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JSimpleDB makes powerful persistence simple for Java programmers.

JSimpleDB's goal is to make Java persistence as simple as possible, doing so in a Java-centric manner, while remaining strictly type safe.

JSimpleDB does this without sacrificing flexibility or scalability by relegating the database to the simplest role possible - storing data as key/value pairs - and providing all other supporting features, such as indexes, command line interface, etc., in a simpler, type-safe, Java-centric way.

JSimpleDB also adds important new features that traditional databases don't provide.

• Designed from the ground up to be Java-centric; completely type-safe.
• Works on top of any database that can function as a key/value store (SQL, NoSQL, etc.)
• Scales gracefully to large data sets; no "whole database" operation is ever required
• Configured entirely via Java annotations (only one is required)
• Queries are regular Java code - there is no "query language" needed
• Change notifications from arbitrarily distant objects
• Built-in support for rolling schema changes across multiple nodes with no downtime
• Supports simple and composite indexes and user-defined custom types
• Extensible command line interface (CLI) supporting arbitrary Java queries
• Built-in Java-aware graphical user interface (GUI) based on Vaadin

Read the FAQ and Introduction for more info, check out the JPA_Comparison, browse the Javadocs, or join the JSimpleDB Users discussion group.

JSimpleDB is a new project (created in 2014) but developing rapidly.