[QUESTION] Compatibility with Spring Boot 4

[juanpablo-santos]

Hi, quick question,

given the modularity changes in SB4, is it safe to use 1.5.3 there, or should we wait to 2.0 to come out? (seen #100, but there seems no movement since then).

thx + best regards,

[klopfdreh]

Hey,

prometheus-rsocket-proxy is not compatible as the starter depends on a class which has been moved in Spring Boot 4

see: https://github.com/micrometer-metrics/prometheus-rsocket-proxy/blob/main/starter-spring/src/main/java/io/micrometer/prometheus/rsocket/autoconfigure/PrometheusRSocketClientAutoConfiguration.java

Spring Boot 3.x the class configured in AutoConfigureAfter org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus.PrometheusMetricsExportAutoConfiguration

Spring Boot 4.x the class should be configured in AutoConfigureAfter
org.springframework.boot.micrometer.metrics.autoconfigure.export.prometheus.PrometheusMetricsExportAutoConfiguration

Also

org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration should be replaced with org.springframework.boot.micrometer.metrics.autoconfigure.MetricsAutoConfiguration

@jonatan-ivanov - do you plan to keep 2 release versions or are you going to shift to spring boot 4.x?

My suggestion:
1.5.x is for Spring Boot 3 (the EoL OpenSource support ends at June this year btw.)
2.x is for Spring Boot 4

I can provide a PR.