Add property 'management.wavefront.trace-derived-custom-tag-keys'

Closes gh-34194

Author: mhalbritter

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.boot.actuate.autoconfigure.tracing.wavefront;
 
-import java.util.Collections;
-
 import brave.handler.SpanHandler;
 import com.wavefront.sdk.common.WavefrontSender;
 import com.wavefront.sdk.common.application.ApplicationTags;
@@ -65,7 +63,7 @@ public class WavefrontTracingAutoConfiguration {
 	WavefrontSpanHandler wavefrontSpanHandler(WavefrontProperties properties, WavefrontSender wavefrontSender,
 			SpanMetrics spanMetrics, ApplicationTags applicationTags) {
 		return new WavefrontSpanHandler(properties.getSender().getMaxQueueSize(), wavefrontSender, spanMetrics,
-				properties.getSourceOrDefault(), applicationTags, Collections.emptySet());
+				properties.getSourceOrDefault(), applicationTags, properties.getTraceDerivedCustomTagKeys());
 	}
 
 	@Configuration(proxyBeanMethods = false)

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,8 @@
 import java.net.URI;
 import java.net.UnknownHostException;
 import java.time.Duration;
+import java.util.HashSet;
+import java.util.Set;
 
 import org.springframework.boot.actuate.autoconfigure.metrics.export.properties.PushRegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
@@ -68,6 +70,11 @@ public class WavefrontProperties {
 	 */
 	private final Metrics metrics = new Metrics();
 
+	/**
+	 * Customized span tags for RED metrics.
+	 */
+	private Set<String> traceDerivedCustomTagKeys = new HashSet<>();
+
 	public Application getApplication() {
 		return this.application;
 	}
@@ -150,6 +157,14 @@ private boolean usesProxy() {
 		return "proxy".equals(this.uri.getScheme());
 	}
 
+	public Set<String> getTraceDerivedCustomTagKeys() {
+		return this.traceDerivedCustomTagKeys;
+	}
+
+	public void setTraceDerivedCustomTagKeys(Set<String> traceDerivedCustomTagKeys) {
+		this.traceDerivedCustomTagKeys = traceDerivedCustomTagKeys;
+	}
+
 	public static class Application {
 
 		/**