Change micrometer properties to use adapters

Update configuration property classes used with micrometer so that
they no longer directly implement `Config` interfaces. Properties
are now adapted to Config implementations independently.

See gh-9970

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/PropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export;
+
+import java.util.function.Function;
+
+import org.springframework.util.Assert;
+
+/**
+ * Base class for properties to config adapters.
+ *
+ * @param <T> The properties type
+ * @param <C> The config type
+ * @author Phillip Webb
+ * @since 2.0.0
+ */
+public class PropertiesConfigAdapter<T, C> {
+
+	private T properties;
+
+	private C defaults;
+
+	/**
+	 * Create a new {@link PropertiesConfigAdapter} instance.
+	 * @param properties the source properties
+	 * @param defaults a config implementation providing default values
+	 */
+	public PropertiesConfigAdapter(T properties, C defaults) {
+		Assert.notNull(properties, "Properties must not be null");
+		Assert.notNull(defaults, "Defaults must not be null");
+		this.properties = properties;
+		this.defaults = defaults;
+	}
+
+	/**
+	 * Get the value from the properties or use a fallback from the {@code defaults}.
+	 * @param getter the getter for the properties
+	 * @param fallback the fallback method from the {@code defaults}
+	 * @param <V> the value type
+	 * @return the property or fallback value
+	 */
+	protected final <V> V get(Function<T, V> getter, Function<C, V> fallback) {
+		V value = getter.apply(this.properties);
+		return (value != null ? value : fallback.apply(this.defaults));
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/StepRegistryProperties.java

@@ -18,41 +18,93 @@ package org.springframework.boot.actuate.autoconfigure.metrics.export;
 
 import java.time.Duration;
 
-import io.micrometer.core.instrument.spectator.step.StepRegistryConfig;
-
 /**
- * Specialization of {@link RegistryProperties} for configuring a metrics registry that
- * pushes aggregated metrics on a regular interval.
+ * Base class for properties that configure a metrics registry that pushes aggregated
+ * metrics on a regular interval.
  *
  * @author Jon Schneider
  * @author Andy Wilkinson
  * @since 2.0.0
  */
-public abstract class StepRegistryProperties extends RegistryProperties
-		implements StepRegistryConfig {
+public abstract class StepRegistryProperties {
+
+	/**
+	 * The step size (reporting frequency) to use.
+	 */
+	private Duration step = Duration.ofMinutes(1);
+
+	/**
+	 * Enable publishing to the backend.
+	 */
+	private Boolean enabled = true;
+
+	/**
+	 * The connection timeout for requests to the backend.
+	 */
+	private Duration connectTimeout;
+
+	/**
+	 * The read timeout for requests to the backend.
+	 */
+	private Duration readTimeout;
+
+	/**
+	 * The number of threads to use with the metrics publishing scheduler.
+	 */
+	private Integer numThreads;
+
+	/**
+	 * The number of measurements per request to use for the backend. If more measurements
+	 * are found, then multiple requests will be made.
+	 */
+	private Integer batchSize;
+
+	public Duration getStep() {
+		return this.step;
+	}
 
 	public void setStep(Duration step) {
-		set("step", step);
+		this.step = step;
+	}
+
+	public Boolean getEnabled() {
+		return this.enabled;
 	}
 
 	public void setEnabled(Boolean enabled) {
-		set("enabled", enabled);
+		this.enabled = enabled;
 	}
 
-	public void setBatchSize(Integer batchSize) {
-		set("batchSize", batchSize);
+	public Duration getConnectTimeout() {
+		return this.connectTimeout;
 	}
 
 	public void setConnectTimeout(Duration connectTimeout) {
-		set("connectTimeout", connectTimeout);
+		this.connectTimeout = connectTimeout;
+	}
+
+	public Duration getReadTimeout() {
+		return this.readTimeout;
 	}
 
 	public void setReadTimeout(Duration readTimeout) {
-		set("readTimeout", readTimeout);
+		this.readTimeout = readTimeout;
+	}
+
+	public Integer getNumThreads() {
+		return this.numThreads;
 	}
 
 	public void setNumThreads(Integer numThreads) {
-		set("numThreads", numThreads);
+		this.numThreads = numThreads;
+	}
+
+	public Integer getBatchSize() {
+		return this.batchSize;
+	}
+
+	public void setBatchSize(Integer batchSize) {
+		this.batchSize = batchSize;
 	}
 
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/StepRegistryPropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export;
+
+import java.time.Duration;
+
+import io.micrometer.core.instrument.spectator.step.StepRegistryConfig;
+
+/**
+ * Base class for {@link StepRegistryProperties} to {@link StepRegistryConfig} adapters.
+ *
+ * @param <T> The properties type
+ * @param <C> The config type
+ * @author Jon Schneider
+ * @author Phillip Webb
+ * @since 2.0.0
+ */
+public abstract class StepRegistryPropertiesConfigAdapter<T extends StepRegistryProperties, C extends StepRegistryConfig>
+		extends PropertiesConfigAdapter<T, C> implements StepRegistryConfig {
+
+	public StepRegistryPropertiesConfigAdapter(T properties, C defaults) {
+		super(properties, defaults);
+	}
+
+	@Override
+	public String prefix() {
+		return null;
+	}
+
+	@Override
+	public String get(String k) {
+		return null;
+	}
+
+	@Override
+	public Duration step() {
+		return get(T::getStep, C::step);
+	}
+
+	@Override
+	public boolean enabled() {
+		return get(T::getEnabled, C::enabled);
+	}
+
+	@Override
+	public Duration connectTimeout() {
+		return get(T::getConnectTimeout, C::connectTimeout);
+	}
+
+	@Override
+	public Duration readTimeout() {
+		return get(T::getReadTimeout, C::readTimeout);
+	}
+
+	@Override
+	public int numThreads() {
+		return get(T::getNumThreads, C::numThreads);
+	}
+
+	@Override
+	public int batchSize() {
+		return get(T::getBatchSize, C::batchSize);
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/atlas/AtlasExportConfiguration.java

