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redis.rb
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redis.rb
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require 'redis'
require 'atomic'
# Instrument Redis time
class Redis::Client
class << self
attr_accessor :query_time, :query_count
end
self.query_count = Atomic.new(0)
self.query_time = Atomic.new(0)
def call_with_timing(*args, &block)
start = Time.now
call_without_timing(*args, &block)
ensure
duration = (Time.now - start)
Redis::Client.query_time.update { |value| value + duration }
Redis::Client.query_count.update { |value| value + 1 }
end
alias_method_chain :call, :timing
end
module Peek
module Views
class Redis < View
def duration
::Redis::Client.query_time.value
end
def formatted_duration
ms = duration * 1000
if ms >= 1000
"%.2fms" % ms
else
"%.0fms" % ms
end
end
def calls
::Redis::Client.query_count.value
end
def results
{ :duration => formatted_duration, :calls => calls }
end
private
def setup_subscribers
# Reset each counter when a new request starts
subscribe 'start_processing.action_controller' do
::Redis::Client.query_time.value = 0
::Redis::Client.query_count.value = 0
end
end
end
end
end