Class: Datadog::Metrics

Inherits:
Object
  • Object
show all
Extended by:
Helpers, Options
Includes:
Options
Defined in:
lib/ddtrace/metrics.rb

Overview

Acts as client for sending metrics (via Statsd) Wraps a Statsd client with default tags and additional configuration.

Defined Under Namespace

Modules: Helpers, Logging, Options Classes: Metric

Constant Summary

Constants included from Options

Options::DEFAULT

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Options

default_metric_options, metric_options

Constructor Details

#initialize(options = {}) ⇒ Metrics

Returns a new instance of Metrics.



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# File 'lib/ddtrace/metrics.rb', line 14

def initialize(options = {})
  @statsd = options.fetch(:statsd) { default_statsd_client if supported? }
  @enabled = options.fetch(:enabled, true)
end

Instance Attribute Details

#statsd ⇒ Object (readonly)

Returns the value of attribute statsd.



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# File 'lib/ddtrace/metrics.rb', line 12

def statsd
  @statsd
end

Instance Method Details

#configure(options = {}) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 49

def configure(options = {})
  @statsd = options[:statsd] if options.key?(:statsd)
  self.enabled = options[:enabled] if options.key?(:enabled)
end

#count(stat, value = nil, options = nil, &block) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 58

def count(stat, value = nil, options = nil, &block)
  return unless send_stats? && statsd.respond_to?(:count)
  value, options = yield if block_given?
  raise ArgumentError if value.nil?

  statsd.count(stat, value, metric_options(options))
rescue StandardError => e
  Datadog::Tracer.log.error("Failed to send count stat. Cause: #{e.message} Source: #{e.backtrace.first}")
end

#default_hostname ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 34

def default_hostname
  ENV.fetch(Datadog::Ext::Metrics::ENV_DEFAULT_HOST, Datadog::Ext::Metrics::DEFAULT_HOST)
end

#default_port ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 38

def default_port
  ENV.fetch(Datadog::Ext::Metrics::ENV_DEFAULT_PORT, Datadog::Ext::Metrics::DEFAULT_PORT).to_i
end

#default_statsd_client ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 42

def default_statsd_client
  require 'datadog/statsd' unless defined?(::Datadog::Statsd)

  # Create a StatsD client that points to the agent.
  Datadog::Statsd.new(default_hostname, default_port)
end

#distribution(stat, value = nil, options = nil, &block) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 68

def distribution(stat, value = nil, options = nil, &block)
  return unless send_stats? && statsd.respond_to?(:distribution)
  value, options = yield if block_given?
  raise ArgumentError if value.nil?

  statsd.distribution(stat, value, metric_options(options))
rescue StandardError => e
  Datadog::Tracer.log.error("Failed to send distribution stat. Cause: #{e.message} Source: #{e.backtrace.first}")
end

#enabled=(enabled) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 30

def enabled=(enabled)
  @enabled = (enabled == true)
end

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ddtrace/metrics.rb', line 26

def enabled?
  @enabled
end

#gauge(stat, value = nil, options = nil, &block) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 87

def gauge(stat, value = nil, options = nil, &block)
  return unless send_stats? && statsd.respond_to?(:gauge)
  value, options = yield if block_given?
  raise ArgumentError if value.nil?

  statsd.gauge(stat, value, metric_options(options))
rescue StandardError => e
  Datadog::Tracer.log.error("Failed to send gauge stat. Cause: #{e.message} Source: #{e.backtrace.first}")
end

#increment(stat, options = nil) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 78

def increment(stat, options = nil)
  return unless send_stats? && statsd.respond_to?(:increment)
  options = yield if block_given?

  statsd.increment(stat, metric_options(options))
rescue StandardError => e
  Datadog::Tracer.log.error("Failed to send increment stat. Cause: #{e.message} Source: #{e.backtrace.first}")
end

#send_metrics(metrics) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 114

def send_metrics(metrics)
  metrics.each { |m| send(m.type, *[m.name, m.value, m.options].compact) }
end

#send_stats? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ddtrace/metrics.rb', line 54

def send_stats?
  enabled? && !statsd.nil?
end

#supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ddtrace/metrics.rb', line 19

def supported?
  version = Gem.loaded_specs['dogstatsd-ruby'] \
              && Gem.loaded_specs['dogstatsd-ruby'].version

  !version.nil? && (version >= Gem::Version.new('3.3.0'))
end

#time(stat, options = nil) ⇒ Object 



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# File 'lib/ddtrace/metrics.rb', line 97

def time(stat, options = nil)
  return yield unless send_stats?

  # Calculate time, send it as a distribution.
  start = Utils::Time.get_time
  return yield
ensure
  begin
    if send_stats? && !start.nil?
      finished = Utils::Time.get_time
      distribution(stat, ((finished - start) * 1000), options)
    end
  rescue StandardError => e
    Datadog::Tracer.log.error("Failed to send time stat. Cause: #{e.message} Source: #{e.backtrace.first}")
  end
end