Class: Librato::Rack::ValidatingQueue

Inherits:
Metrics::Queue
  • Object
show all
Defined in:
lib/librato/rack/validating_queue.rb

Overview

Queue with special upfront validating logic, this should probably be available in librato-metrics but spiking here to work out the kinks

Constant Summary collapse

DEFAULT_TAGS_LIMIT = 
4
METRIC_NAME_REGEX = 
/\A[-.:_\w]{1,255}\z/
TAGS_KEY_REGEX = 
/\A[-.:_\w]{1,64}\z/
TAGS_VALUE_REGEX = 
/\A[-.:_\w\s]{1,255}\z/

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/librato/rack/validating_queue.rb', line 13

def logger
  @logger
end

Instance Method Details

#submit ⇒ Object 



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# File 'lib/librato/rack/validating_queue.rb', line 15

def submit
  validate_measurements

  super
end

#validate_measurements ⇒ Object

screen all measurements for validity before sending



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# File 'lib/librato/rack/validating_queue.rb', line 22

def validate_measurements
  @queued[:measurements].delete_if do |entry|
    name = entry[:name].to_s
    tags = entry[:tags]
    if name !~ METRIC_NAME_REGEX
      log :warn, "invalid metric name '#{name}', not sending."
      true # delete
    elsif tags && tags.any? { |k,v| k.to_s !~ TAGS_KEY_REGEX || v.to_s !~ TAGS_VALUE_REGEX }
      log :warn, "halting: '#{tags}' are invalid tags."
      true # delete
    else
      false # preserve
    end
  end
end