Datadog::Tracing.trace(name, **options) do |span, trace|
  # Wrap this block around the code you want to instrument
  # Additionally, you can modify the span here.
  # e.g. Change the resource name, set tags, etc...
end

get '/posts' do
  Datadog::Tracing.trace('web.request', service: 'my-blog', resource: 'GET /posts') do |span|
    # Trace the activerecord call
    Datadog::Tracing.trace('posts.fetch') do
      @posts = Posts.order(created_at: :desc).limit(10)
    end

    # Add some APM tags
    span.set_tag('http.method', request.request_method)
    span.set_tag('posts.count', @posts.length)

    # Trace the template rendering
    Datadog::Tracing.trace('template.render') do
      erb :index
    end
  end
end

# Some instrumentation framework calls this after an event finishes...
def db_query(start, finish, query)
  span = Datadog::Tracing.trace('database.query', start_time: start)
  span.resource = query
  span.finish(finish)
end

# e.g. ActiveSupport::Notifications calls this when an event starts
def start(name, id, payload)
  # Start a span
  Datadog::Tracing.trace(name)
end

# e.g. ActiveSupport::Notifications calls this when an event finishes
def finish(name, id, payload)
  # Retrieve current active span (thread-safe)
  current_span = Datadog::Tracing.active_span
  unless current_span.nil?
    current_span.resource = payload[:query]
    current_span.finish
  end
end

# e.g. adding tag to active span

current_span = Datadog::Tracing.active_span
current_span.set_tag('my_tag', 'my_value') unless current_span.nil?

# e.g. accessing active trace

current_trace = Datadog::Tracing.active_trace

Datadog.configure do |c|
  # Activates and configures an integration
  c.tracing.instrument :integration_name, **options
end

Datadog.configure do |c|
  # Activates and configures an integration
  c.ci.instrument :integration_name, **options
end

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :action_cable
end

require 'ddtrace'
Datadog.configure do |c|
  c.tracing.instrument :action_mailer, **options
end

require 'actionpack'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :action_pack
end

require 'actionview'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :action_view, **options
end

require 'active_job'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :active_job
end

ExampleJob.perform_later

require 'active_model_serializers'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :active_model_serializers
end

my_object = MyModel.new(name: 'my object')
ActiveModelSerializers::SerializableResource.new(test_obj).serializable_hash

require 'tmpdir'
require 'sqlite3'
require 'active_record'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :active_record, **options
end

Dir::Tmpname.create(['test', '.sqlite']) do |db|
  conn = ActiveRecord::Base.establish_connection(adapter: 'sqlite3',
                                                 database: db)
  conn.connection.execute('SELECT 42') # traced!
end

# Provide a `:describes` option with a connection key.
# Any of the following keys are acceptable and equivalent to one another.
# If a block is provided, it yields a Settings object that
# accepts any of the configuration options listed above.

Datadog.configure do |c|
  # Symbol matching your database connection in config/database.yml
  # Only available if you are using Rails with ActiveRecord.
  c.tracing.instrument :active_record, describes: :secondary_database, service_name: 'secondary-db'

  # Block configuration pattern.
  c.tracing.instrument :active_record, describes: :secondary_database do |second_db|
    second_db.service_name = 'secondary-db'
  end

  # Connection string with the following connection settings:
  # adapter, username, host, port, database
  # Other fields are ignored.
  c.tracing.instrument :active_record, describes: 'mysql2://root@127.0.0.1:3306/mysql', service_name: 'secondary-db'

  # Hash with following connection settings:
  # adapter, username, host, port, database
  # Other fields are ignored.
  c.tracing.instrument :active_record, describes: {
      adapter:  'mysql2',
      host:     '127.0.0.1',
      port:     '3306',
      database: 'mysql',
      username: 'root'
    },
    service_name: 'secondary-db'

  # If using the `makara` gem, it's possible to match on connection `role`:
  c.tracing.instrument :active_record, describes: { makara_role: 'primary' }, service_name: 'primary-db'
  c.tracing.instrument :active_record, describes: { makara_role: 'replica' }, service_name: 'secondary-db'
end

Datadog.configure do |c|
  # Matches any connection on host `127.0.0.1`.
  c.tracing.instrument :active_record, describes: { host:  '127.0.0.1' }, service_name: 'local-db'

  # Matches any `mysql2` connection.
  c.tracing.instrument :active_record, describes: { adapter: 'mysql2'}, service_name: 'mysql-db'

  # Matches any `mysql2` connection to the `reports` database.
  #
  # In case of multiple matching `describe` configurations, the latest one applies.
  # In this case a connection with both adapter `mysql` and database `reports`
  # will be configured `service_name: 'reports-db'`, not `service_name: 'mysql-db'`.
  c.tracing.instrument :active_record, describes: { adapter: 'mysql2', database:  'reports'}, service_name: 'reports-db'
end

require 'activesupport'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :active_support, **options
end

cache = ActiveSupport::Cache::MemoryStore.new
cache.read('city')

require 'aws-sdk'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :aws, **options
end

