Auto-configure observations for RestClients #38500
Description
I was trying out Spring Boot 3.2.0-RC2 and was quite surprised that a RestClient created via RestClient.builder().build() is not auto-instrumented like RestTemplate and WebClient currently are. If I create a RestClientCustomizer in a similar fashion to RestTemplateObservationConfiguration, then observations are properly created for HTTP requests as one could expect:
@Bean
RestClientCustomizer observationRestClientCustomizer(
ObservationRegistry observationRegistry,
ObjectProvider<ClientRequestObservationConvention> customConvention,
ObservationProperties properties) {
String name = properties.getHttp().getClient().getRequests().getName();
ClientRequestObservationConvention observationConvention = customConvention
.getIfAvailable(() -> new DefaultClientRequestObservationConvention(name));
return builder -> builder
.observationRegistry(observationRegistry)
.observationConvention(observationConvention);
}Adding this as an auto configuration would improve the out-of-the-box experience for the new RestClient.