Do not require DataSourcePoolMetrics to auto-configure Hikari meters

Closes gh-13330

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

@@ -50,17 +50,20 @@ import org.springframework.util.StringUtils;
 @Configuration
 @AutoConfigureAfter({ MetricsAutoConfiguration.class, DataSourceAutoConfiguration.class,
 		SimpleMetricsExportAutoConfiguration.class })
-@ConditionalOnBean({ DataSource.class, DataSourcePoolMetadataProvider.class,
+@ConditionalOnBean({ DataSource.class, MeterRegistry.class })
-		MeterRegistry.class })
 public class DataSourcePoolMetricsAutoConfiguration {
 
+	@Configuration
+	@ConditionalOnBean(DataSourcePoolMetadataProvider.class)
+	static class DataSourcePoolMetadataMetricsConfiguration {
+
 		private static final String DATASOURCE_SUFFIX = "dataSource";
 
 		private final MeterRegistry registry;
 
 		private final Collection<DataSourcePoolMetadataProvider> metadataProviders;
 
-	public DataSourcePoolMetricsAutoConfiguration(MeterRegistry registry,
+		DataSourcePoolMetadataMetricsConfiguration(MeterRegistry registry,
 				Collection<DataSourcePoolMetadataProvider> metadataProviders) {
 			this.registry = registry;
 			this.metadataProviders = metadataProviders;
@@ -85,11 +88,14 @@ public class DataSourcePoolMetricsAutoConfiguration {
 		private String getDataSourceName(String beanName) {
 			if (beanName.length() > DATASOURCE_SUFFIX.length()
 					&& StringUtils.endsWithIgnoreCase(beanName, DATASOURCE_SUFFIX)) {
-			return beanName.substring(0, beanName.length() - DATASOURCE_SUFFIX.length());
+				return beanName.substring(0,
+						beanName.length() - DATASOURCE_SUFFIX.length());
 			}
 			return beanName;
 		}
 
+	}
+
 	@Configuration
 	@ConditionalOnClass(HikariDataSource.class)
 	static class HikariDataSourceMetricsConfiguration {

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

@@ -33,6 +33,7 @@ import org.springframework.boot.actuate.autoconfigure.metrics.test.MetricsRun;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
 import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.boot.jdbc.metadata.DataSourcePoolMetadataProvider;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -53,22 +54,29 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 	private ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withPropertyValues("spring.datasource.generate-unique-name=true")
 			.with(MetricsRun.simple())
-			.withConfiguration(AutoConfigurations.of(DataSourceAutoConfiguration.class,
+			.withConfiguration(
-					DataSourcePoolMetricsAutoConfiguration.class))
+					AutoConfigurations.of(DataSourcePoolMetricsAutoConfiguration.class))
 			.withUserConfiguration(BaseConfiguration.class);
 
 	@Test
 	public void autoConfiguredDataSourceIsInstrumented() {
-		this.contextRunner.run((context) -> {
+		this.contextRunner
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
+				.run((context) -> {
 					context.getBean(DataSource.class).getConnection().getMetaData();
 					MeterRegistry registry = context.getBean(MeterRegistry.class);
-			registry.get("jdbc.connections.max").tags("name", "dataSource").meter();
+					registry.get("jdbc.connections.max").tags("name", "dataSource")
+							.meter();
 				});
 	}
 
