Class: SemanticLogger::Metric::Statsd

Inherits:
Subscriber show all
Defined in:
lib/semantic_logger/metric/statsd.rb

Instance Attribute Summary collapse

Attributes inherited from Subscriber

#application, #environment, #formatter, #host, #logger, #metrics

Attributes inherited from Base

#filter, #name

Instance Method Summary collapse

Methods inherited from Subscriber

#close, #console_output?, #default_formatter, #flush, #level

Methods inherited from Base

#backtrace, #fast_tag, #level, #level=, #measure, #named_tags, #pop_tags, #push_tags, #silence, #tagged, #tags

Constructor Details

#initialize(url: "udp://localhost:8125") ⇒ Statsd

Create Statsd metrics subscriber

Parameters:

url: [String]
  Valid URL to post to.
  Example:
    udp://localhost:8125
  Example, send all metrics to a particular namespace:
    udp://localhost:8125/namespace
  Default: udp://localhost:8125

Example:

SemanticLogger.add_appender(
  metric: :statsd,
  url:    'localhost:8125'
)



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# File 'lib/semantic_logger/metric/statsd.rb', line 29

def initialize(url: "udp://localhost:8125")
  @url = url
  super()
end

Instance Attribute Details

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/semantic_logger/metric/statsd.rb', line 11

def url
  @url
end

Instance Method Details

#log(log) ⇒ Object 



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# File 'lib/semantic_logger/metric/statsd.rb', line 43

def log(log)
  metric = log.metric
  if (duration = log.duration)
    @statsd.timing(metric, duration)
  else
    amount = (log.metric_amount || 1).round
    if amount.negative?
      amount.times { @statsd.decrement(metric) }
    else
      amount.times { @statsd.increment(metric) }
    end
  end
end

#reopen ⇒ Object 



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# File 'lib/semantic_logger/metric/statsd.rb', line 34

def reopen
  uri = URI.parse(@url)
  raise('Statsd only supports udp. Example: "udp://localhost:8125"') if uri.scheme != "udp"

  @statsd           = ::Statsd.new(uri.host, uri.port)
  path              = uri.path.chomp("/")
  @statsd.namespace = path.sub("/", "") if path != ""
end

#should_log?(log) ⇒ Boolean

Only forward log entries that contain metrics.

Returns:

  • (Boolean) 


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# File 'lib/semantic_logger/metric/statsd.rb', line 58

def should_log?(log)
  # Does not support metrics with dimensions.
  log.metric && !log.dimensions && meets_log_level?(log) && !filtered?(log)
end