openfeature-go-feature-flag-provider

GO Feature Flag - OpenFeature Ruby provider

This repository contains the official Ruby OpenFeature provider for accessing your feature flags with GO Feature Flag.

In conjunction with the OpenFeature SDK you will be able to evaluate your feature flags in your Ruby applications.

For documentation related to flags management in GO Feature Flag, refer to the GO Feature Flag documentation website.

Functionalities:

• Manage the integration of the OpenFeature Ruby SDK and GO Feature Flag relay-proxy.

Dependency Setup

Gem Package Manager

Add this line to your application's Gemfile:

gem 'openfeature-go-feature-flag-provider'

And then execute:

bundle install

Or install it yourself as:

gem install openfeature-go-feature-flag-provider

Getting started

Initialize the provider

The OpenFeature::GoFeatureFlag::Provider needs some options to be created and then set in the OpenFeature SDK.

Option	Description
endpoint	(mandatory) The URL to access to the relay-proxy. (example: https://relay.proxy.gofeatureflag.org/)
headers	A Hash object containing the headers to send to the relay-proxy. *(example to send APIKey: {"Authorization" => "Bearer my-api-key"}

The only required option to create a GoFeatureFlagProvider is the URL (endpoint) to your GO Feature Flag relay-proxy instance.

options = OpenFeature::GoFeatureFlag::Options.new(endpoint: "http://localhost:1031")
provider = OpenFeature::GoFeatureFlag::Provider.new(options:)

evaluation_context = OpenFeature::SDK::EvaluationContext.new(targeting_key: "9b9450f8-ab5c-4dcf-872f-feda3f6ccb16")

OpenFeature::SDK.configure do |config|
   config.set_provider(provider)
end
client = OpenFeature::SDK.build_client

bool_value = client.fetch_boolean_value(
  flag_key: "my-boolean-flag",
  default_value: false,
  evaluation_context:
)

if bool_value 
  puts "The flag is enabled"
else
  puts "The flag is disabled"
end

The evaluation context is the way for the client to specify contextual data that GO Feature Flag uses to evaluate the feature flags, it allows to define rules on the flag.

The targeting_key is mandatory for GO Feature Flag to evaluate the feature flag, it could be the id of a user, a session ID or anything you find relevant to use as identifier during the evaluation.

Evaluate a feature flag

The client is used to retrieve values for the current EvaluationContext. For example, retrieving a boolean value for the flag "my-flag":

client = OpenFeature::SDK.build_client

bool_value = client.fetch_boolean_value(
  flag_key: "my-boolean-flag",
  default_value: false,
  evaluation_context: evaluation_context
)

GO Feature Flag supports different all OpenFeature supported types of feature flags, it means that you can use all the accessor directly

# Bool
client.fetch_boolean_value(flag_key: 'my-flag', default_value: false, evaluation_context:)

# String
client.fetch_string_value(flag_key: 'my-flag', default_value: "default", evaluation_context:)

# Number
client.fetch_number_value(flag_key: 'my-flag', default_value: 0, evaluation_context:)

# Object
client.fetch_object_value(flag_key: 'my-flag', default_value: {"default" => true}, evaluation_context:)

Features status

Status	Feature	Description
✅	Flag evaluation	It is possible to evaluate all the type of flags
❌	Caching	Mechanism is in place to refresh the cache in case of configuration change
❌	Event Streaming	Not supported by the SDK
❌	Logging	Not supported by the SDK
✅	Flag Metadata	You can retrieve your flag metadata directly in the evaluation details.

_{Implemented: ✅ | In-progress: ⚠️ | Not implemented yet: ❌}

Contributing

This project welcomes contributions from the community. If you're interested in contributing, see the contributors' guide for some helpful tips.