COLA is a core architectural toolkit for Java applications designed around domain-driven design and a clean, object-oriented layered architecture. It provides a framework for managing project structures, implementing domain-driven entity modeling, and organizing enterprise application architecture to decouple business logic from technical dependencies.
The project features a pluggable logic extension system that allows for the addition of new functionality through defined extension points without modifying the core codebase. It also includes a project bootstrapping toolkit and an integration testing orchestrator that utilizes container components to run isolated tests for backend services.
Further capabilities include an application state machine for coordinating complex object transitions and a standardized exception hierarchy for centralized error handling and logging. The framework also provides mechanisms for standardized data transfer and the generation of pre-configured project skeletons using architectural archetypes.