State-of-the-art technology stack
The A12 architecture is built upon a carefully selected set of tried-and-trusted technologies.
- On the client-side, the BAP client framework lays the foundation for quickly building modularized front-ends. It is built around the established React/Redux ecosystem, integrates the A12 UI components like engines and widgets, and calls to the A12 services in the backend via HTTP/REST endpoints. Custom backend connectivity is of course possible and actually most aspects of the BAP client can be customized and even overridden with extension points and plugins.
- The A12 services consists of data document persistence including search (Solr), workflow engine (BPMN 2), authentication/login (OAuth 2/JWT) and user/role management. The services are built on Spring Boot and can be used out-of-the-box but also extended with custom code.
Document-based Data Access
The A12 architecture is built around the concept of data documents as hierarchical collections of field values. These documents can be accessed and stored from the client. Search results are provided by the search service using Solr search indizes. There are, however, two distinguished features not found anywhere:
1) document models (schemas) not only specify field types but also validation/integrity rules and computation in a very powerful language.
2) full support for managed relationships; documents can be linked and the relationship properties and constrained can be modelled and are enforced by the data document storage service. To go one step further, the BAP client provides prebuild UI components for the front-end list and editing of relationship links.