Move code from spring-boot-actuator to spring-boot-mail

See gh-46079

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/mail/MailHealthContributorAutoConfiguration.java

@@ -20,12 +20,12 @@ import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.boot.actuate.autoconfigure.health.CompositeHealthContributorConfiguration;
 import org.springframework.boot.actuate.autoconfigure.health.ConditionalOnEnabledHealthIndicator;
 import org.springframework.boot.actuate.health.HealthContributor;
-import org.springframework.boot.actuate.mail.MailHealthIndicator;
 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.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.mail.actuate.health.MailHealthIndicator;
 import org.springframework.boot.mail.autoconfigure.MailSenderAutoConfiguration;
 import org.springframework.context.annotation.Bean;
 import org.springframework.mail.javamail.JavaMailSenderImpl;
@@ -37,7 +37,7 @@ import org.springframework.mail.javamail.JavaMailSenderImpl;
  * @since 2.0.0
  */
 @AutoConfiguration(after = MailSenderAutoConfiguration.class)
-@ConditionalOnClass(JavaMailSenderImpl.class)
+@ConditionalOnClass({ JavaMailSenderImpl.class, MailHealthIndicator.class })
 @ConditionalOnBean(JavaMailSenderImpl.class)
 @ConditionalOnEnabledHealthIndicator("mail")
 public class MailHealthContributorAutoConfiguration

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/mail/MailHealthContributorAutoConfigurationTests.java

@@ -19,8 +19,8 @@ package org.springframework.boot.actuate.autoconfigure.mail;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.actuate.autoconfigure.health.HealthContributorAutoConfiguration;
-import org.springframework.boot.actuate.mail.MailHealthIndicator;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.mail.actuate.health.MailHealthIndicator;
 import org.springframework.boot.mail.autoconfigure.MailSenderAutoConfiguration;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 

spring-boot-project/spring-boot-mail/build.gradle

@@ -31,6 +31,9 @@ dependencies {
 	api("org.springframework:spring-context-support")
 	api("org.eclipse.angus:jakarta.mail")
 
+	compileOnly("com.fasterxml.jackson.core:jackson-annotations")
+
+	optional(project(":spring-boot-project:spring-boot-actuator"))
 	optional(project(":spring-boot-project:spring-boot-autoconfigure"))
 
 	dockerTestImplementation(project(":spring-boot-project:spring-boot-test"))
@@ -38,8 +41,11 @@ dependencies {
 	dockerTestImplementation("org.testcontainers:testcontainers")
 	dockerTestImplementation("org.testcontainers:junit-jupiter")
 
+	testCompileOnly("com.fasterxml.jackson.core:jackson-annotations")
+
 	testImplementation(project(":spring-boot-project:spring-boot-test"))
 	testImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-test-support"))
 	testImplementation(testFixtures(project(":spring-boot-project:spring-boot-autoconfigure")))
+
 	testRuntimeOnly("ch.qos.logback:logback-classic")
 }

spring-boot-project/spring-boot-mail/src/main/java/org/springframework/boot/mail/actuate/health/MailHealthIndicator.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.actuate.mail;
+package org.springframework.boot.mail.actuate.health;
 
 import org.springframework.boot.actuate.health.AbstractHealthIndicator;
 import org.springframework.boot.actuate.health.Health.Builder;
@@ -27,7 +27,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Johannes Edmeier
  * @author Scott Frederick
- * @since 2.0.0
+ * @since 4.0.0
  */
 public class MailHealthIndicator extends AbstractHealthIndicator {
 

spring-boot-project/spring-boot-mail/src/main/java/org/springframework/boot/mail/actuate/health/package-info.java

@@ -15,6 +15,6 @@
  */
 
 /**
- * Actuator support for JavaMail.
+ * Health integration for JavaMail.
  */
-package org.springframework.boot.actuate.mail;
+package org.springframework.boot.mail.actuate.health;

spring-boot-project/spring-boot-mail/src/test/java/org/springframework/boot/mail/actuate/health/MailHealthIndicatorTests.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.actuate.mail;
+package org.springframework.boot.mail.actuate.health;
 
 import java.util.Properties;