Module: Datadog::Tracing::Contrib::Rails::Runner::InstrumentedKernel

Defined in:
lib/datadog/tracing/contrib/rails/runner.rb

Overview

Instruments the ‘Kernel.load` method, but only for the `Rails::Command::RunnerCommand` class.

Class Method Summary collapse

Class Method Details

.load(*args) ⇒ Object 



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# File 'lib/datadog/tracing/contrib/rails/runner.rb', line 79

def self.load(*args)
  file = args[0]
  name = Ext::SPAN_RUNNER_FILE
  resource = file
  operation = Ext::TAG_OPERATION_FILE

  begin
    # Reads one more byte than the limit to allow us to check if the source exceeds the limit.
    source = File.read(file, MAX_TAG_VALUE_SIZE + 1)
  rescue => e
    Datadog.logger.debug("Failed to read file '#{file}' for Rails runner: #{e.message}")
  end

  Tracing.trace(
    name,
    service: Datadog.configuration.tracing[:rails][:service_name],
    resource: resource,
    tags: {
      Tracing::Metadata::Ext::TAG_COMPONENT => Ext::TAG_COMPONENT,
      Tracing::Metadata::Ext::TAG_OPERATION => operation,
    }
  ) do |span|
    if source
      span.set_tag(
        Ext::TAG_RUNNER_SOURCE,
        Core::Utils.truncate(source, MAX_TAG_VALUE_SIZE)
      )
    end
    Contrib::Analytics.set_rate!(span, Datadog.configuration.tracing[:rails])

    super
  end
end