Polish 'Align Wavefront application tags support with Spring Boot 2.x'

See gh-32844

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/wavefront/WavefrontMetricsExportAutoConfiguration.java

@@ -77,13 +77,13 @@ public class WavefrontMetricsExportAutoConfiguration {
 
 	@Bean
 	@ConditionalOnBean(ApplicationTags.class)
-	MeterRegistryCustomizer<WavefrontMeterRegistry> applicationTagsCustomizer(ApplicationTags applicationTags) {
-		Tags commonTags = Tags.of(applicationTags.toPointTags().entrySet().stream()
-				.map(WavefrontMetricsExportAutoConfiguration::asTag).toList());
+	MeterRegistryCustomizer<WavefrontMeterRegistry> wavefrontApplicationTagsCustomizer(
+			ApplicationTags wavefrontApplicationTags) {
+		Tags commonTags = Tags.of(wavefrontApplicationTags.toPointTags().entrySet().stream().map(this::asTag).toList());
 		return (registry) -> registry.config().commonTags(commonTags);
 	}
 
-	private static Tag asTag(Map.Entry<String, String> entry) {
+	private Tag asTag(Map.Entry<String, String> entry) {
 		return Tag.of(entry.getKey(), entry.getValue());
 	}
 

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

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.autoconfigure.tracing.wavefront;
 
 import java.util.Collections;
+import java.util.function.Supplier;
 
 import brave.handler.SpanHandler;
 import com.wavefront.sdk.common.WavefrontSender;
@@ -40,10 +41,12 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.context.properties.PropertyMapper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.env.Environment;
+import org.springframework.util.StringUtils;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for Wavefront tracing.
@@ -65,7 +68,7 @@ public class WavefrontTracingAutoConfiguration {
 	 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
 	 * Application Tags</a>
 	 */
-	private static final String DEFAULT_WAVEFRONT_APPLICATION_NAME = "unnamed_application";
+	private static final String DEFAULT_APPLICATION_NAME = "unnamed_application";
 
 	/**
 	 * Default value for the Wavefront Service name if {@code spring.application.name} is
@@ -74,28 +77,26 @@ public class WavefrontTracingAutoConfiguration {
 	 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
 	 * Application Tags</a>
 	 */
-	private static final String DEFAULT_WAVEFRONT_SERVICE_NAME = "unnamed_service";
+	private static final String DEFAULT_SERVICE_NAME = "unnamed_service";
 
 	@Bean
 	@ConditionalOnMissingBean
-	public ApplicationTags applicationTags(Environment environment, WavefrontProperties properties) {
-		String fallbackWavefrontServiceName = environment.getProperty("spring.application.name",
-				DEFAULT_WAVEFRONT_SERVICE_NAME);
+	public ApplicationTags wavefrontApplicationTags(Environment environment, WavefrontProperties properties) {
 		Tracing tracing = properties.getTracing();
-		String wavefrontServiceName = (tracing.getServiceName() != null) ? tracing.getServiceName()
-				: fallbackWavefrontServiceName;
-		String wavefrontApplicationName = (tracing.getApplicationName() != null) ? tracing.getApplicationName()
-				: DEFAULT_WAVEFRONT_APPLICATION_NAME;
+		String wavefrontServiceName = getName(tracing.getServiceName(),
+				() -> environment.getProperty("spring.application.name", DEFAULT_SERVICE_NAME));
+		String wavefrontApplicationName = getName(tracing.getApplicationName(), () -> DEFAULT_APPLICATION_NAME);
+		PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
 		ApplicationTags.Builder builder = new ApplicationTags.Builder(wavefrontApplicationName, wavefrontServiceName);
-		if (tracing.getClusterName() != null) {
-			builder.cluster(tracing.getClusterName());
-		}
-		if (tracing.getShardName() != null) {
-			builder.shard(tracing.getShardName());
-		}
+		map.from(tracing::getClusterName).to(builder::cluster);
+		map.from(tracing::getShardName).to(builder::shard);
 		return builder.build();
 	}
 
+	private String getName(String value, Supplier<String> fallback) {
+		return (StringUtils.hasText(value)) ? value : fallback.get();
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(WavefrontSpanHandler.class)
 	static class WavefrontMicrometer {

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/wavefront/WavefrontProperties.java

@@ -21,8 +21,6 @@ import java.net.URI;
 import java.net.UnknownHostException;
 import java.time.Duration;
 
-import com.wavefront.sdk.common.application.ApplicationTags;
-
 import org.springframework.boot.actuate.autoconfigure.metrics.export.properties.PushRegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.source.InvalidConfigurationPropertyValueException;
@@ -264,37 +262,24 @@ public class WavefrontProperties {
 	public static class Tracing {
 
 		/**
-		 * Wavefront Application name used in {@link ApplicationTags}. Defaults to
+		 * Wavefront Application name used in ApplicationTags. Defaults to
 		 * 'unnamed_application'.
-		 * @see <a href=
-		 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
-		 * Application Tags</a>
 		 */
 		private String applicationName;
 
 		/**
-		 * Wavefront Service name used in {@link ApplicationTags}, falling back to
-		 * {@code spring.application.name}. If both are unset it defaults to
-		 * 'unnamed_service'.
-		 * @see <a href=
-		 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
-		 * Application Tags</a>
+		 * Wavefront Service name used in ApplicationTags, falling back to
+		 * 'spring.application.name'. If both are unset it defaults to 'unnamed_service'.
 		 */
 		private String serviceName;
 
 		/**
-		 * Optional Wavefront Cluster name used in {@link ApplicationTags}.
-		 * @see <a href=
-		 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
-		 * Application Tags</a>
+		 * Optional Wavefront Cluster name used in ApplicationTags.
 		 */
 		private String clusterName;
 
 		/**
-		 * Optional Wavefront Shard name used in {@link ApplicationTags}.
-		 * @see <a href=
-		 * "https://docs.wavefront.com/trace_data_details.html#application-tags">Wavefront
-		 * Application Tags</a>
+		 * Optional Wavefront Shard name used in ApplicationTags.
 		 */
 		private String shardName;
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/wavefront/WavefrontMetricsExportAutoConfigurationTests.java

@@ -88,13 +88,12 @@ class WavefrontMetricsExportAutoConfigurationTests {
 
 	@Test
 	void exportsApplicationTagsInWavefrontRegistry() {
-		ApplicationTags.Builder appTagsBuilder = new ApplicationTags.Builder("super-application", "super-service");
-		appTagsBuilder.cluster("super-cluster");
-		appTagsBuilder.shard("super-shard");
-		appTagsBuilder.customTags(Map.of("custom-key", "custom-val"));
-
+		ApplicationTags.Builder builder = new ApplicationTags.Builder("super-application", "super-service");
+		builder.cluster("super-cluster");
+		builder.shard("super-shard");
+		builder.customTags(Map.of("custom-key", "custom-val"));
 		this.contextRunner.withConfiguration(AutoConfigurations.of(MetricsAutoConfiguration.class))
-				.withUserConfiguration(BaseConfiguration.class).withBean(ApplicationTags.class, appTagsBuilder::build)
+				.withUserConfiguration(BaseConfiguration.class).withBean(ApplicationTags.class, builder::build)
 				.run((context) -> {
 					WavefrontMeterRegistry registry = context.getBean(WavefrontMeterRegistry.class);
 					registry.counter("my.counter", "env", "qa");