Class: Datadog::Tracing::SpanOperation::Events::OnError

Inherits:
Object
  • Object
show all
Defined in:
lib/datadog/tracing/span_operation.rb

Overview

Triggered when the span raises an error during measurement.

Instance Method Summary collapse

Constructor Details

#initialize(default) ⇒ OnError

Returns a new instance of OnError.



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# File 'lib/datadog/tracing/span_operation.rb', line 380

def initialize(default)
  @handler = default
end

Instance Method Details

#publish(*args) ⇒ Object 



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# File 'lib/datadog/tracing/span_operation.rb', line 407

def publish(*args)
  begin
    @handler.call(*args)
  rescue StandardError => e
    Datadog.logger.debug do
      "Error in on_error handler '#{@default}': #{e.class.name} #{e.message} at #{Array(e.backtrace).first}"
    end
  end

  true
end

#wrap_default ⇒ Object

DEV: Revisit this before full 1.0 release. It seems like OnError wants to behave like a middleware stack, where each “subscriber”‘s executed is chained to the previous one. This is different from how Event works, and might be incompatible.



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# File 'lib/datadog/tracing/span_operation.rb', line 390

def wrap_default
  original = @handler

  @handler = proc do |op, error|
    begin
      yield(op, error)
    rescue StandardError => e
      Datadog.logger.debug do
        "Custom on_error handler #{@handler} failed, using fallback behavior. \
        Cause: #{e.class.name} #{e.message} Location: #{Array(e.backtrace).first}"
      end

      original.call(op, error) if original
    end
  end
end