Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

cmab

package

Go to main page

Versions in this module

v2

v2.4.0

Apr 23, 2026

v2.3.1

Jan 22, 2026

v2.3.0

Dec 12, 2025

Changes in this version

+ const DefaultPredictionEndpointTemplate

type ClientOptions

+ PredictionEndpointTemplate string

type Config

+ PredictionEndpointTemplate string

v2.2.1

Oct 24, 2025

v2.2.0

Sep 30, 2025

Changes in this version

+ const CmabFetchFailed

+ const DefaultBackoffMultiplier

+ const DefaultCacheSize

+ const DefaultCacheTTL

+ const DefaultHTTPTimeout

+ const DefaultInitialBackoff

+ const DefaultMaxBackoff

+ const DefaultMaxRetries

+ const NumLockStripes

+ var CMABPredictionEndpoint = "https://prediction.cmab.optimizely.com/predict/%s"

+ func FetchFailedError(experimentKey string) error

+ type Attribute struct

+ ID string

+ Type string

+ Value interface{}

+ type CacheValue struct

+ AttributesHash string

+ CmabUUID string

+ VariationID string

+ type Client interface

+ FetchDecision func(ruleID string, userID string, attributes map[string]interface{}, ...) (string, error)

+ type ClientOptions struct

+ HTTPClient *http.Client

+ Logger logging.OptimizelyLogProducer

+ RetryConfig *RetryConfig

+ type Config struct

+ Cache cache.CacheWithRemove

+ CacheSize int

+ CacheTTL time.Duration

+ HTTPTimeout time.Duration

+ RetryConfig *RetryConfig

+ func NewDefaultConfig() Config

+ type Decision struct

+ CmabUUID string

+ Reasons []string

+ VariationID string

+ type DefaultCmabClient struct

+ func NewDefaultCmabClient(options ClientOptions) *DefaultCmabClient

+ func (c *DefaultCmabClient) FetchDecision(ruleID string, userID string, attributes map[string]interface{}, ...) (string, error)

+ type DefaultCmabService struct

+ func NewDefaultCmabService(options ServiceOptions) *DefaultCmabService

+ func (s *DefaultCmabService) GetDecision(projectConfig config.ProjectConfig, userContext entities.UserContext, ...) (Decision, error)

+ type Instance struct

+ Attributes []Attribute

+ CmabUUID string

+ ExperimentID string

+ VisitorID string

+ type Prediction struct

+ VariationID string

+ type Request struct

+ Instances []Instance

+ type Response struct

+ Predictions []Prediction

+ type RetryConfig struct

+ BackoffMultiplier float64

+ InitialBackoff time.Duration

+ MaxBackoff time.Duration

+ MaxRetries int

+ type Service interface

+ GetDecision func(projectConfig config.ProjectConfig, userContext entities.UserContext, ...) (Decision, error)

+ type ServiceOptions struct

+ CmabCache cache.CacheWithRemove

+ CmabClient Client

+ Logger logging.OptimizelyLogProducer