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Java-SDK - 4.3.0

2 min

[4.3.0]

Dec 10th, 2025

New Features

CMAB (Contextual Multi-Armed Bandit) Support: Added support for CMAB experiments with new configuration options and cache control (#577, #578, #579, #582, #583, #584, #585, #590, #593)

Add Holdouts Feature: Add Holdout support for feature experimentation (#572, #576)

Multi-Region Support for Data Hosting: Added SDK support for multi-region data hosting (#573)

API Changes

OptimizelyUserContext: New asynchronous decision-making methods

decideAsync(): Asynchronous method to make a decision for a single flag with CMAB support

decideAllAsync(): Asynchronous method to make decisions for all flags

decideForKeysAsync(): Asynchronous method to make decisions for multiple flag keys

Client Initialization:

CmabClientConfig can be injected when initializing the client for custom CMAB configuration

CmabService can be provided to OptimizelyFactory for custom CMAB service implementation

New Decide Options: Added cache control options for CMAB

IGNORE_CMAB_CACHE: Skip reading from CMAB cache

RESET_CMAB_CACHE: Clear and reset CMAB cache before decision

INVALIDATE_USER_CMAB_CACHE: Invalidate cache entries for specific user

https://github.com/optimizely/java-sdk/releases/tag/4.3.0

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