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require 'securerandom'
require 'active_support/notifications'
require 'active_support/log_subscriber'
module Flipper
module Instrumentation
class LogSubscriber < ::ActiveSupport::LogSubscriber
# Logs a feature operation.
#
# Example Output
#
# flipper[:search].enabled?(user)
# # Flipper feature(search) enabled? false (1.2ms) [ thing=... ]
#
# Returns nothing.
def feature_operation(event)
return unless logger.debug?
feature_name = event.payload[:feature_name]
gate_name = event.payload[:gate_name]
operation = event.payload[:operation]
result = event.payload[:result]
thing = event.payload[:thing]
description = "Flipper feature(#{feature_name}) #{operation} #{result.inspect}"
details = "thing=#{thing.inspect}"
details += " gate_name=#{gate_name}" unless gate_name.nil?
name = '%s (%.1fms)' % [description, event.duration]
debug " #{color(name, CYAN, true)} [ #{details} ]"
end
# Logs an adapter operation. If operation is for a feature, then that
# feature is included in log output.
#
# Example Output
#
# # log output for adapter operation with feature
# # Flipper feature(search) adapter(memory) enable (0.0ms) [ result=...]
#
# # log output for adapter operation with no feature
# # Flipper adapter(memory) features (0.0ms) [ result=... ]
#
# Returns nothing.
def adapter_operation(event)
return unless logger.debug?
feature_name = event.payload[:feature_name]
adapter_name = event.payload[:adapter_name]
gate_name = event.payload[:gate_name]
operation = event.payload[:operation]
result = event.payload[:result]
description = 'Flipper '
description << "feature(#{feature_name}) " unless feature_name.nil?
description << "adapter(#{adapter_name}) "
description << "#{operation} "
details = "result=#{result.inspect}"
name = '%s (%.1fms)' % [description, event.duration]
debug " #{color(name, CYAN, true)} [ #{details} ]"
end
def logger
self.class.logger
end
end
end
Instrumentation::LogSubscriber.attach_to InstrumentationNamespace
end
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