end
end
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