From a data-model to generated access-and store-patterns

This report describes the design and implementation of a repository generation tool that is used to generate repositories from domain models of the ASML TWINSCAN system. The TWINSCAN system handles a huge volume of data. In the current TWINSCAN SW Architecture, data transfer is combined with control flow. Data transfer to a component that is not under the sender’s control must be performed through a common parent in the hierarchy. There are several problems with this approach with respect to execution, encapsulation, and locality of change. These problems drive the need to separate data, control, and algorithms of the scanner’s software architecture. To tackle these problems, the main objective of this project was to design and implement a repository generation tool for generating data repositories from domain models. The structure of this data is defined by a domain model in an implementation independent formalism. The tool supports several flavors of repositories. As a result of the flexibility of the architecture, it is possible to switch between technologies and implementation patterns without touching domain models. The repository generation tool is tested through continues architecture and design reviews by supervisors, unit tests, and tests by stakeholders in the real environment. The results obtained in this project are being used in an active ASML project within the Metrology group. The results have improved productivity and increased efficiency.