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# frozen_string_literal: true
require 'redis'
module Gitlab
module Instrumentation
module RedisInterceptor
def call(*args, &block)
start = Time.now
super(*args, &block)
ensure
duration = (Time.now - start)
if ::RequestStore.active?
::Gitlab::Instrumentation::Redis.increment_request_count
::Gitlab::Instrumentation::Redis.add_duration(duration)
::Gitlab::Instrumentation::Redis.add_call_details(duration, args)
end
end
end
class Redis
REDIS_REQUEST_COUNT = :redis_request_count
REDIS_CALL_DURATION = :redis_call_duration
REDIS_CALL_DETAILS = :redis_call_details
def self.get_request_count
::RequestStore[REDIS_REQUEST_COUNT] || 0
end
def self.increment_request_count
::RequestStore[REDIS_REQUEST_COUNT] ||= 0
::RequestStore[REDIS_REQUEST_COUNT] += 1
end
def self.detail_store
::RequestStore[REDIS_CALL_DETAILS] ||= []
end
def self.query_time
query_time = ::RequestStore[REDIS_CALL_DURATION] || 0
query_time.round(::Gitlab::InstrumentationHelper::DURATION_PRECISION)
end
def self.add_duration(duration)
total_time = query_time + duration
::RequestStore[REDIS_CALL_DURATION] = total_time
end
def self.add_call_details(duration, args)
return unless Gitlab::PerformanceBar.enabled_for_request?
# redis-rb passes an array (e.g. [:get, key])
return unless args.length == 1
detail_store << {
cmd: args.first,
duration: duration,
backtrace: ::Gitlab::BacktraceCleaner.clean_backtrace(caller)
}
end
end
end
end
class ::Redis::Client
prepend ::Gitlab::Instrumentation::RedisInterceptor
end
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