Orca

ORCA (Object Relational CApability) is an ORM framework for Java.

Motivation

Why another framework, why not Hibernate (i.e. JPA)?

These are some of the advantages that inspire us to build Orca:

1. Orca supports low-code application development.
2. Hibernate is a stateful framework so you need to access data in the scope of an open session (i.e. PersistenceContext). Orca is a stateless framework so you can use it more easily.
3. Orca solves multiple performance issues of Hibernate like N+1 query and slow flush.

Project Status

This project is in an early stage. We are actively working to make it production ready. MySQL and PostgreSQL will be supported first.

Supported features:

• entity metadata definition
• entity class generation
• DB schema generation
• CRUD
• associations (everything: one-to-one, one-to-many, many-to-one, many-to-many)
• cascading
• finding by object navigation path.
• Especially, it can handle circular associations (e.g. A->A and A->B->A).

Currently, its features are proven by unit tests and an example application.

You can check these code paths for what things it can do:

• Tests https://github.com/sorra/orca/tree/main/orca-core/src/test
• Application https://github.com/sorra/orca/tree/main/orca-example

License

Orca is Open Source software released under the Apache 2.0 license.