@@ -43,10 +43,16 @@ import org.springframework.context.annotation.Import;
 @EnableConfigurationProperties(AtlasProperties.class)
 public class AtlasExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean(AtlasConfig.class)
+	public AtlasConfig atlasConfig(AtlasProperties atlasProperties) {
+		return new AtlasPropertiesConfigAdapter(atlasProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.atlas.enabled", matchIfMissing = true)
-	public MetricsExporter atlasExporter(AtlasConfig config, Clock clock) {
-		return () -> new AtlasMeterRegistry(config, clock);
+	public MetricsExporter atlasExporter(AtlasConfig atlasConfig, Clock clock) {
+		return () -> new AtlasMeterRegistry(atlasConfig, clock);
 	}
 
 	@Bean

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/atlas/AtlasProperties.java

@@ -18,9 +18,7 @@ package org.springframework.boot.actuate.autoconfigure.metrics.export.atlas;
 
 import java.time.Duration;
 
-import com.netflix.spectator.atlas.AtlasConfig;
-
-import org.springframework.boot.actuate.autoconfigure.metrics.export.RegistryProperties;
+import org.springframework.boot.actuate.autoconfigure.metrics.export.StepRegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
@@ -30,63 +28,97 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @author Jon Schneider
  */
 @ConfigurationProperties(prefix = "spring.metrics.atlas")
-public class AtlasProperties extends RegistryProperties implements AtlasConfig {
-
-	@Override
-	protected String prefix() {
-		return "spring.metrics.atlas";
+public class AtlasProperties extends StepRegistryProperties {
+
+	/**
+	 * The URI for the Atlas backend.
+	 */
+	private String uri;
+
+	/**
+	 * The TTL for meters that do not have any activity. After this period the meter will
+	 * be considered expired and will not get reported.
+	 */
+	private Duration meterTimeToLive;
+
+	/**
+	 * Enable streaming to Atlas LWC.
+	 */
+	private Boolean lwcEnabled;
+
+	/**
+	 * The frequency for refreshing config settings from the LWC service.
+	 */
+	private Duration configRefreshFrequency;
+
+	/**
+	 * The TTL for subscriptions from the LWC service.
+	 */
+	private Duration configTimeToLive;
+
+	/**
+	 * The URI for the Atlas LWC endpoint to retrieve current subscriptions.
+	 */
+	private String configUri;
+
+	/**
+	 * The URI for the Atlas LWC endpoint to evaluate the data for a subscription.
+	 */
+	private String evalUri;
+
+	public String getUri() {
+		return this.uri;
 	}
 
-	public void setStep(Duration step) {
-		set("step", step);
+	public void setUri(String uri) {
+		this.uri = uri;
 	}
 
-	public void setMeterTTL(Duration meterTTL) {
-		set("meterTTL", meterTTL);
+	public Duration getMeterTimeToLive() {
+		return this.meterTimeToLive;
 	}
 
-	public void setEnabled(Boolean enabled) {
-		set("enabled", enabled);
+	public void setMeterTimeToLive(Duration meterTimeToLive) {
+		this.meterTimeToLive = meterTimeToLive;
 	}
 
-	public void setNumThreads(Integer numThreads) {
-		set("numThreads", numThreads);
+	public Boolean getLwcEnabled() {
+		return this.lwcEnabled;
 	}
 
-	public void setUri(String uri) {
-		set("uri", uri);
+	public void setLwcEnabled(Boolean lwcEnabled) {
+		this.lwcEnabled = lwcEnabled;
 	}
 
-	public void setLwcEnabled(boolean lwcEnabled) {
-		set("lwcEnabled", lwcEnabled);
+	public Duration getConfigRefreshFrequency() {
+		return this.configRefreshFrequency;
 	}
 
 	public void setConfigRefreshFrequency(Duration configRefreshFrequency) {
-		set("configRefreshFrequency", configRefreshFrequency);
+		this.configRefreshFrequency = configRefreshFrequency;
 	}
 
-	public void setConfigTTL(Duration configTTL) {
-		set("configTTL", configTTL);
+	public Duration getConfigTimeToLive() {
+		return this.configTimeToLive;
 	}
 
-	public void setConfigUri(String configUri) {
-		set("configUri", configUri);
+	public void setConfigTimeToLive(Duration configTimeToLive) {
+		this.configTimeToLive = configTimeToLive;
 	}
 
-	public void setEvalUri(String evalUri) {
-		set("evalUri", evalUri);
+	public String getConfigUri() {
+		return this.configUri;
 	}
 
