Config mapping vertx default map

[gsmet]

@radcortez I experimented with the new feature you implemented for default map entries on top of #33228 .

Probably a good idea to drive #33228 before focusing on this new one but I promised you some feedback :).

I confirm that it would be better to have a separate annotation as I had to adjust the config reference doc generation: the semantic is really different, let's have a separate annotation.

And apart from that, I got things to compile but I have a weird issue with the Agroal testing.

When running the tests for Agroal (with ./mvnw -f extensions/agroal/ clean install -Dtest-containers -Dstart-containers) I end up with:

Caused by: io.smallrye.config.ConfigValidationException: Configuration validation failed:
	java.util.NoSuchElementException: SRCFG00014: The config property quarkus.datasource.*.health.enabled is required but it could not be found in any config source
	at io.smallrye.config.ConfigMappingProvider.mapConfigurationInternal(ConfigMappingProvider.java:1001)
	at io.smallrye.config.ConfigMappingProvider.lambda$mapConfiguration$3(ConfigMappingProvider.java:957)
	at io.smallrye.config.SecretKeys.doUnlocked(SecretKeys.java:28)
	at io.smallrye.config.ConfigMappingProvider.mapConfiguration(ConfigMappingProvider.java:957)
	at io.smallrye.config.ConfigMappings.mapConfiguration(ConfigMappings.java:91)
	at io.smallrye.config.SmallRyeConfigBuilder.build(SmallRyeConfigBuilder.java:624)
	at io.quarkus.deployment.ExtensionLoader.loadStepsFrom(ExtensionLoader.java:184)
	at io.quarkus.deployment.QuarkusAugmentor.run(QuarkusAugmentor.java:107)
	at io.quarkus.runner.bootstrap.AugmentActionImpl.runAugment(AugmentActionImpl.java:331)
	at io.quarkus.runner.bootstrap.AugmentActionImpl.createInitialRuntimeApplication(AugmentActionImpl.java:252)
	at io.quarkus.test.QuarkusUnitTest.beforeAll(QuarkusUnitTest.java:650)

which is a bit confusing as quarkus.datasource.health.enabled is not in a Map, it's at the root of DataSourcesBuildTimeConfig so there's something odd going on. The error message seems to reference a map entry as it has a * in it: quarkus.datasource.*.health.enabled. Moreover it has a default value.

[radcortez]

Thanks! Let me have a look.

[radcortez]

Seems to be a bug between @WithName in the root property and @WithParentName in the Map property. Let me try to fix it.

[radcortez]

I've fixed the issue and added @WithDefaults instead.

[gsmet]

Closing this one as we will make progress here: #33228 .

[github-actions]

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