Drop support for "all" from management.metrics.distribution.sla

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/MetricsProperties.java

@@ -192,10 +192,9 @@ public static class Distribution {
 
 		/**
 		 * Specific SLA boundaries for meter IDs starting-with the specified name. The
-		 * longest match wins, the key `all` can also be used to configure all meters.
-		 * Counters will be published for each specified boundary. Values can be specified
-		 * as a long or as a Duration value (for timer meters, defaulting to ms if no unit
-		 * specified).
+		 * longest match wins. Counters will be published for each specified boundary.
+		 * Values can be specified as a long or as a Duration value (for timer meters,
+		 * defaulting to ms if no unit specified).
 		 */
 		private final Map<String, ServiceLevelAgreementBoundary[]> sla = new LinkedHashMap<>();
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilter.java

@@ -19,6 +19,7 @@
 import java.util.Arrays;
 import java.util.Map;
 import java.util.Objects;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 import io.micrometer.core.instrument.Meter;
@@ -39,6 +40,7 @@
  * @author Jon Schneider
  * @author Phillip Webb
  * @author Stephane Nicoll
+ * @author Artsiom Yudovin
  * @since 2.0.0
  */
 public class PropertiesMeterFilter implements MeterFilter {
@@ -66,7 +68,7 @@ private static MeterFilter createMapFilter(Map<String, String> tags) {
 
 	@Override
 	public MeterFilterReply accept(Meter.Id id) {
-		boolean enabled = lookup(this.properties.getEnable(), id, true);
+		boolean enabled = lookupWithFallbackToAll(this.properties.getEnable(), id, true);
 		return enabled ? MeterFilterReply.NEUTRAL : MeterFilterReply.DENY;
 	}
 
@@ -80,9 +82,10 @@ public DistributionStatisticConfig configure(Meter.Id id,
 			DistributionStatisticConfig config) {
 		Distribution distribution = this.properties.getDistribution();
 		return DistributionStatisticConfig.builder()
-				.percentilesHistogram(
-						lookup(distribution.getPercentilesHistogram(), id, null))
-				.percentiles(lookup(distribution.getPercentiles(), id, null))
+				.percentilesHistogram(lookupWithFallbackToAll(
+						distribution.getPercentilesHistogram(), id, null))
+				.percentiles(
+						lookupWithFallbackToAll(distribution.getPercentiles(), id, null))
 				.sla(convertSla(id.getType(), lookup(distribution.getSla(), id, null)))
 				.build().merge(config);
 	}
@@ -101,6 +104,18 @@ private <T> T lookup(Map<String, T> values, Id id, T defaultValue) {
 		if (values.isEmpty()) {
 			return defaultValue;
 		}
+		return this.baseLookup(values, id, () -> defaultValue);
+	}
+
+	private <T> T lookupWithFallbackToAll(Map<String, T> values, Id id, T defaultValue) {
+		if (values.isEmpty()) {
+			return defaultValue;
+		}
+		return this.baseLookup(values, id,
+				() -> values.getOrDefault("all", defaultValue));
+	}
+
+	private <T> T baseLookup(Map<String, T> values, Id id, Supplier<T> defaultValue) {
 		String name = id.getName();
 		while (StringUtils.hasLength(name)) {
 			T result = values.get(name);
@@ -110,7 +125,8 @@ private <T> T lookup(Map<String, T> values, Id id, T defaultValue) {
 			int lastDot = name.lastIndexOf('.');
 			name = (lastDot != -1) ? name.substring(0, lastDot) : "";
 		}
-		return values.getOrDefault("all", defaultValue);
+
+		return defaultValue.get();
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilterTests.java

@@ -42,6 +42,7 @@
  *
  * @author Phillip Webb
  * @author Jon Schneider
+ * @author Artsiom Yudovin
  */
 public class PropertiesMeterFilterTests {
 
@@ -254,42 +255,11 @@ public void configureWhenHasHigherSlaAndLowerShouldSetSlaToHigher() {
 	}
 
 	@Test
-	public void configureWhenAllSlaSetShouldSetSlaToValue() {
+	public void acceptWhenHasNoMatchingEnabledPropertyShouldReturnNeutral() {
 		PropertiesMeterFilter filter = new PropertiesMeterFilter(
-				createProperties("distribution.sla.all=1,2,3"));
-		assertThat(filter.configure(createMeterId("spring.boot"),
-				DistributionStatisticConfig.DEFAULT).getSlaBoundaries())
-						.containsExactly(1000000, 2000000, 3000000);
-	}
-
-	@Test
-	public void configureWhenSlaDurationShouldOnlyApplyToTimer() {
-		PropertiesMeterFilter filter = new PropertiesMeterFilter(
-				createProperties("distribution.sla.all=1ms,2ms,3ms"));
-		Meter.Id timer = createMeterId("spring.boot", Meter.Type.TIMER);
-		Meter.Id summary = createMeterId("spring.boot", Meter.Type.DISTRIBUTION_SUMMARY);
-		Meter.Id counter = createMeterId("spring.boot", Meter.Type.COUNTER);
-		assertThat(filter.configure(timer, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).containsExactly(1000000, 2000000, 3000000);
-		assertThat(filter.configure(summary, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).isNullOrEmpty();
-		assertThat(filter.configure(counter, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).isNullOrEmpty();
-	}
-
-	@Test
-	public void configureWhenSlaLongShouldOnlyApplyToTimerAndDistributionSummary() {
-		PropertiesMeterFilter filter = new PropertiesMeterFilter(
-				createProperties("distribution.sla.all=1,2,3"));
-		Meter.Id timer = createMeterId("spring.boot", Meter.Type.TIMER);
-		Meter.Id summary = createMeterId("spring.boot", Meter.Type.DISTRIBUTION_SUMMARY);
-		Meter.Id counter = createMeterId("spring.boot", Meter.Type.COUNTER);
-		assertThat(filter.configure(timer, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).containsExactly(1000000, 2000000, 3000000);
-		assertThat(filter.configure(summary, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).containsExactly(1, 2, 3);
-		assertThat(filter.configure(counter, DistributionStatisticConfig.DEFAULT)
-				.getSlaBoundaries()).isNullOrEmpty();
+				createProperties("enable.something.else=false"));
+		assertThat(filter.accept(createMeterId("spring.boot")))
+				.isEqualTo(MeterFilterReply.NEUTRAL);
 	}
 
 	private Id createMeterId(String name) {

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -1381,7 +1381,7 @@ content into your application. Rather, pick only the properties that you need.
 	# METRICS
 	management.metrics.distribution.percentiles-histogram.*= # Whether meter IDs starting with the specified name should publish percentile histograms.
 	management.metrics.distribution.percentiles.*= # Specific computed non-aggregable percentiles to ship to the backend for meter IDs starting-with the specified name.
-	management.metrics.distribution.sla.*= # Specific SLA boundaries for meter IDs starting-with the specified name. The longest match wins, the key `all` can also be used to configure all meters.
+	management.metrics.distribution.sla.*= # Specific SLA boundaries for meter IDs starting-with the specified name. The longest match wins.
 	management.metrics.enable.*= # Whether meter IDs starting-with the specified name should be enabled. The longest match wins, the key `all` can also be used to configure all meters.
 	management.metrics.export.atlas.batch-size=10000 # Number of measurements per request to use for this backend. If more measurements are found, then multiple requests will be made.
 	management.metrics.export.atlas.config-refresh-frequency=10s # Frequency for refreshing config settings from the LWC service.