-	public void setConnectTimeout(Duration connectTimeout) {
-		set("connectTimeout", connectTimeout);
+	public void setConfigUri(String configUri) {
+		this.configUri = configUri;
 	}
 
-	public void setReadTimeout(Duration readTimeout) {
-		set("readTimeout", readTimeout);
+	public String getEvalUri() {
+		return this.evalUri;
 	}
 
-	public void setBatchSize(Integer batchSize) {
-		set("batchSize", batchSize);
+	public void setEvalUri(String evalUri) {
+		this.evalUri = evalUri;
 	}
-
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/atlas/AtlasPropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export.atlas;
+
+import java.time.Duration;
+
+import com.netflix.spectator.atlas.AtlasConfig;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.PropertiesConfigAdapter;
+
+/**
+ * Adapter to convert {@link AtlasProperties} to an {@link AtlasConfig}.
+ *
+ * @author Jon Schneider
+ * @author Phillip Webb
+ */
+class AtlasPropertiesConfigAdapter extends
+		PropertiesConfigAdapter<AtlasProperties, AtlasConfig> implements AtlasConfig {
+
+	private static final AtlasConfig DEFAUTLS = (k) -> null;
+
+	AtlasPropertiesConfigAdapter(AtlasProperties properties) {
+		super(properties, DEFAUTLS);
+	}
+
+	@Override
+	public String get(String key) {
+		return null;
+	}
+
+	@Override
+	public Duration step() {
+		return get(AtlasProperties::getStep, AtlasConfig::step);
+	}
+
+	@Override
+	public boolean enabled() {
+		return get(AtlasProperties::getEnabled, AtlasConfig::enabled);
+	}
+
+	@Override
+	public Duration connectTimeout() {
+		return get(AtlasProperties::getConnectTimeout, AtlasConfig::connectTimeout);
+	}
+
+	@Override
+	public Duration readTimeout() {
+		return get(AtlasProperties::getReadTimeout, AtlasConfig::readTimeout);
+	}
+
+	@Override
+	public int numThreads() {
+		return get(AtlasProperties::getNumThreads, AtlasConfig::numThreads);
+	}
+
+	@Override
+	public int batchSize() {
+		return get(AtlasProperties::getBatchSize, AtlasConfig::batchSize);
+	}
+
+	@Override
+	public String uri() {
+		return get(AtlasProperties::getUri, AtlasConfig::uri);
+	}
+
+	@Override
+	public Duration meterTTL() {
+		return get(AtlasProperties::getMeterTimeToLive, AtlasConfig::meterTTL);
+	}
+
+	@Override
+	public boolean lwcEnabled() {
+		return get(AtlasProperties::getLwcEnabled, AtlasConfig::lwcEnabled);
+	}
+
+	@Override
+	public Duration configRefreshFrequency() {
+		return get(AtlasProperties::getConfigRefreshFrequency,
+				AtlasConfig::configRefreshFrequency);
+	}
+
+	@Override
+	public Duration configTTL() {
+		return get(AtlasProperties::getConfigTimeToLive, AtlasConfig::configTTL);
+	}
+
+	@Override
+	public String configUri() {
+		return get(AtlasProperties::getConfigUri, AtlasConfig::configUri);
+	}
+
+	@Override
+	public String evalUri() {
+		return get(AtlasProperties::getEvalUri, AtlasConfig::evalUri);
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/datadog/DatadogExportConfiguration.java

@@ -38,14 +38,21 @@ import org.springframework.context.annotation.Import;
  */
 @Configuration
 @ConditionalOnClass(DatadogMeterRegistry.class)
+@ConditionalOnProperty("spring.metrics.datadog.api-key")
 @Import(StringToDurationConverter.class)
 @EnableConfigurationProperties(DatadogProperties.class)
 public class DatadogExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean
+	public DatadogConfig datadogConfig(DatadogProperties datadogProperties) {
+		return new DatadogPropertiesConfigAdapter(datadogProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.datadog.enabled", matchIfMissing = true)
-	public MetricsExporter datadogExporter(DatadogConfig config, Clock clock) {
-		return () -> new DatadogMeterRegistry(config, clock);
+	public MetricsExporter datadogExporter(DatadogConfig datadogConfig, Clock clock) {
+		return () -> new DatadogMeterRegistry(datadogConfig, clock);
 	}
 
 	@Bean

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/datadog/DatadogProperties.java

@@ -16,7 +16,7 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics.export.datadog;
 
-import io.micrometer.datadog.DatadogConfig;
+import java.time.Duration;
 
 import org.springframework.boot.actuate.autoconfigure.metrics.export.StepRegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
@@ -28,23 +28,63 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties(prefix = "spring.metrics.datadog")
-public class DatadogProperties extends StepRegistryProperties implements DatadogConfig {
+public class DatadogProperties extends StepRegistryProperties {
 
-	@Override
-	public String prefix() {
-		return "spring.metrics.datadog";
-	}
+	/**
+	 * Your API key, found in your account settings at datadoghq. This property is
+	 * required.
+	 */
+	private String apiKey;
+
+	/**
+	 * The tag that will be mapped to "host" when shipping metrics to datadog, or
+	 * {@code null} if host should be omitted on publishing.
+	 */
+	private String hostTag;
+
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some max value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMax = Duration.ofMinutes(2);
+
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some min value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMin = Duration.ofMillis(10);
 
