Jimmer is an object-relational mapping framework for Java and Kotlin applications running on the JVM.
It offers strongly typed query DSLs, compile-time code generation and flexible handling of complex data structures. Jimmer can query and save object graphs of arbitrary shapes while avoiding the N+1 query problem. It also provides DTO generation, caching, SQL optimisation, pagination, GraphQL integration and client contract generation.
This is free and open source software.
Key Features
- Provides strongly typed query DSLs for Java and Kotlin.
- Supports dynamic queries involving multiple database tables.
- Allows native SQL expressions to be incorporated into queries.
- Supports derived tables, common table expressions and recursive CTEs.
- Automatically removes or merges unnecessary table joins.
- Generates and optimises count queries for pagination.
- Includes a compile-time language and generator for input, output and specification DTOs.
- Queries and saves object graphs of arbitrary shapes.
- Avoids the N+1 query problem when loading associated data.
- Uses batch DML and native upsert functionality when saving data.
- Offers configurable multi-level caching with automatic consistency management.
- Supports GraphQL, OpenAPI and TypeScript client contract generation.
Website: github.com/babyfish-ct/jimmer
Support:
Developer: babyfish-ct
License: Apache License 2.0
Jimmer is written in Java. Learn Java with our recommended free books and free tutorials.
Related Software
| Java Object-Relational Mapping Software | |
|---|---|
| Hibernate ORM | Idiomatic persistence for Java and relational databases |
| MyBatis | Persistence framework with custom SQL and stored procedures |
| Apache Cayenne | Provides object-relational mapping (ORM) and remoting services |
| jOOQ | jOOQ Object Oriented Querying |
| DataNucleus | Supports JDO and JPA API's for persistence |
| Apache OpenJPA | Java persistence project |
| Ebean | Designed to be simpler to use and understand than JPA or JDO products |
| EclipseLink | Persistence solution addressing relational, XML, and database web services |
| Persism | Lightweight, auto discovery, autoconfiguration ORM |
Read our verdict in the software roundup.
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