feat: Add ActionView instrumentation via ActiveSupport::Notifications

.toys/.data/releases.yml

@@ -31,6 +31,10 @@ commit_lint:
 #  *  changelog_path: Path to CHANGLEOG.md relative to the gem directory.
 #     (Required only if it is not in the expected location.)
 gems:
+  - name: opentelemetry-instrumentation-action_view
+    directory: instrumentation/action_view
+    version_constant: [OpenTelemetry, Instrumentation, ActionView, VERSION]
+
   - name: opentelemetry-instrumentation-active_job
     directory: instrumentation/active_job
     version_constant: [OpenTelemetry, Instrumentation, ActiveJob, VERSION]

instrumentation/action_view/.rubocop.yml

@@ -0,0 +1,5 @@
+inherit_from: ../.rubocop-examples.yml
+
+Naming/FileName:
+  Exclude:
+    - "lib/opentelemetry-instrumentation-action_view.rb"

instrumentation/action_view/.yardopts

@@ -0,0 +1,9 @@
+--no-private
+--title=OpenTelemetry Action View Instrumentation
+--markup=markdown
+--main=README.md
+./lib/opentelemetry/instrumentation/**/*.rb
+./lib/opentelemetry/instrumentation.rb
+-
+README.md
+CHANGELOG.md

instrumentation/action_view/Appraisals

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# Rails 5.2 is incompatible with Ruby 3.
+if RUBY_VERSION < '3'
+  appraise 'rails-5.2' do
+    gem 'rails', '~> 5.2.0'
+  end
+end
+
+appraise 'rails-6.0' do
+  gem 'rails', '~> 6.0.0'
+end
+
+appraise 'rails-6.1' do
+  gem 'rails', '~> 6.1.0'
+end

instrumentation/action_view/CHANGELOG.md

@@ -0,0 +1 @@
+# Release History: opentelemetry-instrumentation-action_view

instrumentation/action_view/Gemfile

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+source 'https://rubygems.org'
+
+gemspec
+
+gem 'opentelemetry-api', path: '../../api'
+gem 'opentelemetry-instrumentation-base', path: '../base'
+
+group :test do
+  gem 'byebug'
+  gem 'opentelemetry-common', path: '../../common'
+  gem 'opentelemetry-sdk', path: '../../sdk'
+  gem 'opentelemetry-semantic_conventions', path: '../../semantic_conventions'
+  gem 'pry-byebug'
+end

instrumentation/action_view/LICENSE

@@ -0,0 +1,201 @@
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instrumentation/action_view/README.md

@@ -0,0 +1,55 @@
+# OpenTelemetry ActionView Instrumentation
+
+The ActionView instrumentation is a community-maintained instrumentation for the ActionView portion of the [Ruby on Rails][rails-home] web-application framework.
+
+## How do I get started?
+
+Install the gem using:
+
+```
+gem install opentelemetry-instrumentation-action_view
+gem install opentelemetry-instrumentation-rails
+```
+
+Or, if you use [bundler][bundler-home], include `opentelemetry-instrumentation-action_view` in your `Gemfile`.
+
+## Usage
+
+To use the instrumentation, call `use` with the name of the instrumentation:
+
+```ruby
+OpenTelemetry::SDK.configure do |c|
+  c.use 'OpenTelemetry::Instrumentation::Rails'
+  c.use 'OpenTelemetry::Instrumentation::ActionView'
+end
+```
+
+Alternatively, you can also call `use_all` to install all the available instrumentation.
+
+```ruby
+OpenTelemetry::SDK.configure do |c|
+  c.use_all
+end
+```
+
+## Examples
+
+Example usage can be seen in the `./example/trace_request_demonstration.ru` file [here](https://github.com/open-telemetry/opentelemetry-ruby/blob/main/instrumentation/action_view/example/trace_request_demonstration.ru)
+
+## How can I get involved?
+
+The `opentelemetry-instrumentation-action_view` gem source is [on github][repo-github], along with related gems including `opentelemetry-api` and `opentelemetry-sdk`.
+
+The OpenTelemetry Ruby gems are maintained by the OpenTelemetry-Ruby special interest group (SIG). You can get involved by joining us in [GitHub Discussions][discussions-url] or attending our weekly meeting. See the [meeting calendar][community-meetings] for dates and times. For more information on this and other language SIGs, see the OpenTelemetry [community page][ruby-sig].
+
+## License
+
+The `opentelemetry-instrumentation-action_view` gem is distributed under the Apache 2.0 license. See [LICENSE][license-github] for more information.
+
+[rails-home]: https://github.com/rails/rails
+[bundler-home]: https://bundler.io
+[repo-github]: https://github.com/open-telemetry/opentelemetry-ruby
+[license-github]: https://github.com/open-telemetry/opentelemetry-ruby/blob/main/LICENSE
+[ruby-sig]: https://github.com/open-telemetry/community#ruby-sig
+[community-meetings]: https://github.com/open-telemetry/community#community-meetings
+[discussions-url]: https://github.com/open-telemetry/opentelemetry-ruby/discussions

instrumentation/action_view/Rakefile

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require 'bundler/gem_tasks'
+require 'rake/testtask'
+require 'yard'
+require 'rubocop/rake_task'
+
+RuboCop::RakeTask.new
+
+Rake::TestTask.new :test do |t|
+  t.libs << 'test'
+  t.libs << 'lib'
+  t.test_files = FileList['test/**/*_test.rb']
+end
+
+YARD::Rake::YardocTask.new do |t|
+  t.stats_options = ['--list-undoc']
+end
+
+if RUBY_ENGINE == 'truffleruby'
+  task default: %i[test]
+else
+  task default: %i[test rubocop yard]
+end