 	@Test
 	public void dataSourceInstrumentationCanBeDisabled() {
-		this.contextRunner.withPropertyValues("management.metrics.enable.jdbc=false")
+		this.contextRunner
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
+				.withPropertyValues("management.metrics.enable.jdbc=false")
 				.run((context) -> {
 					context.getBean(DataSource.class).getConnection().getMetaData();
 					MeterRegistry registry = context.getBean(MeterRegistry.class);
@@ -79,7 +87,10 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 
 	@Test
 	public void allDataSourcesCanBeInstrumented() {
-		this.contextRunner.withUserConfiguration(TwoDataSourcesConfiguration.class)
+		this.contextRunner
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
+				.withUserConfiguration(TwoDataSourcesConfiguration.class)
 				.run((context) -> {
 					context.getBean("firstDataSource", DataSource.class).getConnection()
 							.getMetaData();
@@ -94,7 +105,10 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 
 	@Test
 	public void autoConfiguredHikariDataSourceIsInstrumented() {
-		this.contextRunner.run((context) -> {
+		this.contextRunner
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
+				.run((context) -> {
 					context.getBean(DataSource.class).getConnection();
 					MeterRegistry registry = context.getBean(MeterRegistry.class);
 					registry.get("hikaricp.connections").meter();
@@ -106,6 +120,8 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 		this.contextRunner
 				.withPropertyValues(
 						"spring.datasource.schema:db/create-custom-schema.sql")
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
 				.run((context) -> {
 					context.getBean(DataSource.class).getConnection();
 					MeterRegistry registry = context.getBean(MeterRegistry.class);
@@ -116,6 +132,8 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 	@Test
 	public void hikariCanBeInstrumentedAfterThePoolHasBeenSealed() {
 		this.contextRunner.withUserConfiguration(HikariSealingConfiguration.class)
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
 				.run((context) -> {
 					assertThat(context).hasNotFailed();
 					context.getBean(DataSource.class).getConnection();
@@ -127,6 +145,8 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 	@Test
 	public void hikariDataSourceInstrumentationCanBeDisabled() {
 		this.contextRunner.withPropertyValues("management.metrics.enable.hikaricp=false")
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
 				.run((context) -> {
 					context.getBean(DataSource.class).getConnection();
 					MeterRegistry registry = context.getBean(MeterRegistry.class);
@@ -137,6 +157,8 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 	@Test
 	public void allHikariDataSourcesCanBeInstrumented() {
 		this.contextRunner.withUserConfiguration(TwoHikariDataSourcesConfiguration.class)
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
 				.run((context) -> {
 					context.getBean("firstDataSource", DataSource.class).getConnection();
 					context.getBean("secondOne", DataSource.class).getConnection();
@@ -151,6 +173,8 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 	@Test
 	public void someHikariDataSourcesCanBeInstrumented() {
 		this.contextRunner.withUserConfiguration(MixedDataSourcesConfiguration.class)
+				.withConfiguration(
+						AutoConfigurations.of(DataSourceAutoConfiguration.class))
 				.run((context) -> {
 					context.getBean("firstDataSource", DataSource.class).getConnection();
 					context.getBean("secondOne", DataSource.class).getConnection();
@@ -161,6 +185,20 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void hikariDataSourceIsInstrumentedWithoutMetadataProvider() {
+		this.contextRunner.withUserConfiguration(OneHikariDataSourceConfiguration.class)
+				.run((context) -> {
+					assertThat(context)
+							.doesNotHaveBean(DataSourcePoolMetadataProvider.class);
+					context.getBean("hikariDataSource", DataSource.class).getConnection();
+					MeterRegistry registry = context.getBean(MeterRegistry.class);
+					assertThat(registry.get("hikaricp.connections").meter().getId()
+							.getTags())
+									.containsExactly(Tag.of("pool", "hikariDataSource"));
+				});
+	}
+
 	@Configuration
 	static class BaseConfiguration {
 
@@ -214,6 +252,20 @@ public class DataSourcePoolMetricsAutoConfigurationTests {
 
 	}
 
+	@Configuration
+	static class OneHikariDataSourceConfiguration {
+
+		@Bean
+		public DataSource hikariDataSource() {
+			String url = "jdbc:hsqldb:mem:test-" + UUID.randomUUID();
+			HikariDataSource hikariDataSource = DataSourceBuilder.create().url(url)
+					.type(HikariDataSource.class).build();
+			hikariDataSource.setPoolName("hikariDataSource");
+			return hikariDataSource;
+		}
+
+	}
+
 	@Configuration
 	static class MixedDataSourcesConfiguration {