Polish "Add customizer for SdkTracerProviderBuilder"

See gh-34945

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/OpenTelemetryAutoConfiguration.java

@@ -102,13 +102,13 @@ public class OpenTelemetryAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean
 	SdkTracerProvider otelSdkTracerProvider(Environment environment, ObjectProvider<SpanProcessor> spanProcessors,
-			Sampler sampler, ObjectProvider<SdkTracerProviderCustomizer> customizers) {
+			Sampler sampler, ObjectProvider<SdkTracerProviderBuilderCustomizer> customizers) {
 		String applicationName = environment.getProperty("spring.application.name", DEFAULT_APPLICATION_NAME);
 		SdkTracerProviderBuilder builder = SdkTracerProvider.builder()
 			.setSampler(sampler)
 			.setResource(Resource.create(Attributes.of(ResourceAttributes.SERVICE_NAME, applicationName)));
 		spanProcessors.orderedStream().forEach(builder::addSpanProcessor);
-		customizers.forEach((customizer) -> customizer.customize(builder));
+		customizers.orderedStream().forEach((customizer) -> customizer.customize(builder));
 		return builder.build();
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/SdkTracerProviderBuilderCustomizer.java

@@ -16,17 +16,18 @@
 
 package org.springframework.boot.actuate.autoconfigure.tracing;
 
+import io.opentelemetry.sdk.trace.SdkTracerProvider;
 import io.opentelemetry.sdk.trace.SdkTracerProviderBuilder;
 
 /**
- * Callback interface that can be used to customize auto-configured
- * {@link SdkTracerProviderBuilder}.
+ * Callback interface that can be used to customize the {@link SdkTracerProviderBuilder}
+ * that is used to create the auto-configured {@link SdkTracerProvider}.
  *
  * @author Yanming Zhou
  * @since 3.1.0
  */
 @FunctionalInterface
-public interface SdkTracerProviderCustomizer {
+public interface SdkTracerProviderBuilderCustomizer {
 
 	/**
 	 * Customize the given {@code builder}.

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/OpenTelemetryAutoConfigurationTests.java

@@ -46,6 +46,7 @@ import org.springframework.boot.test.context.FilteredClassLoader;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.mock;
@@ -210,6 +211,7 @@ class OpenTelemetryAutoConfigurationTests {
 		this.contextRunner.withUserConfiguration(SdkTracerProviderCustomizationConfiguration.class).run((context) -> {
 			SdkTracerProvider tracerProvider = context.getBean(SdkTracerProvider.class);
 			assertThat(tracerProvider.getSpanLimits().getMaxNumberOfEvents()).isEqualTo(42);
+			assertThat(tracerProvider.getSampler()).isEqualTo(Sampler.alwaysOn());
 		});
 	}
 
@@ -292,13 +294,23 @@ class OpenTelemetryAutoConfigurationTests {
 	private static class SdkTracerProviderCustomizationConfiguration {
 
 		@Bean
-		SdkTracerProviderCustomizer sdkTracerProviderBuilderCustomizer() {
+		@Order(1)
+		SdkTracerProviderBuilderCustomizer sdkTracerProviderBuilderCustomizerOne() {
 			return (builder) -> {
 				SpanLimits spanLimits = SpanLimits.builder().setMaxNumberOfEvents(42).build();
 				builder.setSpanLimits(spanLimits);
 			};
 		}
 
+		@Bean
+		@Order(0)
+		SdkTracerProviderBuilderCustomizer sdkTracerProviderBuilderCustomizerTwo() {
+			return (builder) -> {
+				SpanLimits spanLimits = SpanLimits.builder().setMaxNumberOfEvents(21).build();
+				builder.setSpanLimits(spanLimits).setSampler(Sampler.alwaysOn());
+			};
+		}
+
 	}
 
 }