Create spring-boot-health module

Issue: 46155

Author: philwebb

settings.gradle

@@ -95,6 +95,7 @@ include "spring-boot-project:spring-boot-gson"
 include "spring-boot-project:spring-boot-h2console"
 include "spring-boot-project:spring-boot-hateoas"
 include "spring-boot-project:spring-boot-hazelcast"
+include "spring-boot-project:spring-boot-health"
 include "spring-boot-project:spring-boot-hibernate"
 include "spring-boot-project:spring-boot-http-client"
 include "spring-boot-project:spring-boot-http-converter"

spring-boot-project/spring-boot-actuator-autoconfigure/build.gradle

@@ -28,10 +28,11 @@ description = "Spring Boot Actuator AutoConfigure"
 dependencies {
 	api(project(":spring-boot-project:spring-boot-actuator"))
 	api(project(":spring-boot-project:spring-boot-autoconfigure"))
-	
+
 	implementation("com.fasterxml.jackson.core:jackson-databind")
 	implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
 
+	optional(project(":spring-boot-project:spring-boot-health"))
 	optional(project(":spring-boot-project:spring-boot-web-server"))
 
 	optional("com.fasterxml.jackson.core:jackson-databind")

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/availability/AvailabilityHealthContributorAutoConfiguration.java

@@ -23,8 +23,10 @@
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBooleanProperty;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.availability.ApplicationAvailability;
+import org.springframework.boot.health.contributor.Health;
 import org.springframework.context.annotation.Bean;
 
 /**
@@ -35,6 +37,7 @@
  * @since 2.3.2
  */
 @AutoConfiguration(after = ApplicationAvailabilityAutoConfiguration.class)
+@ConditionalOnClass(Health.class)
 public class AvailabilityHealthContributorAutoConfiguration {
 
 	@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/jackson/JacksonEndpointAutoConfiguration.java

@@ -16,6 +16,9 @@
 
 package org.springframework.boot.actuate.autoconfigure.endpoint.jackson;
 
+import java.util.HashSet;
+import java.util.Set;
+
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
@@ -27,6 +30,7 @@
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.context.annotation.Bean;
 import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+import org.springframework.util.ClassUtils;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for Endpoint Jackson support.
@@ -38,6 +42,8 @@
 @SuppressWarnings("removal")
 public class JacksonEndpointAutoConfiguration {
 
+	private static final String CONTRIBUTED_HEALTH = "org.springframework.boot.health.contributor.ContributedHealth";
+
 	@Bean
 	@ConditionalOnBooleanProperty(name = "management.endpoints.jackson.isolated-object-mapper", matchIfMissing = true)
 	@ConditionalOnClass({ ObjectMapper.class, Jackson2ObjectMapperBuilder.class })
@@ -47,7 +53,24 @@ public EndpointObjectMapper endpointObjectMapper() {
 					SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS)
 			.serializationInclusion(Include.NON_NULL)
 			.build();
-		return () -> objectMapper;
+		Set<Class<?>> supportedTypes = new HashSet<>(EndpointObjectMapper.DEFAULT_SUPPORTED_TYPES);
+		if (ClassUtils.isPresent(CONTRIBUTED_HEALTH, null)) {
+			supportedTypes.add(ClassUtils.resolveClassName(CONTRIBUTED_HEALTH, null));
+		}
+		return new EndpointObjectMapper() {
+
+			@Override
+			public ObjectMapper get() {
+				return objectMapper;
+			}
+
+			@Override
+			public Set<Class<?>> getSupportedTypes() {
+				return supportedTypes;
+			}
+
+		};
+
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthContributorRegistry.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012-present 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
+ *
+ *      https://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.health;
+
+import java.util.Collections;
+import java.util.Set;
+
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
+import org.springframework.boot.health.registry.HealthContributorNameValidator;
+import org.springframework.util.Assert;
+
+/**
+ * {@link HealthContributorNameValidator} to ensure names don't clash with groups.
+ *
+ * @author Phillip Webb
+ */
+class GroupsHealthContributorNameValidator implements HealthContributorNameValidator {
+
+	private final Set<String> groupNames;
+
+	GroupsHealthContributorNameValidator(HealthEndpointGroups groups) {
+		this.groupNames = (groups != null) ? groups.getNames() : Collections.emptySet();
+	}
+
+	@Override
+	public void validate(String name) throws IllegalStateException {
+		Assert.state(!this.groupNames.contains(name),
+				() -> "HealthContributor with name \"" + name + "\" clashes with group");
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredReactiveHealthContributorRegistry.java

@@ -20,7 +20,10 @@
 import org.springframework.boot.actuate.health.HealthEndpoint;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.health.contributor.Health;
 import org.springframework.context.annotation.Import;
 
 /**
@@ -32,11 +35,14 @@
  * @author Scott Frederick
  * @since 2.0.0
  */
-@AutoConfiguration
+@AutoConfiguration(
+		afterName = "org.springframework.boot.health.autoconfigure.registry.HealthContributorRegistryAutoConfiguration")
+@ConditionalOnClass(Health.class)
+@ConditionalOnBean(type = "org.springframework.boot.health.registry.HealthContributorRegistry")
 @ConditionalOnAvailableEndpoint(HealthEndpoint.class)
 @EnableConfigurationProperties(HealthEndpointProperties.class)
-@Import({ HealthEndpointConfiguration.class, ReactiveHealthEndpointConfiguration.class,
-		HealthEndpointWebExtensionConfiguration.class, HealthEndpointReactiveWebExtensionConfiguration.class })
+@Import({ HealthEndpointConfiguration.class, HealthEndpointWebExtensionConfiguration.class,
+		HealthEndpointReactiveWebExtensionConfiguration.class })
 public class HealthEndpointAutoConfiguration {
 
 }