Merge pull request #21067 from jkschneider

* gh-21067:
  Polish "Update validation of Micrometer configuration"
  Update validation of Micrometer configuration

Closes gh-21067

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/MissingRequiredConfigurationFailureAnalyzer.java → spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/ValidationFailureAnalyzer.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -16,29 +16,29 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics;
 
-import io.micrometer.core.instrument.config.MissingRequiredConfigurationException;
+import io.micrometer.core.instrument.config.validate.Validated.Invalid;
+import io.micrometer.core.instrument.config.validate.ValidationException;
 
 import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
 import org.springframework.boot.diagnostics.FailureAnalysis;
 
 /**
  * An {@link AbstractFailureAnalyzer} that performs analysis of failures caused by a
- * {@link MissingRequiredConfigurationException}.
+ * {@link ValidationException}.
  *
  * @author Andy Wilkinson
  */
-class MissingRequiredConfigurationFailureAnalyzer
-		extends AbstractFailureAnalyzer<MissingRequiredConfigurationException> {
+class ValidationFailureAnalyzer extends AbstractFailureAnalyzer<ValidationException> {
 
 	@Override
-	protected FailureAnalysis analyze(Throwable rootFailure, MissingRequiredConfigurationException cause) {
-		StringBuilder description = new StringBuilder();
-		description.append(cause.getMessage());
-		if (!cause.getMessage().endsWith(".")) {
-			description.append(".");
+	protected FailureAnalysis analyze(Throwable rootFailure, ValidationException cause) {
+		StringBuilder description = new StringBuilder(String.format("Invalid Micrometer configuration detected:%n"));
+		for (Invalid<?> failure : cause.getValidation().failures()) {
+			description.append(String.format("%n  - management.metrics.export.%s was '%s' but it %s",
+					failure.getProperty(), failure.getValue(), failure.getMessage()));
 		}
 		return new FailureAnalysis(description.toString(),
-				"Update your application to provide the missing configuration.", cause);
+				"Update your application to correct the invalid configuration.", cause);
 	}
 
 }

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

@@ -62,17 +62,17 @@ public class ElasticProperties extends StepRegistryProperties {
 	/**
 	 * Login user of the Elastic server.
 	 */
-	private String userName = "";
+	private String userName;
 
 	/**
 	 * Login password of the Elastic server.
 	 */
-	private String password = "";
+	private String password;
 
 	/**
 	 * Ingest pipeline name. By default, events are not pre-processed.
 	 */
-	private String pipeline = "";
+	private String pipeline;
 
 	public String getHost() {
 		return this.host;

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

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -22,6 +22,7 @@ import java.util.concurrent.TimeUnit;
 import info.ganglia.gmetric4j.gmetric.GMetric;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.DeprecatedConfigurationProperty;
 
 /**
  * {@link ConfigurationProperties @ConfigurationProperties} for configuring Ganglia
@@ -47,7 +48,7 @@ public class GangliaProperties {
 	/**
 	 * Base time unit used to report rates.
 	 */
-	private TimeUnit rateUnits = TimeUnit.SECONDS;
+	private TimeUnit rateUnits;
 
 	/**
 	 * Base time unit used to report durations.
@@ -57,7 +58,7 @@ public class GangliaProperties {
 	/**
 	 * Ganglia protocol version. Must be either 3.1 or 3.0.
 	 */
-	private String protocolVersion = "3.1";
+	private String protocolVersion;
 
 	/**
 	 * UDP addressing mode, either unicast or multicast.
@@ -96,10 +97,13 @@ public class GangliaProperties {
 		this.step = step;
 	}
 
+	@Deprecated
+	@DeprecatedConfigurationProperty(reason = "No longer used by Micormeter")
 	public TimeUnit getRateUnits() {
 		return this.rateUnits;
 	}
 
+	@Deprecated
 	public void setRateUnits(TimeUnit rateUnits) {
 		this.rateUnits = rateUnits;
 	}
@@ -112,10 +116,13 @@ public class GangliaProperties {
 		this.durationUnits = durationUnits;
 	}
 
