From bc4f8296f8ffa44f975adc0c157ef2553bee79de Mon Sep 17 00:00:00 2001
From: Jane Sandberg <js7389@princeton.edu>
Date: Thu, 14 Sep 2023 09:22:54 -0700
Subject: [PATCH] Add datadog gems and configuration

Taken from the pdc_describe configuration
---
 Gemfile                        |  2 ++
 Gemfile.lock                   | 18 ++++++++++++++++
 config/initializers/datadog.rb | 39 ++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 config/initializers/datadog.rb

diff --git a/Gemfile b/Gemfile
index 3cad864..713d157 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,8 @@ gem 'activemodel'
 gem 'activerecord'
 gem 'activesupport'
 gem 'bootsnap', require: false
+gem 'ddtrace', require: 'ddtrace/auto_instrument'
+gem 'dogstatsd-ruby'
 gem 'pg'
 gem 'puma', '~> 5.0'
 gem 'railties'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2acb70e..83b0d44 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,14 +37,30 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
+    ddtrace (1.14.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 3.0.0.1.0)
+      libddwaf (~> 1.9.0.0.0)
+      msgpack
+    debase-ruby_core_source (3.2.1)
     diff-lcs (1.5.0)
+    dogstatsd-ruby (5.6.1)
     erubi (1.12.0)
+    ffi (1.15.5)
     hashdiff (1.0.1)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     json (2.6.3)
     kwalify (0.7.2)
     language_server-protocol (3.17.0.3)
+    libdatadog (3.0.0.1.0)
+    libdatadog (3.0.0.1.0-x86_64-linux)
+    libddwaf (1.9.0.0.1-arm64-darwin)
+      ffi (~> 1.0)
+    libddwaf (1.9.0.0.1-x86_64-darwin)
+      ffi (~> 1.0)
+    libddwaf (1.9.0.0.1-x86_64-linux)
+      ffi (~> 1.0)
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -166,6 +182,8 @@ DEPENDENCIES
   activerecord
   activesupport
   bootsnap
+  ddtrace
+  dogstatsd-ruby
   pg
   pry-byebug
   puma (~> 5.0)
diff --git a/config/initializers/datadog.rb b/config/initializers/datadog.rb
new file mode 100644
index 0000000..68e70c0
--- /dev/null
+++ b/config/initializers/datadog.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'datadog/statsd'
+require 'ddtrace'
+
+Datadog.configure do |c|
+  c.env = Rails.env
+  c.service = 'allsearch-backend'
+  c.tracing.report_hostname = true
+  c.tracing.analytics.enabled = true
+  c.tracing.enabled = Rails.env.production?
+  c.tracing.report_hostname = true
+  c.tracing.log_injection = true
+
+  # From https://docs.datadoghq.com/tracing/metrics/runtime_metrics/ruby/
+  # To enable runtime metrics collection, set `true`. Defaults to `false`
+  # You can also set DD_RUNTIME_METRICS_ENABLED=true to configure this.
+  c.runtime_metrics.enabled = true
+
+  # Optionally, you can configure the DogStatsD instance used for sending runtime metrics.
+  # DogStatsD is automatically configured with default settings if `dogstatsd-ruby` is available.
+  # You can configure with host and port of Datadog agent; defaults to 'localhost:8125'.
+  c.runtime_metrics.statsd = Datadog::Statsd.new
+
+  # Rails
+  c.tracing.instrument :rails
+
+  # Redis
+  c.tracing.instrument :redis
+
+  # Net::HTTP
+  c.tracing.instrument :http
+
+  # Sidekiq
+  c.tracing.instrument :sidekiq
+
+  # Faraday
+  c.tracing.instrument :faraday
+end