[Bug] In the example dubco-samples-spring-boot-trace-skywalking, the run fails

[glynnwei]

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Apache Dubbo Component

Java Samples (apache/dubbo-samples)

Dubbo Version

Dubbo: 3.2.6 JDK: 1.8 SpringBoot: 2.6.4

Steps to reproduce this issue

run error

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method applicationModel in org.apache.dubbo.springboot.skywalking.demo.provider.ObservationConfiguration required a bean of type 'io.micrometer.observation.ObservationRegistry' that could not be found.


Action:

Consider defining a bean of type 'io.micrometer.observation.ObservationRegistry' in your configuration.

What you expected to happen

Class：ObservationConfiguration Method：applicationModel Param: ObservationRegistry observationRegistry Unknown source, need to inject?

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• [X] Yes I am willing to submit a pull request on my own!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[AlbumenJ]

@conghuhu @songxiaosheng PTAL

[songxiaosheng]

@xiaozhigang PATL

[xiaozhigang]

your jdk:1.8 requirement：jdk-17

[glynnwei]

your jdk:1.8 requirement：jdk-17

Support 1.8, do not change 17 org.apache.dubbo.springboot.skywalking.demo.provider.ObservationConfiguration add fix code:

@ConditionalOnBean(ObservationRegistry.class)
@Bean
ApplicationModel applicationModel(@Autowired ObservationRegistry observationRegistry) {
    ApplicationModel applicationModel = ApplicationModel.defaultModel();
    observationRegistry.observationConfig()
            .observationHandler(new ObservationHandler.FirstMatchingCompositeObservationHandler(
                    new SkywalkingSenderTracingHandler(), new SkywalkingReceiverTracingHandler(),
                    new SkywalkingDefaultTracingHandler()
            ));
    applicationModel.getBeanFactory().registerBean(observationRegistry);
    return applicationModel;
}