feat: Support CRaC and priming of powertools logging

[David-DAM]

Issue number: Closes #2001

Description of changes:

• Added CRaC support in powertools-logging, following the guide and blogs mentioned on the ticket.
• Added automatic priming for powertools-logging by preloading all the required classes, the list of classes is fetched from the JVM at compile time.

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

Breaking change checklist

RFC issue #:

• Migration process documented
• Implement warnings (if it can live side by side)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[David-DAM]

Hi @phipag I have tested the changes in my own AWS account, below you can find the code and logs that i have used to test this changes

package com.davinchicoder;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import software.amazon.lambda.powertools.logging.PowertoolsLogging;

import java.util.Map;

/**
 * Lambda function entry point. You can change to use other pojo type or implement
 * a different RequestHandler.
 *
 * @see <a href=https://docs.aws.amazon.com/lambda/latest/dg/java-handler.html>Lambda Java Handler</a> for more information
 */
public class App implements RequestHandler<Map<String, String>, String> {

    private static final Logger log = LoggerFactory.getLogger(App.class);

    static {
        log.info("Static initializer");
        PowertoolsLogging.init();
    }

    public App() {
        log.info("Constructor");
    }

    @Override
    public String handleRequest(Map<String, String> input, Context context) {
        return PowertoolsLogging.withLogging(context, () -> {

            log.info("Handling request");

            return "OK";
        });
    }
}

2026-08-09T08:00:01.160Z
INIT_START Runtime Version: java:21.mainline.v80 Runtime Version ARN: arn:aws:lambda:eu-west-3::runtime:8dee5610caeca919f0d5a76f2750ab61a125e33d6e3ca2757239cf7c06e3bed3
2026-08-09T08:00:03.280Z
08:00:03.261 [main] INFO com.davinchicoder.App - Static initializer
2026-08-09T08:00:03.341Z
08:00:03.340 [main] INFO com.davinchicoder.App - Constructor
2026-08-09T08:00:06.861Z
08:00:06.860 [main] DEBUG s.a.l.p.c.internal.ClassPreLoader - SnapStart priming: preloaded 3520 class(es) from classesloaded.txt
2026-08-09T08:00:06.945Z
INIT_REPORT Init Duration: 5785.33 ms

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[David-DAM]

@phipag Could you please review this PR?

[phipag]

Thanks for adding SnapStart priming to the logging module, @David-DAM. The CRaC registration follows the same pattern as tracing and large messages. I left two comments to address before we merge.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[phipag]

Thanks @David-DAM for your contribution, again!

[mergify]

This pull request does not currently match the merge queue conditions, so it cannot be queued from here. The box comes back if it matches again.