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Getting started with Rack

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Getting started with Rack

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Add the gem to your Gemfile:

gem 'elastic-apm'

Create a file config/elastic_apm.yml:

server_url: http://localhost:8100
secret_token: ''

Include the middleware, start (and stop) Elastic APM when booting your app:

# config.ru

app = lambda do |env|
  [200, {'Content-Type' => 'text/plain'}, ['ok']]
end

# Wraps all requests in transactions and reports exceptions
use ElasticAPM::Middleware

# Start an instance of the Agent
ElasticAPM.start(service_name: 'NothingButRack')

run app

# Gracefully stop the agent when process exits.
# Makes sure any pending transactions are sent.
at_exit { ElasticAPM.stop }

Sinatra example

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# Example config.ru

require 'sinatra/base'

class MySinatraApp < Sinatra::Base
  use ElasticAPM::Middleware

  # ...
end

# Takes optional ElasticAPM::Config values
ElasticAPM.start(app: MySinatraApp, ...)

run MySinatraApp

at_exit { ElasticAPM.stop }
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