Module: OpenTelemetry::Instrumentation::Rack

Extended by:
Rack
Included in:
Rack
Defined in:
lib/opentelemetry/instrumentation/rack.rb,
lib/opentelemetry/instrumentation/rack/util.rb,
lib/opentelemetry/instrumentation/rack/version.rb,
lib/opentelemetry/instrumentation/rack/instrumentation.rb,
lib/opentelemetry/instrumentation/rack/util/queue_time.rb,
lib/opentelemetry/instrumentation/rack/middlewares/event_handler.rb,
lib/opentelemetry/instrumentation/rack/middlewares/tracer_middleware.rb

Overview

Contains the OpenTelemetry instrumentation for the Rack gem

Defined Under Namespace

Modules: Middlewares, Util Classes: Instrumentation

Constant Summary collapse

VERSION = 
'0.23.4'

Instance Method Summary collapse

Instance Method Details

#context_with_span(span, parent_context: Context.current) ⇒ Object

Returns a context containing the span, derived from the optional parent context, or the current context if one was not provided.

Parameters:

  • context (optional Context) —

    The context to use as the parent for the returned context



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# File 'lib/opentelemetry/instrumentation/rack.rb', line 33

def context_with_span(span, parent_context: Context.current)
  parent_context.set_value(CURRENT_SPAN_KEY, span)
end

#current_span(context = nil) ⇒ Object

Returns the current span from the current or provided context

Parameters:

  • context (optional Context) (defaults to: nil) —

    The context to lookup the current Span from. Defaults to Context.current



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# File 'lib/opentelemetry/instrumentation/rack.rb', line 23

def current_span(context = nil)
  context ||= Context.current
  context.value(CURRENT_SPAN_KEY) || OpenTelemetry::Trace::Span::INVALID
end

#with_span(span) {|span, context| ... } ⇒ Object

Activates/deactivates the Span within the current Context, which makes the "current span" available implicitly.

On exit, the Span that was active before calling this method will be reactivated.

Parameters:

  • span (Span) —

    the span to activate

Yields:

  • (span, context) —

    yields span and a context containing the span to the block.



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# File 'lib/opentelemetry/instrumentation/rack.rb', line 44

def with_span(span)
  Context.with_value(CURRENT_SPAN_KEY, span) { |c, s| yield s, c }
end