Metrics are mandatory?

[ashakhov]

Hello.
Since v.1.1.8, it became impossible to run and start the project using SpringCFTurnstile.
It fails with java.lang.NoClassDefFoundError: io/micrometer/core/instrument/MeterRegistry.
In my case, project does not have Spring Boot Actuator for metrics and so far there are no plans to use it.
Is Actuator mandatory now, or is there a way to disable it? Keeping configuration lines empty in .yml does not seem to be enough.

Thanks.

[create-issue-branch]

Branch issue-94-Metrics-are-mandatory created!

[devondragon]

@ashakhov Sorry about that! I am working on a fix for this so the Actuator will not be mandatory. Should have a new release out shortly!

[devondragon]

This has been fixed in v2.0.1, now available on Maven Central.

The root cause was that TurnstileValidationService held a direct bytecode reference to io.micrometer.core.instrument.MeterRegistry, which caused a NoClassDefFoundError at startup when Spring Boot Actuator was not on the classpath.

Fix: Micrometer is now fully optional. All Micrometer references are isolated behind a TurnstileMetrics abstraction with a NoOpTurnstileMetrics fallback that activates automatically when no MeterRegistry bean is available. The library loads cleanly with or without Actuator.

Maven:

<dependency>
    <groupId>com.digitalsanctuary</groupId>
    <artifactId>ds-spring-cf-turnstile</artifactId>
    <version>2.0.1</version>
</dependency>

Gradle:

implementation 'com.digitalsanctuary:ds-spring-cf-turnstile:2.0.1'

Thank you for the report!