Optimizely Go SDK

This repository houses the Go SDK for use with Optimizely Feature Experimentation and Optimizely Full Stack (legacy).

Optimizely Feature Experimentation is an A/B testing and feature management tool for product development teams that enables you to experiment at every step. Using Optimizely Feature Experimentation allows for every feature on your roadmap to be an opportunity to discover hidden insights. Learn more at Optimizely.com, or see the developer documentation.

Optimizely Rollouts is free feature flags for development teams. You can easily roll out and roll back features in any application without code deploys, mitigating risk for every feature on your roadmap.

Get Started

Refer to the Go SDK's developer documentation for detailed instructions on getting started with using the SDK.

Requirements

Requires Golang version:

SDK Version	Required Golang Version
v2.0.0	1.21.0 or higher
< v2.0.0	1.13 or higher

Install the SDK

Install from github:

go get github.com/optimizely/go-sdk/v2

Install from source:

go get github.com/optimizely/go-sdk/v2
cd $GOPATH/src/github.com/optimizely/go-sdk/v2
go install

NOTE: We practice trunk-based development, and as such our default branch, master might not always be the most stable. We do tag releases on Github and you can pin your installation to those particular release versions. One way to do this is to use Go Modules for managing external dependencies:

Install using go.mod:

module mymodule

go 1.21.0

require (
	github.com/optimizely/go-sdk/v2 v2.0.0
)

If you are already using go.mod in your application you can run the following:

go mod edit -require github.com/optimizely/go-sdk/[email protected]

NOTE:

go get github.com/optimizely/go-sdk/v2/...

or

go get github.com/optimizely/go-sdk/v2/pkg

will install it as a package to pkg directory, rather than src directory. It could be useful for future development and vendoring.

Use the Go SDK

See the example file in examples/main.go.

Initialization

import optly "github.com/optimizely/go-sdk/v2"
import "github.com/optimizely/go-sdk/v2/client"

// Simple one-line initialization with the SDK key    
optlyClient, err := optly.Client("SDK_KEY")    

// You can also instantiate with a hard-coded datafile using our client factory method    
optimizelyFactory := &client.OptimizelyFactory {        
  Datafile: []byte("datafile_string"),   
}    
optlyClient, err = optimizelyFactory.Client()

Make Decisions

import ( 
  optly "github.com/optimizely/go-sdk/v2" 
) 

// instantiate a client 
client, err := optly.Client("SDK_KEY") 

// User attributes are optional and used for targeting and results segmentation 
attributes := map[string]interface{}{ 
  "state": "California", 
  "likes_donuts": true, 
} 

user := client.CreateUserContext("optimizely end user", attributes) 
options := []decide.OptimizelyDecideOptions{decide.IncludeReasons} 

decision := user.Decide("my_flag", options) 
var variationKey string 
if variationKey = decision.VariationKey; variationKey == "" { 
  fmt.Printf("[decide] error: %v", decision.Reasons) 
  return 
} 

if variationKey == "control" { 
	// Execute code for control variation 
} else if variationKey == "treatment" { 
	// Execute code for treatment variation 
}

SDK Development

Unit Tests

Run

make test 

Contributing

Please see CONTRIBUTING.

Credits

This software is distributed with code from the following open source projects:

murmur3 Copyright 2013, Sébastien Paolacci. License (BSD-3 Clause): https://github.com/twmb/murmur3/blob/master/LICENSE

uuid Copyright (c) 2009, 2014 Google Inc. All rights reserved. License (BSD-3 Clause): https://github.com/google/uuid/blob/master/LICENSE

testify Copyright (c) 2012-2018 Mat Ryer and Tyler Bunnell. License (MIT): https://github.com/stretchr/testify/blob/master/LICENSE

json-iterator Copyright (c) 2016 json-iterator License (MIT): https://github.com/json-iterator/go/blob/master/LICENSE

subset Copyright (c) 2015, Facebook, Inc. All rights reserved. License (BSD): https://github.com/facebookarchive/subset/blob/master/license

profile Copyright (c) 2013 Dave Cheney. All rights reserved. License (BSD): https://github.com/pkg/profile/blob/master/LICENSE

sync Copyright (c) 2009 The Go Authors. All rights reserved. https://github.com/golang/sync/blob/master/LICENSE

opentelemetry-go Copyright The OpenTelemetry Authors License (Apache-2.0): https://github.com/open-telemetry/opentelemetry-go/blob/main/LICENSE

Other Optimizely SDKs

• Agent - https://github.com/optimizely/agent

• Android - https://github.com/optimizely/android-sdk

• C# - https://github.com/optimizely/csharp-sdk

• Flutter - https://github.com/optimizely/optimizely-flutter-sdk

• Java - https://github.com/optimizely/java-sdk

• JavaScript - https://github.com/optimizely/javascript-sdk

• PHP - https://github.com/optimizely/php-sdk

• Python - https://github.com/optimizely/python-sdk

• React - https://github.com/optimizely/react-sdk

• Ruby - https://github.com/optimizely/ruby-sdk

• Swift - https://github.com/optimizely/swift-sdk