Grape::Instrumentation

This gem provides OpenTracing instrumentation for Grape by hooking into ActiveSupport notifications.

The following events are instrumented:

• endpoint_run.grape
• endpoint_run_filters.grape
• endpoint_run_validators.grape
• endpoint_render.grape
• format_response.grape

Add this line to your application's Gemfile:

gem 'signalfx-grape-instrumentation'

And then execute:

$ bundle

Or install it yourself as:

$ gem install signalfx-grape-instrumentation

require `grape/instrumentation`

Grape::Instrumentation.instrument(tracer: OpenTracing.global_tracer, parent_span: ->(payload) { some_parent_span })

Grape::Instrumentation.instrument optionally takes these arguments:

• tracer: OpenTracing tracer to be used for this instrumentation.
  • Default: OpenTracing.global_tracer
• parent_span: this can be a parent span, or a block that takes an argument, payload, which is the notification event payload, and returns the that should be used as the parent span.
  • Example: ->(payload) { ::Grape::Instrumentation.tracer.active_span }
  • Default: nil

The tracer is made available through Grape::Instrumentation.tracer.

This instrumentation can be used in conjunction with Rack::Tracer to group spans by request.

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/signalfx/ruby-grape-instrumentation.