Honour management.metrics.web.server.auto-time-requests with WebFlux

Closes gh-13895

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/web/reactive/WebFluxMetricsAutoConfiguration.java

@@ -66,7 +66,8 @@ public class WebFluxMetricsAutoConfiguration {
 	public MetricsWebFilter webfluxMetrics(MeterRegistry registry,
 			WebFluxTagsProvider tagConfigurer) {
 		return new MetricsWebFilter(registry, tagConfigurer,
-				this.properties.getWeb().getServer().getRequestsMetricName());
+				this.properties.getWeb().getServer().getRequestsMetricName(),
+				this.properties.getWeb().getServer().isAutoTimeRequests());
 	}
 
 	@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/web/reactive/WebFluxMetricsAutoConfigurationTests.java

@@ -98,6 +98,19 @@ public class WebFluxMetricsAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void metricsAreNotRecordedIfAutoTimeRequestsIsDisabled() {
+		this.contextRunner
+				.withConfiguration(AutoConfigurations.of(WebFluxAutoConfiguration.class))
+				.withUserConfiguration(TestController.class)
+				.withPropertyValues(
+						"management.metrics.web.server.auto-time-requests=false")
+				.run((context) -> {
+					MeterRegistry registry = getInitializedMeterRegistry(context);
+					assertThat(registry.find("http.server.requests").meter()).isNull();
+				});
+	}
+
 	private MeterRegistry getInitializedMeterRegistry(
 			AssertableReactiveWebApplicationContext context) {
 		WebTestClient webTestClient = WebTestClient.bindToApplicationContext(context)

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/MetricsWebFilter.java

@@ -46,16 +46,36 @@ public class MetricsWebFilter implements WebFilter {
 
 	private final String metricName;
 
+	private final boolean autoTimeRequests;
+
+	/**
+	 * Create a new {@code MetricsWebFilter}.
+	 * @param registry the registry to which metrics are recorded
+	 * @param tagsProvider provider for metrics tags
+	 * @param metricName name of the metric to record
+	 * @deprecated since 2.0.6 in favour of
+	 * {@link #MetricsWebFilter(MeterRegistry, WebFluxTagsProvider, String, boolean)}
+	 */
+	@Deprecated
 	public MetricsWebFilter(MeterRegistry registry, WebFluxTagsProvider tagsProvider,
 			String metricName) {
+		this(registry, tagsProvider, metricName, true);
+	}
+
+	public MetricsWebFilter(MeterRegistry registry, WebFluxTagsProvider tagsProvider,
+			String metricName, boolean autoTimeRequests) {
 		this.registry = registry;
 		this.tagsProvider = tagsProvider;
 		this.metricName = metricName;
+		this.autoTimeRequests = autoTimeRequests;
 	}
 
 	@Override
 	public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
-		return chain.filter(exchange).compose((call) -> filter(exchange, call));
+		if (this.autoTimeRequests) {
+			return chain.filter(exchange).compose((call) -> filter(exchange, call));
+		}
+		return chain.filter(exchange);
 	}
 
 	private Publisher<Void> filter(ServerWebExchange exchange, Mono<Void> call) {