Class: ScoutApm::SlowPolicy::AgePolicy

Inherits:
Policy
  • Object
show all
Defined in:
lib/scout_apm/slow_policy/age_policy.rb

Constant Summary collapse

POINT_MULTIPLIER_AGE =

For each minute we haven’t seen an endpoint

0.25

Instance Attribute Summary collapse

Attributes inherited from Policy

#context

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ AgePolicy

Returns a new instance of AgePolicy.



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# File 'lib/scout_apm/slow_policy/age_policy.rb', line 15

def initialize(context)
  super

  zero_time = Time.now
  @last_seen = Hash.new { |h, k| h[k] = zero_time }
end

Instance Attribute Details

#last_seen ⇒ Object (readonly)

A hash of Endpoint Name to the last time we stored a slow transaction for it.

Defaults to a start time that is pretty close to application boot time. So the “age” of an endpoint we’ve never seen is the time the application has been running.



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# File 'lib/scout_apm/slow_policy/age_policy.rb', line 13

def last_seen
  @last_seen
end

Instance Method Details

#call(request) ⇒ Object 



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# File 'lib/scout_apm/slow_policy/age_policy.rb', line 22

def call(request)
  # How long has it been since we've seen this?
  age = Time.now - last_seen[request.unique_name]

  age / 60.0 * POINT_MULTIPLIER_AGE
end

#stored!(request) ⇒ Object 



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# File 'lib/scout_apm/slow_policy/age_policy.rb', line 29

def stored!(request)
  last_seen[request.unique_name] = Time.now
end