💾 NDatabase is a lightweight and easy to use indexed key-value store database framework mainly aimed for minecraft bukkit, spigot, sponge servers and is multi-platform

Data Store is a full-featured indexed Java Collection capable of ultra-fast data lookup.

spring-boot and indexing with hibernate-search. Hibernate Search will transparently index every entity persisted, updated, or removed through Hibernate Core. However, you have to trigger initial indexing to populate the Lucene index with the data already present in your database.