-	public DatadogProperties() {
-		set("apiKey", "dummyKey"); // FIXME otherwise tests fail
+	public String getApiKey() {
+		return this.apiKey;
 	}
 
 	public void setApiKey(String apiKey) {
-		set("apiKey", apiKey);
+		this.apiKey = apiKey;
 	}
 
-	public void setHostTag(String hostTag) {
-		set("hostTag", hostTag);
+	public String getHostTag() {
+		return this.hostTag;
 	}
 
+	public void setHostKey(String hostKey) {
+		this.hostTag = hostKey;
+	}
+
+	public Duration getTimerPercentilesMax() {
+		return this.timerPercentilesMax;
+	}
+
+	public void setTimerPercentilesMax(Duration timerPercentilesMax) {
+		this.timerPercentilesMax = timerPercentilesMax;
+	}
+
+	public Duration getTimerPercentilesMin() {
+		return this.timerPercentilesMin;
+	}
+
+	public void setTimerPercentilesMin(Duration timerPercentilesMin) {
+		this.timerPercentilesMin = timerPercentilesMin;
+	}
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/datadog/DatadogPropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export.datadog;
+
+import java.time.Duration;
+
+import io.micrometer.datadog.DatadogConfig;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.StepRegistryPropertiesConfigAdapter;
+
+/**
+ * Adapter to convert {@link DatadogProperties} to a {@link DatadogConfig}.
+ *
+ * @author Jon Schneider
+ * @author Phillip Webb
+ */
+class DatadogPropertiesConfigAdapter
+		extends StepRegistryPropertiesConfigAdapter<DatadogProperties, DatadogConfig>
+		implements DatadogConfig {
+
+	private static final DatadogConfig DEFAULTS = (k) -> null;
+
+	DatadogPropertiesConfigAdapter(DatadogProperties properties) {
+		super(properties, DEFAULTS);
+	}
+
+	@Override
+	public String apiKey() {
+		return get(DatadogProperties::getApiKey, DatadogConfig::apiKey);
+	}
+
+	@Override
+	public String hostTag() {
+		return get(DatadogProperties::getHostTag, DatadogConfig::hostTag);
+	}
+
+	@Override
+	public Duration timerPercentilesMax() {
+		return get(DatadogProperties::getTimerPercentilesMax,
+				DatadogConfig::timerPercentilesMax);
+	}
+
+	@Override
+	public Duration timerPercentilesMin() {
+		return get(DatadogProperties::getTimerPercentilesMin,
+				DatadogConfig::timerPercentilesMin);
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/ganglia/GangliaExportConfiguration.java

@@ -43,11 +43,17 @@ import org.springframework.context.annotation.Import;
 @EnableConfigurationProperties(GangliaProperties.class)
 public class GangliaExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean
+	public GangliaConfig gangliaConfig(GangliaProperties gangliaProperties) {
+		return new GangliaPropertiesConfigAdapter(gangliaProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.ganglia.enabled", matchIfMissing = true)
-	public MetricsExporter gangliaExporter(GangliaConfig config,
+	public MetricsExporter gangliaExporter(GangliaConfig gangliaConfig,
 			HierarchicalNameMapper nameMapper, Clock clock) {
-		return () -> new GangliaMeterRegistry(config, nameMapper, clock);
+		return () -> new GangliaMeterRegistry(gangliaConfig, nameMapper, clock);
 	}
 
 	@Bean

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/ganglia/GangliaProperties.java

@@ -20,9 +20,7 @@ import java.time.Duration;
 import java.util.concurrent.TimeUnit;
 
 import info.ganglia.gmetric4j.gmetric.GMetric;
-import io.micrometer.ganglia.GangliaConfig;
 
-import org.springframework.boot.actuate.autoconfigure.metrics.export.RegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
@@ -32,47 +30,123 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties(prefix = "spring.metrics.ganglia")
-public class GangliaProperties extends RegistryProperties implements GangliaConfig {
+public class GangliaProperties {
+
+	/**
+	 * Enable publishing to the backend.
+	 */
+	private Boolean enabled = true;
+
+	/**
+	 * The step size (reporting frequency) to use.
+	 */
+	private Duration step = Duration.ofMinutes(1);
+
+	/**
+	 * The base time unit used to report rates.
+	 */
+	private TimeUnit rateUnits;
+
+	/**
+	 * The base time unit used to report durations.
+	 */
+	private TimeUnit durationUnits;
+
+	/**
+	 * Ganglia protocol version. Must be either 3.1 or 3.0.
+	 */
+	private String protocolVersion;
+
+	/**
+	 * The UDP addressing mode, either unicast or multicast.
+	 */
+	private GMetric.UDPAddressingMode addressingMode;
+
+	/**
+	 * The TTL for metrics on Ganglia.
+	 */
+	private Integer timeToLive;
+
+	/**
+	 * Ganglia host used for publishing.
+	 */
+	private String host;
+
+	/**
+	 * Ganglia port used for publishing.
+	 */
+	private Integer port;
+
+	public Boolean getEnabled() {
+		return this.enabled;
+	}
 
