JDA (previously known as JDomainApp) is a multi-module Maven project that implements Domain-Driven Design in Java. Key features of JDA include:

1. Micro software architecture (MOSA) which modularises the core domain model in micro-modules (one domain class per module). The architecture is also layered, MVC-enabled and service-ready (supports both RESTful and microservices).
2. MOSA consists in 3 main layers: domain model (the core) layer, module layer and software layer. Each layer is described in a model.
3. aDSL (annotation-based DSL) is used to express the models directly in OOPLs
4. Language: Java
5. Deployed as a multi-module Maven project: each main feature is implemented in a separate module project, allowing them to be selectively imported into software projects

JDA's development started in 2012 as a teaching tool in a software engineering subject at Hanoi University (Vietnam). It was first named jDomainApp, which means that it is a Java-based tool for domain-driven application development.

In 2014, the development of DomainAppTool, which is based on jDomainApp, began when a need was realised for a user-friendly tool that can be used to quickly and interactively execute and test the domain model. We observe that the development of DomainAppTool and, more generally, that of the jDomainApp framework continuously evolves. The tool is used not only to demonstrate the framework’s capabilities but to quickly experiment with any new domain modelling ideas that would eventually be incorporated into the framework.

The 2016-2019 period played a crucial role in the framework's development. Three conference papers were published with an aim to consolidate and formalise (to a certain extent) the core theories that underlie the framework and tool. Two papers, in particular, are the collaborative research works between the framework's author and Dr. Duc-Hanh Dang and Dr. Ha-Viet Nguyen from the Department of Software Engineering (VNU University of Engineering and Technology). These works were later developed into two ISI journal papers.

Another major development of the framework started very recently in 2021 when the framework received a 2-year funding to develop the microservices capabilities. This project has just completed the first phase and is currently in the start of the second phase. Also starting with this project, jDomainApp is officially renamed to become JDA.

At this point, we feel that JDA is stable enough to be released and thus decided to make the source code public. There are still issues to be resoved and untappeded potential to be explored. We hope that the framework would be received by the community, used in software development and be contributed to by developers.