Class: Tobox::Plugins::Datadog::EventHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/tobox/plugins/datadog.rb

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ EventHandler 



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# File 'lib/tobox/plugins/datadog.rb', line 11

def initialize(config)
  @config = config
  @db_table = @config[:table]
end

Instance Method Details

#on_error(event, error) ⇒ Object 



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# File 'lib/tobox/plugins/datadog.rb', line 76

def on_error(event, error)
  span = event[:__tobox_event_span]

  return unless span

  span.set_error(error)
  span.finish
end

#on_finish(event) ⇒ Object 



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# File 'lib/tobox/plugins/datadog.rb', line 68

def on_finish(event)
  span = event[:__tobox_event_span]

  return unless span

  span.finish
end

#on_start(event) ⇒ Object 



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# File 'lib/tobox/plugins/datadog.rb', line 16

def on_start(event)
  datadog_config = ::Datadog.configuration.tracing[:tobox]
  service = datadog_config[:service_name]
  error_handler = datadog_config[:error_handler]

  analytics_enabled = datadog_config[:analytics_enabled]
  analytics_sample_rate = datadog_config[:analytics_sample_rate]
  distributed_tracing = datadog_config[:distributed_tracing]

  resource = event[:type]

  if (metadata = event[:metadata])
    previous_span = metadata["datadog-parent-id"]

    if distributed_tracing && previous_span
      trace_digest = ::Datadog::Tracing::TraceDigest.new(
        span_id: previous_span,
        trace_id: event[:metadata]["datadog-trace-id"],
        trace_sampling_priority: event[:metadata]["datadog-sampling-priority"],
        trace_origin: event[:metadata]["datadog-origin"]
      )
      ::Datadog::Tracing.continue_trace!(trace_digest)
    end
  end

  span = ::Datadog::Tracing.trace(
    "tobox.event",
    service: service,
    span_type: ::Datadog::Tracing::Metadata::Ext::AppTypes::TYPE_WORKER,
    on_error: error_handler
  )
  span.resource = resource

  span.set_tag(::Datadog::Tracing::Metadata::Ext::TAG_COMPONENT, "tobox")
  span.set_tag(::Datadog::Tracing::Metadata::Ext::TAG_OPERATION, "event")

  if ::Datadog::Tracing::Contrib::Analytics.enabled?(analytics_enabled)
    ::Datadog::Tracing::Contrib::Analytics.set_sample_rate(span, analytics_sample_rate)
  end

  # Measure service stats
  ::Datadog::Tracing::Contrib::Analytics.set_measured(span)

  span.set_tag("tobox.event.id", event[:id])
  span.set_tag("tobox.event.type", event[:type])
  span.set_tag("tobox.event.retry", event[:attempts])
  span.set_tag("tobox.event.table", @db_table)
  span.set_tag("tobox.event.delay", (Time.now.utc - event[:created_at]).to_f)

  event[:__tobox_event_span] = span
end