-	@Override
-	public String prefix() {
-		return "spring.metrics.ganglia";
+	public void setEnabled(Boolean enabled) {
+		this.enabled = enabled;
+	}
+
+	public Duration getStep() {
+		return this.step;
 	}
 
 	public void setStep(Duration step) {
-		set("step", step);
+		this.step = step;
+	}
+
+	public TimeUnit getRateUnits() {
+		return this.rateUnits;
 	}
 
 	public void setRateUnits(TimeUnit rateUnits) {
-		set("rateUnits", rateUnits);
+		this.rateUnits = rateUnits;
+	}
+
+	public TimeUnit getDurationUnits() {
+		return this.durationUnits;
 	}
 
 	public void setDurationUnits(TimeUnit durationUnits) {
-		set("durationUnits", durationUnits);
+		this.durationUnits = durationUnits;
+	}
+
+	public String getProtocolVersion() {
+		return this.protocolVersion;
 	}
 
 	public void setProtocolVersion(String protocolVersion) {
-		set("protocolVersion", protocolVersion);
+		this.protocolVersion = protocolVersion;
+	}
+
+	public GMetric.UDPAddressingMode getAddressingMode() {
+		return this.addressingMode;
 	}
 
 	public void setAddressingMode(GMetric.UDPAddressingMode addressingMode) {
-		set("addressingMode", addressingMode);
+		this.addressingMode = addressingMode;
 	}
 
-	public void setTtl(Integer ttl) {
-		set("ttl", ttl);
+	public Integer getTimeToLive() {
+		return this.timeToLive;
+	}
+
+	public void setTimeToLive(Integer timeToLive) {
+		this.timeToLive = timeToLive;
+	}
+
+	public String getHost() {
+		return this.host;
 	}
 
 	public void setHost(String host) {
-		set("host", host);
+		this.host = host;
 	}
 
-	public void setPort(Integer port) {
-		set("port", port);
+	public Integer getPort() {
+		return this.port;
 	}
 
-	public void setEnabled(Boolean enabled) {
-		set("enabled", enabled);
+	public void setPort(Integer port) {
+		this.port = port;
 	}
 
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/ganglia/GangliaPropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export.ganglia;
+
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+
+import info.ganglia.gmetric4j.gmetric.GMetric;
+import io.micrometer.ganglia.GangliaConfig;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.PropertiesConfigAdapter;
+
+/**
+ * Adapter to convert {@link GangliaProperties} to a {@link GangliaConfig}.
+ *
+ * @author Jon Schneider
+ * @author Phillip Webb
+ */
+class GangliaPropertiesConfigAdapter
+		extends PropertiesConfigAdapter<GangliaProperties, GangliaConfig>
+		implements GangliaConfig {
+
+	private static final GangliaConfig DEFAULTS = (k) -> null;
+
+	GangliaPropertiesConfigAdapter(GangliaProperties properties) {
+		super(properties, DEFAULTS);
+	}
+
+	@Override
+	public String get(String k) {
+		return null;
+	}
+
+	@Override
+	public boolean enabled() {
+		return get(GangliaProperties::getEnabled, GangliaConfig::enabled);
+	}
+
+	@Override
+	public Duration step() {
+		return get(GangliaProperties::getStep, GangliaConfig::step);
+	}
+
+	@Override
+	public TimeUnit rateUnits() {
+		return get(GangliaProperties::getRateUnits, GangliaConfig::rateUnits);
+	}
+
+	@Override
+	public TimeUnit durationUnits() {
+		return get(GangliaProperties::getDurationUnits, GangliaConfig::durationUnits);
+	}
+
+	@Override
+	public String protocolVersion() {
+		return get(GangliaProperties::getProtocolVersion, GangliaConfig::protocolVersion);
+	}
+
+	@Override
+	public GMetric.UDPAddressingMode addressingMode() {
+		return get(GangliaProperties::getAddressingMode, GangliaConfig::addressingMode);
+	}
+
+	@Override
+	public int ttl() {
+		return get(GangliaProperties::getTimeToLive, GangliaConfig::ttl);
+	}
+
+	@Override
+	public String host() {
+		return get(GangliaProperties::getHost, GangliaConfig::host);
+	}
+
+	@Override
+	public int port() {
+		return get(GangliaProperties::getPort, GangliaConfig::port);
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/graphite/GraphiteExportConfiguration.java

@@ -43,11 +43,17 @@ import org.springframework.context.annotation.Import;
 @EnableConfigurationProperties(GraphiteProperties.class)
 public class GraphiteExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean
+	public GraphiteConfig graphiteConfig(GraphiteProperties graphiteProperties) {
+		return new GraphitePropertiesConfigAdapter(graphiteProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.graphite.enabled", matchIfMissing = true)
-	public MetricsExporter graphiteExporter(GraphiteConfig config,
+	public MetricsExporter graphiteExporter(GraphiteConfig graphiteConfig,
 			HierarchicalNameMapper nameMapper, Clock clock) {
-		return () -> new GraphiteMeterRegistry(config, nameMapper, clock);
+		return () -> new GraphiteMeterRegistry(graphiteConfig, nameMapper, clock);
 	}
 
 	@Bean

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/graphite/GraphiteProperties.java

@@ -19,9 +19,6 @@ package org.springframework.boot.actuate.autoconfigure.metrics.export.graphite;
 import java.time.Duration;
 import java.util.concurrent.TimeUnit;
 
