Support Mongo's Stable API in MongoHealthIndicator

Closes gh-30849

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/mongo/MongoHealthIndicator.java

@@ -43,8 +43,8 @@ public class MongoHealthIndicator extends AbstractHealthIndicator {
 
 	@Override
 	protected void doHealthCheck(Health.Builder builder) throws Exception {
-		Document result = this.mongoTemplate.executeCommand("{ buildInfo: 1 }");
-		builder.up().withDetail("version", result.getString("version"));
+		Document result = this.mongoTemplate.executeCommand("{ isMaster: 1 }");
+		builder.up().withDetail("maxWireVersion", result.getInteger("maxWireVersion"));
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/mongo/MongoReactiveHealthIndicator.java

@@ -43,12 +43,12 @@ public class MongoReactiveHealthIndicator extends AbstractReactiveHealthIndicato
 
 	@Override
 	protected Mono<Health> doHealthCheck(Health.Builder builder) {
-		Mono<Document> buildInfo = this.reactiveMongoTemplate.executeCommand("{ buildInfo: 1 }");
+		Mono<Document> buildInfo = this.reactiveMongoTemplate.executeCommand("{ isMaster: 1 }");
 		return buildInfo.map((document) -> up(builder, document));
 	}
 
 	private Health up(Health.Builder builder, Document document) {
-		return builder.up().withDetail("version", document.getString("version")).build();
+		return builder.up().withDetail("maxWireVersion", document.getInteger("maxWireVersion")).build();
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/mongo/MongoHealthIndicatorTests.java

@@ -40,26 +40,26 @@ class MongoHealthIndicatorTests {
 	@Test
 	void mongoIsUp() {
 		Document commandResult = mock(Document.class);
-		given(commandResult.getString("version")).willReturn("2.6.4");
+		given(commandResult.getInteger("maxWireVersion")).willReturn(10);
 		MongoTemplate mongoTemplate = mock(MongoTemplate.class);
-		given(mongoTemplate.executeCommand("{ buildInfo: 1 }")).willReturn(commandResult);
+		given(mongoTemplate.executeCommand("{ isMaster: 1 }")).willReturn(commandResult);
 		MongoHealthIndicator healthIndicator = new MongoHealthIndicator(mongoTemplate);
 		Health health = healthIndicator.health();
 		assertThat(health.getStatus()).isEqualTo(Status.UP);
-		assertThat(health.getDetails().get("version")).isEqualTo("2.6.4");
-		then(commandResult).should().getString("version");
-		then(mongoTemplate).should().executeCommand("{ buildInfo: 1 }");
+		assertThat(health.getDetails().get("maxWireVersion")).isEqualTo(10);
+		then(commandResult).should().getInteger("maxWireVersion");
+		then(mongoTemplate).should().executeCommand("{ isMaster: 1 }");
 	}
 
 	@Test
 	void mongoIsDown() {
 		MongoTemplate mongoTemplate = mock(MongoTemplate.class);
-		given(mongoTemplate.executeCommand("{ buildInfo: 1 }")).willThrow(new MongoException("Connection failed"));
+		given(mongoTemplate.executeCommand("{ isMaster: 1 }")).willThrow(new MongoException("Connection failed"));
 		MongoHealthIndicator healthIndicator = new MongoHealthIndicator(mongoTemplate);
 		Health health = healthIndicator.health();
 		assertThat(health.getStatus()).isEqualTo(Status.DOWN);
 		assertThat((String) health.getDetails().get("error")).contains("Connection failed");
-		then(mongoTemplate).should().executeCommand("{ buildInfo: 1 }");
+		then(mongoTemplate).should().executeCommand("{ isMaster: 1 }");
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/mongo/MongoReactiveHealthIndicatorTests.java

@@ -41,23 +41,23 @@ class MongoReactiveHealthIndicatorTests {
 	@Test
 	void testMongoIsUp() {
 		Document buildInfo = mock(Document.class);
-		given(buildInfo.getString("version")).willReturn("2.6.4");
+		given(buildInfo.getInteger("maxWireVersion")).willReturn(10);
 		ReactiveMongoTemplate reactiveMongoTemplate = mock(ReactiveMongoTemplate.class);
-		given(reactiveMongoTemplate.executeCommand("{ buildInfo: 1 }")).willReturn(Mono.just(buildInfo));
+		given(reactiveMongoTemplate.executeCommand("{ isMaster: 1 }")).willReturn(Mono.just(buildInfo));
 		MongoReactiveHealthIndicator mongoReactiveHealthIndicator = new MongoReactiveHealthIndicator(
 				reactiveMongoTemplate);
 		Mono<Health> health = mongoReactiveHealthIndicator.health();
 		StepVerifier.create(health).consumeNextWith((h) -> {
 			assertThat(h.getStatus()).isEqualTo(Status.UP);
-			assertThat(h.getDetails()).containsOnlyKeys("version");
-			assertThat(h.getDetails().get("version")).isEqualTo("2.6.4");
+			assertThat(h.getDetails()).containsOnlyKeys("maxWireVersion");
+			assertThat(h.getDetails().get("maxWireVersion")).isEqualTo(10);
 		}).verifyComplete();
 	}
 
 	@Test
 	void testMongoIsDown() {
 		ReactiveMongoTemplate reactiveMongoTemplate = mock(ReactiveMongoTemplate.class);
-		given(reactiveMongoTemplate.executeCommand("{ buildInfo: 1 }"))
+		given(reactiveMongoTemplate.executeCommand("{ isMaster: 1 }"))
 				.willThrow(new MongoException("Connection failed"));
 		MongoReactiveHealthIndicator mongoReactiveHealthIndicator = new MongoReactiveHealthIndicator(
 				reactiveMongoTemplate);

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-mongo/src/main/resources/application.properties

@@ -1,3 +1,4 @@
 management.endpoints.web.exposure.include=*
+management.endpoint.health.show-details=always
 spring.security.user.name=user
 spring.security.user.password=password

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-mongo/src/test/java/smoketest/session/mongodb/SampleSessionMongoApplicationTests.java

@@ -29,6 +29,7 @@ import org.testcontainers.junit.jupiter.Testcontainers;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.boot.testsupport.testcontainers.DockerImageNames;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.HttpHeaders;
@@ -53,6 +54,9 @@ public class SampleSessionMongoApplicationTests {
 	@Autowired
 	private TestRestTemplate restTemplate;
 
+	@LocalServerPort
+	private int port;
+
 	@Container
 	static MongoDBContainer mongo = new MongoDBContainer(DockerImageNames.mongo()).withStartupAttempts(3)
 			.withStartupTimeout(Duration.ofMinutes(2));
@@ -73,6 +77,15 @@ public class SampleSessionMongoApplicationTests {
 		assertThat(sessions.size()).isEqualTo(1);
 	}
 
+	@Test
+	@SuppressWarnings("unchecked")
+	void health() {
+		ResponseEntity<String> entity = this.restTemplate
+				.getForEntity("http://localhost:" + this.port + "/actuator/health", String.class);
+		assertThat(entity.getBody()).contains("\"status\":\"UP\"");
+		assertThat(entity.getBody()).contains("maxWireVersion");
+	}
+
 	private void createSession(URI uri) {
 		RequestEntity<Object> request = getRequestEntity(uri);
 		this.restTemplate.exchange(request, String.class);