Add enabled fields in JMX, Prometheus and Simple metrics properties

See spring-projectsgh-30381

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

@@ -31,6 +31,11 @@
 @ConfigurationProperties(prefix = "management.jmx.metrics.export")
 public class JmxProperties {
 
+	/**
+	 * Whether exporting of metrics to this backend is enabled.
+	 */
+	private boolean enabled = true;
+
 	/**
 	 * Metrics JMX domain name.
 	 */
@@ -57,4 +62,12 @@ public void setStep(Duration step) {
 		this.step = step;
 	}
 
+	public boolean isEnabled() {
+		return this.enabled;
+	}
+
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
+
 }

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

@@ -36,6 +36,11 @@
 @ConfigurationProperties(prefix = "management.prometheus.metrics.export")
 public class PrometheusProperties {
 
+	/**
+	 * Whether exporting of metrics to this backend is enabled.
+	 */
+	private boolean enabled = true;
+
 	/**
 	 * Whether to enable publishing descriptions as part of the scrape payload to
 	 * Prometheus. Turn this off to minimize the amount of data sent on each scrape.
@@ -86,6 +91,14 @@ public Pushgateway getPushgateway() {
 		return this.pushgateway;
 	}
 
+	public boolean isEnabled() {
+		return this.enabled;
+	}
+
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
+
 	/**
 	 * Configuration options for push-based interaction with Prometheus.
 	 */

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

@@ -34,6 +34,11 @@
 @ConfigurationProperties(prefix = "management.simple.metrics.export")
 public class SimpleProperties {
 
+	/**
+	 * Whether exporting of metrics to this backend is enabled.
+	 */
+	private boolean enabled = true;
+
 	/**
 	 * Step size (i.e. reporting frequency) to use.
 	 */
@@ -60,4 +65,12 @@ public void setMode(CountingMode mode) {
 		this.mode = mode;
 	}
 
+	public boolean isEnabled() {
+		return this.enabled;
+	}
+
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
+
 }