SpringBoot 2.4.x Configuration
In their new release, Spring decided to change the logic behind loading configuration files.
To represent elements that may contribute to the environment, a ConfigDataEnvironmentContributor is introduced, each contributor would be replaced during the process.
Spring decided to use a tree as a data structure in order to process/apply the configuration data.
I will refer to ConfigDataEnvironmentContributor as CDEContributor.
Each contributor can imports some properties (more on that later), and it will be appended as children, thus creating a whole tree.
Each contributor will contain some metadata describing the node:
1. location: a configDataLocation that will be resolved using a configDataLocationResolver to one or more ressources.
2. ressource: each propertySource will be wrapped inside a ConfigData object, ConfigResource is indicating from which ConfigData can be loaded.
3. propertySource: the propertySource linked to this node.
4. children: children contributors, as said before, when a contributor is importing some properties a new contributors will be added as children of this contributor. children are created for each importPhase.
5.kind: there are various…
