Module: Datadog::Contrib::Dalli::Instrumentation

Defined in:
lib/ddtrace/contrib/dalli/instrumentation.rb

Overview

Instruments every interaction with the memcached server

Class Method Summary collapse

Class Method Details

.patch! ⇒ Object 



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# File 'lib/ddtrace/contrib/dalli/instrumentation.rb', line 11

def patch!
  ::Dalli::Server.class_eval do
    alias_method :__request, :request

    def request(op, *args)
      pin = Datadog::Pin.get_from(::Dalli)

      pin.tracer.trace(Datadog::Contrib::Dalli::NAME) do |span|
        span.resource = op.to_s.upcase
        span.service = pin.service
        span.span_type = pin.app_type
        span.set_tag(Datadog::Ext::NET::TARGET_HOST, hostname)
        span.set_tag(Datadog::Ext::NET::TARGET_PORT, port)
        cmd = Datadog::Contrib::Dalli::Quantize.format_command(op, args)
        span.set_tag(Datadog::Contrib::Dalli::CMD_TAG, cmd)

        __request(op, *args)
      end
    end
  end
end