# Perform traced call
Aws::S3::Client.new.list_buckets

# Inside Rails initializer or equivalent
Datadog.configure do |c|
  # Patches ::Concurrent::Future to use ExecutorService that propagates context
  c.tracing.instrument :concurrent_ruby
end

# Pass context into code executed within Concurrent::Future
Datadog::Tracing.trace('outer') do
  Concurrent::Future.execute { Datadog::Tracing.trace('inner') { } }.wait
end

# Pass context into code executed within Concurrent::Async
class MyClass
  include ConcurrentAsync

  def foo
    Datadog::Tracing.trace('inner') { }
  end
end

Datadog::Tracing.trace('outer') do
  MyClass.new.async.foo
end

require 'cucumber'
require 'ddtrace'

# Configure default Cucumber integration
Datadog.configure do |c|
  c.ci.instrument :cucumber, **options
end

# Example of how to attach tags from scenario to active span
Around do |scenario, block|
  active_span = Datadog.configuration[:cucumber][:tracer].active_span
  unless active_span.nil?
    scenario.tags.filter { |tag| tag.include? ':' }.each do |tag|
      active_span.set_tag(*tag.name.split(':', 2))
    end
  end
  block.call
end

require 'dalli'
require 'ddtrace'

# Configure default Dalli tracing behavior
Datadog.configure do |c|
  c.tracing.instrument :dalli, **options
end

# Configure Dalli tracing behavior for single client
client = Dalli::Client.new('localhost:11211', **options)
client.set('abc', 123)

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :delayed_job, **options
end

require 'elasticsearch/transport'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :elasticsearch, **options
end

# Perform a query to Elasticsearch
client = Elasticsearch::Client.new url: 'http://127.0.0.1:9200'
response = client.perform_request 'GET', '_cluster/health'

# In case you want to override the global configuration for a certain client instance
Datadog.configure_onto(client.transport, **options)

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :ethon, **options

  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :ethon, describes: /user-[^.]+\.example\.com/ do |ethon|
    ethon.service_name = 'user.example.com'
    ethon.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

require 'excon'
require 'ddtrace'

# Configure default Excon tracing behavior
Datadog.configure do |c|
  c.tracing.instrument :excon, **options

  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :excon, describes: /user-[^.]+\.example\.com/ do |excon|
    excon.service_name = 'user.example.com'
    excon.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

connection = Excon.new('https://example.com')
connection.get

# Wrap the Datadog tracing middleware around the default middleware stack
Excon.new(
  'http://example.com',
  middlewares: Datadog::Tracing::Contrib::Excon::Middleware.with(options).around_default_stack
)

# Insert the middleware into a custom middleware stack.
# NOTE: Trace middleware must be inserted after ResponseParser!
Excon.new(
  'http://example.com',
  middlewares: [
    Excon::Middleware::ResponseParser,
    Datadog::Tracing::Contrib::Excon::Middleware.with(options),
    Excon::Middleware::Idempotent
  ]
)

require 'faraday'
require 'ddtrace'

# Configure default Faraday tracing behavior
Datadog.configure do |c|
  c.tracing.instrument :faraday, **options

  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :faraday, describes: /user-[^.]+\.example\.com/ do |faraday|
    faraday.service_name = 'user.example.com'
    faraday.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

# In case you want to override the global configuration for a certain client instance
connection = Faraday.new('https://example.com') do |builder|
  builder.use(:ddtrace, **options)
  builder.adapter Faraday.default_adapter
end

connection.get('/foo')

# api.rb
require 'grape'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :grape, **options
end

# Then define your application
class RackTestingAPI < Grape::API
  desc 'main endpoint'
  get :success do
    'Hello world!'
  end
end

# Inside Rails initializer or equivalent
Datadog.configure do |c|
  c.tracing.instrument :graphql, schemas: [YourSchema], **options
end

# Then run a GraphQL query
YourSchema.execute(query, variables: {}, context: {}, operation_name: nil)

# Class-based schema
class YourSchema < GraphQL::Schema
  use(
    GraphQL::Tracing::DataDogTracing,
    service: 'graphql'
  )
end

# .define-style schema
YourSchema = GraphQL::Schema.define do
  use(
    GraphQL::Tracing::DataDogTracing,
    service: 'graphql'
  )
end

# Class-based schema
YourSchema.use(
    GraphQL::Tracing::DataDogTracing,
    service: 'graphql'
)

# .define-style schema
YourSchema.define do
  use(
    GraphQL::Tracing::DataDogTracing,
    service: 'graphql'
  )
end

require 'grpc'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :grpc, **options
end