-import io.micrometer.graphite.GraphiteConfig;
-
-import org.springframework.boot.actuate.autoconfigure.metrics.export.RegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
@@ -31,35 +28,82 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties(prefix = "spring.metrics.graphite")
-public class GraphiteProperties extends RegistryProperties implements GraphiteConfig {
+public class GraphiteProperties {
+	/**
+	 * Enable publishing to the backend.
+	 */
+	private Boolean enabled = true;
+
+	/**
+	 * The step size (reporting frequency) to use.
+	 */
+	private Duration step = Duration.ofMinutes(1);
+
+	/**
+	 * The base time unit used to report rates.
+	 */
+	private TimeUnit rateUnits;
+
+	/**
+	 * The base time unit used to report durations.
+	 */
+	private TimeUnit durationUnits;
+
+	/**
+	 * Graphite host used for publishing.
+	 */
+	private String host;
+
+	/**
+	 * Graphite port used for publishing.
+	 */
+	private Integer port;
+
+	public Boolean getEnabled() {
+		return this.enabled;
+	}
+
+	public void setEnabled(Boolean enabled) {
+		this.enabled = enabled;
+	}
 
-	@Override
-	public String prefix() {
-		return "spring.metrics.graphite";
+	public Duration getStep() {
+		return this.step;
 	}
 
 	public void setStep(Duration step) {
-		set("step", step);
+		this.step = step;
+	}
+
+	public TimeUnit getRateUnits() {
+		return this.rateUnits;
 	}
 
 	public void setRateUnits(TimeUnit rateUnits) {
-		set("rateUnits", rateUnits);
+		this.rateUnits = rateUnits;
+	}
+
+	public TimeUnit getDurationUnits() {
+		return this.durationUnits;
 	}
 
 	public void setDurationUnits(TimeUnit durationUnits) {
-		set("durationUnits", durationUnits);
+		this.durationUnits = durationUnits;
 	}
 
-	public void setHost(String host) {
-		set("host", host);
+	public String getHost() {
+		return this.host;
 	}
 
-	public void setPort(Integer port) {
-		set("port", port);
+	public void setHost(String host) {
+		this.host = host;
 	}
 
-	public void setEnabled(Boolean enabled) {
-		set("enabled", enabled);
+	public Integer getPort() {
+		return this.port;
 	}
 
+	public void setPort(Integer port) {
+		this.port = port;
+	}
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/graphite/GraphitePropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export.graphite;
+
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+
+import io.micrometer.graphite.GraphiteConfig;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.PropertiesConfigAdapter;
+
+/**
+ * Adapter to convert {@link GraphiteProperties} to a {@link GraphiteConfig}.
+ *
+ * @author Jon Schneider
+ * @author Phillip Webb
+ */
+class GraphitePropertiesConfigAdapter
+		extends PropertiesConfigAdapter<GraphiteProperties, GraphiteConfig>
+		implements GraphiteConfig {
+
+	private static final GraphiteConfig DEFAULTS = (k) -> null;
+
+	GraphitePropertiesConfigAdapter(GraphiteProperties properties) {
+		super(properties, DEFAULTS);
+	}
+
+	@Override
+	public String get(String k) {
+		return null;
+	}
+
+	@Override
+	public boolean enabled() {
+		return get(GraphiteProperties::getEnabled, GraphiteConfig::enabled);
+	}
+
+	@Override
+	public Duration step() {
+		return get(GraphiteProperties::getStep, GraphiteConfig::step);
+	}
+
+	@Override
+	public TimeUnit rateUnits() {
+		return get(GraphiteProperties::getRateUnits, GraphiteConfig::rateUnits);
+	}
+
+	@Override
+	public TimeUnit durationUnits() {
+		return get(GraphiteProperties::getDurationUnits, GraphiteConfig::durationUnits);
+	}
+
+	@Override
+	public String host() {
+		return get(GraphiteProperties::getHost, GraphiteConfig::host);
+	}
+
+	@Override
+	public int port() {
+		return get(GraphiteProperties::getPort, GraphiteConfig::port);
+	}
+
+}

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/influx/InfluxExportConfiguration.java

@@ -42,10 +42,16 @@ import org.springframework.context.annotation.Import;
 @EnableConfigurationProperties(InfluxProperties.class)
 public class InfluxExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean(InfluxConfig.class)
+	public InfluxConfig influxConfig(InfluxProperties influxProperties) {
+		return new InfluxPropertiesConfigAdapter(influxProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.influx.enabled", matchIfMissing = true)
-	public MetricsExporter influxExporter(InfluxConfig config, Clock clock) {
-		return () -> new InfluxMeterRegistry(config, clock);
+	public MetricsExporter influxExporter(InfluxConfig influxConfig, Clock clock) {
+		return () -> new InfluxMeterRegistry(influxConfig, clock);
 	}
 
 	@Bean

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/influx/InfluxProperties.java

@@ -16,7 +16,8 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics.export.influx;
 
