As a sysadmin I want to use MicroProfile Config API to configure my installation

Now that Payara 5 is actually happening with the release of Dataverse 5 (thank you so much folks!!!), we should re-raise the topic (formerly #5187) of starting to use some of the goodies coming along with this.

As a system admin pushing to cloud, I would greatly benefit from having the possibility to get configuration inside my instance not via mangling with JVM options and database settings. Instead, I would like to see this being more flexible and combined with a hierarchy.

This will also benefit greatly any classic installation, as configuration will be easier than dealing with domain.xml and friends.

Introduce MicroProfile Config API and its support in Payara 5 for code variables and configuration variables, combining 1 & 2.

This will open up the following work items:

• Replace all the System.getProperty().
• Look for the database settings and how to replace them
• Make all of this backward compatible
• Do solid configuration validation
• Look into replacing installers/container scripts configuration of JDBC, JMS, etc with annotations, which are then configured via Config API

Things going on:

• #7700 updating to Payara 5.2021.4 to enable MPCONFIG 2.0 support
• #7639
• #7457
• #7424
• #7418
• #6953 / #7695