babyfish-ct/jimmer

Health v2 · maintenance only

Adoption not part of the score

1662 stars · 154 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Jimmer is a modern ORM framework for the JVM supporting both Java and Kotlin, built around immutable entities and type-safe query DSLs. It reads and writes arbitrarily shaped object graphs as a whole, with built-in caching, DTO code generation, and GraphQL-style fetching.

Use cases

• query relational databases with a type-safe DSL instead of raw SQL
• fetch nested object graphs without N+1 queries
• save complex object graphs with batched upserts
• generate DTOs and OpenAPI/TypeScript contracts at compile time
• add multi-layer caching with automatic cache consistency for entities
• serve GraphQL APIs backed by a relational database
• build Spring Boot backends with advanced SQL features like CTEs and recursive queries

When to choose

• you want a modern, type-safe ORM on the JVM for Java or Kotlin
• your application reads and writes deeply nested object graphs
• you need built-in object/association caching with consistency maintenance
• you want compile-time DTO generation and GraphQL-style fetching

When to avoid

• you need a traditional POJO-based ORM like JPA/Hibernate with existing entity mappings
• you work outside the JVM ecosystem
• you prefer hand-written SQL or lightweight query builders over a full ORM
• your project depends on libraries requiring mutable POJO entities

Facets

framework · maturity active

orm database caching graphql serialization databases backend web-development developer-tools jvm cross-platform immutable-entities type-safe-dsl dto-language graph-queries spring-boot jdbc cache-consistency no-n-plus-1 code-generation

Member repositories

For agents

markdown · JSON · MCP: product_card(name="babyfish-ct/jimmer")