-import io.micrometer.influx.InfluxConfig;
+import java.time.Duration;
+
 import io.micrometer.influx.InfluxConsistency;
 
 import org.springframework.boot.actuate.autoconfigure.metrics.export.StepRegistryProperties;
@@ -29,39 +30,127 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties(prefix = "spring.metrics.influx")
-public class InfluxProperties extends StepRegistryProperties implements InfluxConfig {
+public class InfluxProperties extends StepRegistryProperties {
+	/**
+	 * The tag that will be mapped to "host" when shipping metrics to Influx, or
+	 * {@code null} if host should be omitted on publishing.
+	 */
+	private String db;
+
+	/**
+	 * The write consistency for each point.
+	 */
+	private InfluxConsistency consistency;
+
+	/**
+	 * Authenticate requests with this user. If not specified, the registry will not
+	 * attempt to present credentials to Influx.
+	 */
+	private String userName;
+
+	/**
+	 * Authenticate requests with this password.
+	 */
+	private String password;
+
+	/**
+	 * Influx writes to the DEFAULT retention policy if one is not specified.
+	 */
+	private String retentionPolicy;
+
+	/**
+	 * The URI for the Influx backend.
+	 */
+	private String uri;
+
+	/**
+	 * Enable GZIP compression of metrics batches published to Influx.
+	 */
+	private Boolean compressed;
 
-	@Override
-	public String prefix() {
-		return "spring.metrics.influx";
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some max value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMax = Duration.ofMinutes(2);
+
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some min value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMin = Duration.ofMillis(10);
+
+	public String getDb() {
+		return this.db;
 	}
 
 	public void setDb(String db) {
-		set("db", db);
+		this.db = db;
+	}
+
+	public InfluxConsistency getConsistency() {
+		return this.consistency;
 	}
 
 	public void setConsistency(InfluxConsistency consistency) {
-		set("consistency", consistency);
+		this.consistency = consistency;
+	}
+
+	public String getUserName() {
+		return this.userName;
 	}
 
 	public void setUserName(String userName) {
-		set("userName", userName);
+		this.userName = userName;
+	}
+
+	public String getPassword() {
+		return this.password;
 	}
 
 	public void setPassword(String password) {
-		set("password", password);
+		this.password = password;
+	}
+
+	public String getRetentionPolicy() {
+		return this.retentionPolicy;
 	}
 
 	public void setRetentionPolicy(String retentionPolicy) {
-		set("retentionPolicy", retentionPolicy);
+		this.retentionPolicy = retentionPolicy;
+	}
+
+	public String getUri() {
+		return this.uri;
 	}
 
 	public void setUri(String uri) {
-		set("uri", uri);
+		this.uri = uri;
+	}
+
+	public Boolean getCompressed() {
+		return this.compressed;
 	}
 
 	public void setCompressed(Boolean compressed) {
-		set("compressed", compressed);
+		this.compressed = compressed;
 	}
 
+	public Duration getTimerPercentilesMax() {
+		return this.timerPercentilesMax;
+	}
+
+	public void setTimerPercentilesMax(Duration timerPercentilesMax) {
+		this.timerPercentilesMax = timerPercentilesMax;
+	}
+
+	public Duration getTimerPercentilesMin() {
+		return this.timerPercentilesMin;
+	}
+
+	public void setTimerPercentilesMin(Duration timerPercentilesMin) {
+		this.timerPercentilesMin = timerPercentilesMin;
+	}
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/influx/InfluxPropertiesConfigAdapter.java

+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.export.influx;
+
+import java.time.Duration;
+
+import io.micrometer.influx.InfluxConfig;
+import io.micrometer.influx.InfluxConsistency;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.StepRegistryPropertiesConfigAdapter;
+
+/**
+ * Adapter to convert {@link InfluxProperties} to an {@link InfluxConfig}.
+ *
+ * @author Jon Schneider
+ * @author Phillip Webb
+ */
+class InfluxPropertiesConfigAdapter
+		extends StepRegistryPropertiesConfigAdapter<InfluxProperties, InfluxConfig>
+		implements InfluxConfig {
+
+	private static final InfluxConfig DEFAULTS = (k) -> null;
+
+	InfluxPropertiesConfigAdapter(InfluxProperties properties) {
+		super(properties, DEFAULTS);
+	}
+
+	@Override
+	public String db() {
+		return get(InfluxProperties::getDb, InfluxConfig::db);
+	}
+
+	@Override
+	public InfluxConsistency consistency() {
+		return get(InfluxProperties::getConsistency, InfluxConfig::consistency);
+	}
+
+	@Override
+	public String userName() {
+		return get(InfluxProperties::getUserName, InfluxConfig::userName);
+	}
+
+	@Override
+	public String password() {
+		return get(InfluxProperties::getPassword, InfluxConfig::password);
+	}
+
+	@Override
+	public String retentionPolicy() {
+		return get(InfluxProperties::getRetentionPolicy, InfluxConfig::retentionPolicy);
+	}
+
+	@Override
+	public String uri() {
+		return get(InfluxProperties::getUri, InfluxConfig::uri);
+	}
+
+	@Override
+	public boolean compressed() {
+		return get(InfluxProperties::getCompressed, InfluxConfig::compressed);
+	}
+
+	@Override
+	public Duration timerPercentilesMax() {
+		return get(InfluxProperties::getTimerPercentilesMax,
+				InfluxConfig::timerPercentilesMax);
+	}
+
+	@Override
+	public Duration timerPercentilesMin() {
+		return get(InfluxProperties::getTimerPercentilesMin,
+				InfluxConfig::timerPercentilesMin);
+	}
+
+}

