class ActiveSupport::Notifications::Event
Attributes
children[R]
end[R]
name[R]
payload[RW]
time[R]
transaction_id[R]
Public Class Methods
new(name, start, ending, transaction_id, payload)
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# File lib/active_support/notifications/instrumenter.rb, line 62 def initialize(name, start, ending, transaction_id, payload) @name = name @payload = payload.dup @time = start ? start.to_f * 1_000.0 : start @transaction_id = transaction_id @end = ending ? ending.to_f * 1_000.0 : ending @children = [] @cpu_time_start = 0.0 @cpu_time_finish = 0.0 @allocation_count_start = 0 @allocation_count_finish = 0 end
Public Instance Methods
<<(event)
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# File lib/active_support/notifications/instrumenter.rb, line 136 def <<(event) @children << event end
allocations()
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Returns the number of allocations made since the call to start!
and the call to finish!
# File lib/active_support/notifications/instrumenter.rb, line 116 def allocations @allocation_count_finish - @allocation_count_start end
cpu_time()
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Returns the CPU time (in milliseconds) passed since the call to start!
and the call to finish!
# File lib/active_support/notifications/instrumenter.rb, line 104 def cpu_time @cpu_time_finish - @cpu_time_start end
duration()
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Returns the difference in milliseconds between when the execution of the event started and when it ended.
ActiveSupport::Notifications.subscribe('wait') do |*args| @event = ActiveSupport::Notifications::Event.new(*args) end ActiveSupport::Notifications.instrument('wait') do sleep 1 end @event.duration # => 1000.138
# File lib/active_support/notifications/instrumenter.rb, line 132 def duration self.end - time end
finish!()
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Record information at the time this event finishes
# File lib/active_support/notifications/instrumenter.rb, line 96 def finish! @cpu_time_finish = now_cpu @end = now @allocation_count_finish = now_allocations end
idle_time()
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Returns the idle time time (in milliseconds) passed since the call to start!
and the call to finish!
# File lib/active_support/notifications/instrumenter.rb, line 110 def idle_time duration - cpu_time end
parent_of?(event)
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# File lib/active_support/notifications/instrumenter.rb, line 140 def parent_of?(event) @children.include? event end
record() { |payload| ... }
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# File lib/active_support/notifications/instrumenter.rb, line 75 def record start! begin yield payload if block_given? rescue Exception => e payload[:exception] = [e.class.name, e.message] payload[:exception_object] = e raise e ensure finish! end end
start!()
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Record information at the time this event starts
# File lib/active_support/notifications/instrumenter.rb, line 89 def start! @time = now @cpu_time_start = now_cpu @allocation_count_start = now_allocations end
Private Instance Methods
now()
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# File lib/active_support/notifications/instrumenter.rb, line 145 def now Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond) end
now_allocations()
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# File lib/active_support/notifications/instrumenter.rb, line 162 def now_allocations GC.stat(:total_allocated_objects) end
now_cpu()
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# File lib/active_support/notifications/instrumenter.rb, line 152 def now_cpu Process.clock_gettime(Process::CLOCK_THREAD_CPUTIME_ID, :float_millisecond) end