Class: God::Metric

Inherits:
Object
  • Object
show all
Defined in:
lib/god/metric.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(watch, destination = nil) ⇒ Metric

Returns a new instance of Metric.



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# File 'lib/god/metric.rb', line 6

def initialize(watch, destination = nil)
  self.watch = watch
  self.destination = destination
  self.conditions = []
end

Instance Attribute Details

#conditions ⇒ Object

Returns the value of attribute conditions.



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# File 'lib/god/metric.rb', line 4

def conditions
  @conditions
end

#destination ⇒ Object

Returns the value of attribute destination.



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# File 'lib/god/metric.rb', line 4

def destination
  @destination
end

#watch ⇒ Object

Returns the value of attribute watch.



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# File 'lib/god/metric.rb', line 4

def watch
  @watch
end

Instance Method Details

#condition(kind) {|c| ... } ⇒ Object

Instantiate a Condition of type kind and pass it into the optional block. Attributes of the condition must be set in the config file

Yields:

  • (c) 


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# File 'lib/god/metric.rb', line 14

def condition(kind)
  # create the condition
  begin
    c = Condition.generate(kind, self.watch)
  rescue NoSuchConditionError => e
    abort e.message
  end
  
  # send to block so config can set attributes
  yield(c) if block_given?
  
  # call prepare on the condition
  c.prepare
  
  # test generic and specific validity
  unless Condition.valid?(c) && c.valid?
    abort "Exiting on invalid condition"
  end
  
  # inherit interval from watch if no poll condition specific interval was set
  if c.kind_of?(PollCondition) && !c.interval
    if self.watch.interval
      c.interval = self.watch.interval
    else
      abort "No interval set for Condition '#{c.class.name}' in Watch '#{self.watch.name}', and no default Watch interval from which to inherit"
    end
  end
  
  # remember
  self.conditions << c
end

#disable ⇒ Object 



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# File 'lib/god/metric.rb', line 52

def disable
  self.conditions.each do |c|
    self.watch.detach(c)
  end
end

#enable ⇒ Object 



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# File 'lib/god/metric.rb', line 46

def enable
  self.conditions.each do |c|
    self.watch.attach(c)
  end
end