Programming languages, libraries and frameworks

The primary programming language for the project is Java.

Programming languages

• Most of the project is written in Java, version ≥ 17
• Some pages use Javascript, most of which is Typescript generated
• HTML page templates are written partly in (minimal) Scala as is common in the Play framework.

Database

• PostgreSQL 15
• Extensive use of views, triggers and stored procedures written in Java?
• Local Java framework (DAOHelper) that forms a thin layer above SQL.

Web framework

• Play framework 2.8.* - Java version.
• (? Play bootstrap support Seems to be no longer maintained.)

Web pages

• HTML 5 avoiding inclusion of too much JavaScript
• Bootstrap CSS¹

Build system

• SBT, because the Play framework probably cannot easily be used in another way

Deployment

• Server needs to run UNIX. Version 1 uses bash scripts to unpack and adjust uploaded question folders
• Docker would ease installation on multiple servers for multiple countries

Footnotes