Class: OpenTracing::Instrumentation::Rack::TraceMiddleware

Inherits:
Object
  • Object
show all
Defined in:
lib/opentracing/instrumentation/rack/trace_middleware.rb

Overview

TraceMiddleware observer rack requests.

Constant Summary collapse

DEFAULT_COMMAND_NAME_BUILDER = 
StaticCommandNameBuilder.new

Instance Method Summary collapse

Constructor Details

#initialize(app, logger: nil, command_name_builder: DEFAULT_COMMAND_NAME_BUILDER, http_tagger: HttpTagger.new, tracer: OpenTracing.global_tracer) ⇒ TraceMiddleware

Returns a new instance of TraceMiddleware.



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# File 'lib/opentracing/instrumentation/rack/trace_middleware.rb', line 12

def initialize(
  app,
  logger: nil,
  command_name_builder: DEFAULT_COMMAND_NAME_BUILDER,
  http_tagger: HttpTagger.new,
  tracer: OpenTracing.global_tracer
)
  @app = app
  @logger = logger
  @command_name_builder = command_name_builder
  @http_tagger = http_tagger
  @tracer = tracer
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/opentracing/instrumentation/rack/trace_middleware.rb', line 26

def call(env)
  trace_request(env) do |span|
    catch_error(span) do
      status, headers, body = app.call(env)

      set_response_tags(span, status, headers)
      [status, headers, body]
    end
  end
end