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

@@ -42,11 +42,18 @@ import org.springframework.context.annotation.Configuration;
 @EnableConfigurationProperties(PrometheusProperties.class)
 public class PrometheusExportConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean
+	public PrometheusConfig prometheusConfig(PrometheusProperties prometheusProperties) {
+		return new PrometheusPropertiesConfigAdapter(prometheusProperties);
+	}
+
 	@Bean
 	@ConditionalOnProperty(value = "spring.metrics.prometheus.enabled", matchIfMissing = true)
-	public MetricsExporter prometheusExporter(PrometheusConfig config,
+	public MetricsExporter prometheusExporter(PrometheusConfig prometheusConfig,
 			CollectorRegistry collectorRegistry, Clock clock) {
-		return () -> new PrometheusMeterRegistry(config, collectorRegistry, clock);
+		return () -> new PrometheusMeterRegistry(prometheusConfig, collectorRegistry,
+				clock);
 	}
 
 	@Bean

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

@@ -16,9 +16,8 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus;
 
-import io.micrometer.prometheus.PrometheusConfig;
+import java.time.Duration;
 
-import org.springframework.boot.actuate.autoconfigure.metrics.export.RegistryProperties;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
@@ -28,25 +27,63 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties(prefix = "spring.metrics.prometheus")
-public class PrometheusProperties extends RegistryProperties implements PrometheusConfig {
+public class PrometheusProperties {
 
-	private boolean enabled = true;
+	/**
+	 * Enable publishing to Prometheus.
+	 */
+	private Boolean enabled = true;
 
-	public boolean isEnabled() {
+	/**
+	 * Enable publishing descriptions as part of the scrape payload to Prometheus. Turn
+	 * this off to minimize the amount of data sent on each scrape.
+	 */
+	private Boolean descriptions = true;
+
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some max value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMax = Duration.ofMinutes(2);
+
+	/**
+	 * The bucket filter clamping the bucket domain of timer percentiles histograms to
+	 * some min value. This is used to limit the number of buckets shipped to Prometheus
+	 * to save on storage.
+	 */
+	private Duration timerPercentilesMin = Duration.ofMillis(10);
+
+	public Boolean getEnabled() {
 		return this.enabled;
 	}
 
-	public void setEnabled(boolean enabled) {
+	public void setEnabled(Boolean enabled) {
 		this.enabled = enabled;
 	}
 
+	public Boolean getDescriptions() {
+		return this.descriptions;
+	}
+
 	public void setDescriptions(Boolean descriptions) {
-		set("descriptions", descriptions);
+		this.descriptions = descriptions;
+	}
+
+	public Duration getTimerPercentilesMax() {
+		return this.timerPercentilesMax;
+	}
+
+	public void setTimerPercentilesMax(Duration timerPercentilesMax) {
+		this.timerPercentilesMax = timerPercentilesMax;
+	}
+
+	public Duration getTimerPercentilesMin() {
+		return this.timerPercentilesMin;
 	}
 
-	@Override
-	public String prefix() {
-		return "spring.metrics.prometheus";
+	public void setTimerPercentilesMin(Duration timerPercentilesMin) {
+		this.timerPercentilesMin = timerPercentilesMin;
 	}
 
 }

spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/RegistryProperties.java → spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusPropertiesConfigAdapter.java

@@ -14,31 +14,50 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.actuate.autoconfigure.metrics.export;
+package org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus;
 
-import java.util.Properties;
+import java.time.Duration;
 
-import org.springframework.boot.context.properties.ConfigurationProperties;
+import io.micrometer.prometheus.PrometheusConfig;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.PropertiesConfigAdapter;
 
 /**
- * Base {@link ConfigurationProperties} class for configuring a metrics registry.
+ * Adapter to convert {@link PrometheusProperties} to a {@link PrometheusConfig}.
  *
  * @author Jon Schneider
- * @author Andy Wilkinson
- * @since 2.0.0
+ * @author Phillip Webb
  */
-public abstract class RegistryProperties {
+class PrometheusPropertiesConfigAdapter
+		extends PropertiesConfigAdapter<PrometheusProperties, PrometheusConfig>
+		implements PrometheusConfig {
 
-	private final Properties properties = new Properties();
+	private static final PrometheusConfig DEFAULTS = (key) -> null;
 
-	protected abstract String prefix();
+	PrometheusPropertiesConfigAdapter(PrometheusProperties properties) {
+		super(properties, DEFAULTS);
+	}
 
+	@Override
 	public String get(String key) {
-		return this.properties.getProperty(key);
+		return null;
+	}
+
+	@Override
+	public boolean descriptions() {
+		return get(PrometheusProperties::getDescriptions, PrometheusConfig::descriptions);
+	}
+
+	@Override
+	public Duration timerPercentilesMin() {
+		return get(PrometheusProperties::getTimerPercentilesMin,
+				PrometheusConfig::timerPercentilesMin);
 	}
 
-	protected void set(String key, Object value) {
-		this.properties.put(prefix() + "." + key, value.toString());
+	@Override
+	public Duration timerPercentilesMax() {
+		return get(PrometheusProperties::getTimerPercentilesMax,
+				PrometheusConfig::timerPercentilesMax);
 	}
 
 }