Bucket4j 7.0.0 release notes

Release 7.0.0 is addressed for redesign of distributed facilities

Migration guide for basic(non-distributed) functionality

Backward compatibility for local buckets was not broken. If you do not use distributed features then upgrade will be transparent for you.

some API was marked as deprecated, it will be removed in the 2023. Each deprecation note picks to the new API that should be used instead.
Migration guide for non-distributed functionality

API for distributed facilities was rewritten a lot, especially the builder API. The best migration strategy will be just find documentation for your particular backend there and rewrite the code according instructions.