59 lines
1.5 KiB
Ruby
59 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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module Subscribers
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# Class for tracking the rendering timings of views.
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class ActionView < ActiveSupport::Subscriber
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include Gitlab::Metrics::Methods
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define_histogram :gitlab_view_rendering_duration_seconds do
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docstring 'View rendering time'
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base_labels Transaction::BASE_LABELS.merge({ path: nil })
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buckets [0.001, 0.01, 0.1, 1, 10.0]
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with_feature :prometheus_metrics_view_instrumentation
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end
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attach_to :action_view
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SERIES = 'views'.freeze
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def render_template(event)
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track(event) if current_transaction
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end
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alias_method :render_view, :render_template
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private
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def track(event)
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values = values_for(event)
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tags = tags_for(event)
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self.class.gitlab_view_rendering_duration_seconds.observe(current_transaction.labels.merge(tags), event.duration)
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current_transaction.increment(:view_duration, event.duration)
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current_transaction.add_metric(SERIES, values, tags)
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end
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def relative_path(path)
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path.gsub(%r{^#{Rails.root.to_s}/?}, '')
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end
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def values_for(event)
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{ duration: event.duration }
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end
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def tags_for(event)
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path = relative_path(event.payload[:identifier])
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{ view: path }
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end
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def current_transaction
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Transaction.current
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end
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end
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end
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end
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end
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