# Server side
server = GRPC::RpcServer.new
server.add_http2_port('localhost:50051', :this_port_is_insecure)
server.handle(Demo)
server.run_till_terminated

# Client side
client = Demo.rpc_stub_class.new('localhost:50051', :this_channel_is_insecure)
client.my_endpoint(DemoMessage.new(contents: 'hello!'))

configured_interceptor = Datadog::Tracing::Contrib::GRPC::DatadogInterceptor::Client.new do |c|
  c.service_name = "Alternate"
end

alternate_client = Demo::Echo::Service.rpc_stub_class.new(
  'localhost:50052',
  :this_channel_is_insecure,
  :interceptors => [configured_interceptor]
)

gem 'ddtrace', require: 'ddtrace/auto_instrument'

# config/initializers/datadog.rb
Datadog.configure do |c|
  c.tracing.instrument :hanami, **options
end

require 'http'
require 'ddtrace'
Datadog.configure do |c|
  c.tracing.instrument :httprb, **options
  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :httprb, describes: /user-[^.]+\.example\.com/ do |httprb|
    httprb.service_name = 'user.example.com'
    httprb.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

require 'httpclient'
require 'ddtrace'
Datadog.configure do |c|
  c.tracing.instrument :httpclient, **options
  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :httpclient, describes: /user-[^.]+\.example\.com/ do |httpclient|
    httpclient.service_name = 'user.example.com'
    httpclient.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

require "ddtrace"
require "httpx/adapters/datadog"

Datadog.configure do |c|
  c.tracing.instrument :httpx

  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :httpx, describes: /user-[^.]+\.example\.com/ do |http|
    http.service_name = 'user.example.com'
    http.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

require 'active_support/notifications' # required to enable 'ruby-kafka' instrumentation
require 'kafka'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :kafka
end

require 'minitest'
require 'ddtrace'

# Configure default Minitest integration
Datadog.configure do |c|
  c.ci.instrument :minitest, **options
end

require 'mongo'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :mongo, **options
end

# Create a MongoDB client and use it as usual
client = Mongo::Client.new([ '127.0.0.1:27017' ], :database => 'artists')
collection = client[:people]
collection.insert_one({ name: 'Steve' })

# In case you want to override the global configuration for a certain client instance
Datadog.configure_onto(client, **options)

# Provide a `:describes` option with a connection key.
# Any of the following keys are acceptable and equivalent to one another.
# If a block is provided, it yields a Settings object that
# accepts any of the configuration options listed above.

Datadog.configure do |c|
  # Network connection string
  c.tracing.instrument :mongo, describes: '127.0.0.1:27017', service_name: 'mongo-primary'

  # Network connection regular expression
  c.tracing.instrument :mongo, describes: /localhost.*/, service_name: 'mongo-secondary'
end

client = Mongo::Client.new([ '127.0.0.1:27017' ], :database => 'artists')
collection = client[:people]
collection.insert_one({ name: 'Steve' })
# Traced call will belong to `mongo-primary` service

client = Mongo::Client.new([ 'localhost:27017' ], :database => 'artists')
collection = client[:people]
collection.insert_one({ name: 'Steve' })
# Traced call will belong to `mongo-secondary` service

require 'mysql2'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :mysql2, **options
end

client = Mysql2::Client.new(:host => "localhost", :username => "root")
client.query("SELECT * FROM users WHERE group='x'")

require 'net/http'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :http, **options

  # optionally, specify a different service name for hostnames matching a regex
  c.tracing.instrument :http, describes: /user-[^.]+\.example\.com/ do |http|
    http.service_name = 'user.example.com'
    http.split_by_domain = false # Only necessary if split_by_domain is true by default
  end
end

Net::HTTP.start('127.0.0.1', 8080) do |http|
  request = Net::HTTP::Get.new '/index'
  response = http.request(request)
end

content = Net::HTTP.get(URI('http://127.0.0.1/index.html'))

client = Net::HTTP.new(host, port)
Datadog.configure_onto(client, **options)

require 'opensearch'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :opensearch, **options
end

# Perform a query to OpenSearch
client = OpenSearch::Client.new(
  host: 'https://localhost:9200',
  user: 'user',
  password: 'password',
)
client.cluster.health

require 'pg'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :pg, **options
end

require 'presto-client'
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :presto, **options
end

client = Presto::Client.new(
  server: "localhost:8880",
  ssl: {verify: false},
  catalog: "native",
  schema: "default",
  time_zone: "US/Pacific",
  language: "English",
  http_debug: true,
)

client.run("select * from system.nodes")

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :qless, **options
end

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :que, **options
end

require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :racecar, **options
end

# config.ru example
require 'ddtrace'

Datadog.configure do |c|
  c.tracing.instrument :rack, **options
end

use Datadog::Tracing::Contrib::Rack::TraceMiddleware

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

run app