Cache nested mapping implementations

[radcortez]

This will reduce runtime operations in the native image by caching nested mapped implementation handles in a static block.

[gsmet]

I'm correct that no changes were made here? You just split the call in two lines.

How exactly do we leverage the cache?

[radcortez]

Yes, it was to make the call more visible, since this is only required to support non-public classes.

The cache is in SR Config:
https://github.com/smallrye/smallrye-config/blob/60923e71855c9f129132aab305a7dd168f219ed6/implementation/src/main/java/io/smallrye/config/ConfigMappingLoader.java#L25-L30

With a MethodHandle for the constructor:
https://github.com/smallrye/smallrye-config/blob/60923e71855c9f129132aab305a7dd168f219ed6/implementation/src/main/java/io/smallrye/config/ConfigMappingLoader.java#L172-L202

Which is used to construct the main mapping and each nested element:
https://github.com/smallrye/smallrye-config/blob/60923e71855c9f129132aab305a7dd168f219ed6/implementation/src/main/java/io/smallrye/config/ConfigMappingLoader.java#L87-L108

I had an idea some time ago that I could generate the constructors' bytecode for nested elements, which would improve this a bit more, but I don't have that yet.

[gsmet]

Unfortunately, this now conflicts with main.

[radcortez]

Was just imports.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit bf79e24.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

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Flaky tests - Develocity

⚙️ JVM Integration Tests - JDK 17 Windows

📦 integration-tests/logging-panache

✖ io.quarkus.logging.LoggingWithPanacheDevModeTest.testRepositoryIsReloaded - History

• io.quarkus.builder.BuildException: Build failure: Build failed due to errors [error]: Build step io.quarkus.devservices.deployment.DevServicesProcessor\#config threw an exception: java.lang.IllegalThreadStateException: process has not exited at java.base/java.lang.ProcessImpl.exitValue(ProcessImpl.java:566) at io.quarkus.deployment.util.ContainerRuntimeUtil.getVersionOutputFor(ContainerRuntimeUtil.java:239) at io.quarkus.deployment.util.ContainerRuntimeUtil.getContainerRuntimeEnvironment(ContainerRuntimeUtil.java:116) - java.lang.RuntimeException

java.lang.RuntimeException: 
io.quarkus.builder.BuildException: Build failure: Build failed due to errors
	[error]: Build step io.quarkus.devservices.deployment.DevServicesProcessor#config threw an exception: java.lang.IllegalThreadStateException: process has not exited
	at java.base/java.lang.ProcessImpl.exitValue(ProcessImpl.java:566)
	at io.quarkus.deployment.util.ContainerRuntimeUtil.getVersionOutputFor(ContainerRuntimeUtil.java:239)
	at io.quarkus.deployment.util.ContainerRuntimeUtil.getContainerRuntimeEnvironment(ContainerRuntimeUtil.java:116)
	at io.quarkus.deployment.util.ContainerRuntimeUtil.detectContainerRuntime(ContainerRuntimeUtil.java:66)
	at io.quarkus.deployment.util.ContainerRuntimeUtil.detectContainerRuntime(ContainerRuntimeUtil.java:55)

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⚙️ JVM Integration Tests - JDK 21

📦 integration-tests/opentelemetry-grpc-only

✖ io.quarkus.it.opentelemetry.grpc.HelloGrpcClientTest.testHello - History

• java.lang.RuntimeException: Failed to start quarkus - java.lang.RuntimeException

java.lang.RuntimeException: java.lang.RuntimeException: Failed to start quarkus
	at io.quarkus.test.junit.QuarkusTestExtension.throwBootFailureException(QuarkusTestExtension.java:668)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:763)
	at java.base/java.util.Optional.orElseGet(Optional.java:364)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.lang.RuntimeException: Failed to start quarkus
	at io.quarkus.runner.ApplicationImpl.doStart(Unknown Source)

• java.lang.RuntimeException: Failed to start quarkus - java.lang.RuntimeException

java.lang.RuntimeException: java.lang.RuntimeException: Failed to start quarkus
	at io.quarkus.test.junit.QuarkusTestExtension.throwBootFailureException(QuarkusTestExtension.java:668)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:763)
	at java.base/java.util.Optional.orElseGet(Optional.java:364)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.lang.RuntimeException: Failed to start quarkus
	at io.quarkus.runner.ApplicationImpl.doStart(Unknown Source)