+	@Deprecated
+	@DeprecatedConfigurationProperty(reason = "No longer used by Micormeter")
 	public String getProtocolVersion() {
 		return this.protocolVersion;
 	}
 
+	@Deprecated
 	public void setProtocolVersion(String protocolVersion) {
 		this.protocolVersion = protocolVersion;
 	}

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

@@ -36,11 +36,6 @@ public abstract class PushRegistryPropertiesConfigAdapter<T extends PushRegistry
 		super(properties);
 	}
 
-	@Override
-	public String prefix() {
-		return null;
-	}
-
 	@Override
 	public String get(String k) {
 		return null;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -105,4 +105,4 @@ org.springframework.boot.actuate.autoconfigure.web.servlet.ServletManagementChil
 org.springframework.boot.actuate.autoconfigure.web.servlet.WebMvcEndpointChildContextConfiguration
 
 org.springframework.boot.diagnostics.FailureAnalyzer=\
-org.springframework.boot.actuate.autoconfigure.metrics.MissingRequiredConfigurationFailureAnalyzer
+org.springframework.boot.actuate.autoconfigure.metrics.ValidationFailureAnalyzer

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/MissingRequiredConfigurationFailureAnalyzerTests.java → spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/ValidationFailureAnalyzerTests.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -30,19 +30,20 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.fail;
 
 /**
- * Tests for {@link MissingRequiredConfigurationFailureAnalyzer}.
+ * Tests for {@link ValidationFailureAnalyzer}.
  *
  * @author Andy Wilkinson
  */
-class MissingRequiredConfigurationFailureAnalyzerTests {
+class ValidationFailureAnalyzerTests {
 
 	@Test
 	void analyzesMissingRequiredConfiguration() {
-		FailureAnalysis analysis = new MissingRequiredConfigurationFailureAnalyzer()
-				.analyze(createFailure(MissingAccountIdConfiguration.class));
+		FailureAnalysis analysis = new ValidationFailureAnalyzer()
+				.analyze(createFailure(MissingAccountIdAndApiKeyConfiguration.class));
 		assertThat(analysis).isNotNull();
-		assertThat(analysis.getDescription()).isEqualTo("accountId must be set to report metrics to New Relic.");
-		assertThat(analysis.getAction()).isEqualTo("Update your application to provide the missing configuration.");
+		assertThat(analysis.getDescription()).isEqualTo(String.format("Invalid Micrometer configuration detected:%n%n"
+				+ "  - management.metrics.export.newrelic.apiKey was 'null' but it is required when publishing to Insights API%n"
+				+ "  - management.metrics.export.newrelic.accountId was 'null' but it is required when publishing to Insights API"));
 	}
 
 	private Exception createFailure(Class<?> configuration) {
@@ -56,7 +57,7 @@ class MissingRequiredConfigurationFailureAnalyzerTests {
 	}
 
 	@Configuration(proxyBeanMethods = false)
-	static class MissingAccountIdConfiguration {
+	static class MissingAccountIdAndApiKeyConfiguration {
 
 		@Bean
 		NewRelicMeterRegistry meterRegistry() {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/ganglia/GangliaPropertiesTests.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -29,6 +29,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 class GangliaPropertiesTests {
 
 	@Test
+	@SuppressWarnings("deprecation")
 	void defaultValuesAreConsistent() {
 		GangliaProperties properties = new GangliaProperties();
 		GangliaConfig config = GangliaConfig.DEFAULT;

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/wavefront/WavefrontPropertiesTests.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -36,8 +36,6 @@ class WavefrontPropertiesTests extends PushRegistryPropertiesTests {
 		WavefrontConfig config = WavefrontConfig.DEFAULT_DIRECT;
 		assertStepRegistryDefaultValues(properties, config);
 		assertThat(properties.getUri().toString()).isEqualTo(config.uri());
-		// source has no static default value
-		assertThat(properties.getApiToken()).isEqualTo(config.apiToken());
 		assertThat(properties.getGlobalPrefix()).isEqualTo(config.globalPrefix());
 	}