send_test_spans.rb

require 'epsagon'
require 'faraday'
require 'net/http'

BACKEND = 'opentelemetry.tc.epsagon.com:443/traces'

Epsagon.init(metadata_only: false, debug: true, backend: BACKEND, app_name: 'send-test-spans')

# add custom resource tag:
# OpenTelemetry::SDK.configure do |c|
#   c.resource = OpenTelemetry::SDK::Resources::Resource.telemetry_sdk.merge(
#     OpenTelemetry::SDK::Resources::Resource.create({ 'custom_resource_tag' => 'custom_resource_tag_val' })
#   )
# end

pids = {}
pids[:traced_app] = spawn 'ruby traced_sinatra.rb'
pids[:untraced_app] = spawn 'ruby untraced_sinatra.rb'
sleep 3

# "vanilla" spans:
tracer = OpenTelemetry.tracer_provider.tracer('send-test-spans', '0.1.0')


tracer.in_span('nested_outer') do |span|
  span.set_attribute('is_question', true)
  span.set_attribute('answer', 42)
  span.set_attribute('exact', 42.225)
  span.set_attribute('message', 'These pretzels are making me thirsty')
  tracer.in_span('inner') do |child_span|
    child_span.set_attribute('inner_span_attr', 'is awesome')
    tracer.in_span('more_inner') do |grandchild_span|
      grandchild_span.set_attribute('more_inner_span_attr', 'is more awesome')
    end
  end
end

tracer.in_span('test_status_ok') do |span|
  span.status = OpenTelemetry::Trace::Status.new(OpenTelemetry::Trace::Status::OK)
end

tracer.in_span('test_status_error') do |span|
  span.status = OpenTelemetry::Trace::Status.new(OpenTelemetry::Trace::Status::ERROR)
end

begin
	tracer.in_span('with_exception') do |span|
	  raise RuntimeError.new("This is the error message")
	end
rescue RuntimeError
	#raised and ignored for span creation
end

#Faraday:
url = 'http://localhost:4566/some/path/index.html;pathparam=who,even,uses,this?q1=a&q2=b&q1=c'
Faraday.post(url, 'yanti=parazi')

#Faraday with error:
Faraday.get('http://localhost:4566/does-not-exist')

#Faraday with server error:
Faraday.get('http://localhost:4566/make-error')

# Sinatra (on server process) with error
`curl -X POST http://localhost:4567/foo/bar -d "amir=asdasd"`

# Sinatra (on server process) with error
`curl http://localhost:4567/asdasd`

# Sinatra (on server process) server error:
`curl http://localhost:4567/make-error`



Process.kill('SIGHUP', pids[:traced_app])
Process.detach(pids[:traced_app])
Process.kill('SIGHUP', pids[:untraced_app])
Process.detach(pids[:untraced_app])