Class: OkComputer::SizeThresholdCheck

Inherits:
Check
  • Object
show all
Defined in:
lib/ok_computer/built_in_checks/size_threshold_check.rb

Constant Summary

Constants inherited from Check

Check::CheckNotDefined

Instance Attribute Summary collapse

Attributes inherited from Check

#failure_occurred, #message, #registrant_name, #time

Instance Method Summary collapse

Methods inherited from Check

#<=>, #clear, #mark_failure, #mark_message, #run, #success?, #to_json, #to_text, #with_benchmarking

Constructor Details

#initialize(name, threshold, &size_proc) ⇒ SizeThresholdCheck

Public: Initialize a check for a backed-up Resque queue

name - the value that this check should be refered to as threshold - An Integer to compare the size object’s count against to consider

it backed up

size_proc - The block/proc that returns an integer to compare against

Examples

SizeThresholdCheck.new("some queue", 2) do
  Queue.new("my_queue").size
end



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 20

def initialize(name, threshold, &size_proc)
  self.size_proc = size_proc
  self.threshold = Integer(threshold)
  self.name = name
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 5

def name
  @name
end

#size_proc ⇒ Object

Returns the value of attribute size_proc.



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 3

def size_proc
  @size_proc
end

#threshold ⇒ Object

Returns the value of attribute threshold.



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 4

def threshold
  @threshold
end

Instance Method Details

#check ⇒ Object

Public: Check whether the given queue is backed up



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 27

def check
  # Memoize size here to prevent a theoretically
  # expensive operation from happening more than once
  size = self.size
  if size <= threshold
    mark_message "#{name} at reasonable level (#{size})"
  else
    mark_failure
    mark_message "#{name} is #{size - threshold} over threshold! (#{size})"
  end
rescue ArgumentError, TypeError => e
  mark_failure
  mark_message "The given proc MUST return a number (#{e.class})"
rescue StandardError => e
  mark_failure
  mark_message "An error occurred: '#{e.message}' (#{e.class})"
end

#size ⇒ Object

Public: The number of jobs in the check’s queue



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# File 'lib/ok_computer/built_in_checks/size_threshold_check.rb', line 46

def size
  Integer(size_proc.call)
end