Add missing actuator metadata

Health metadata for cassandra and couchbase is added.

See gh-7632

spring-boot-actuator/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -85,6 +85,18 @@
     "type": "java.util.Map<java.lang.String,java.lang.Object>",
     "description": "Arbitrary properties to add to the info endpoint."
   },
+  {
+    "name": "management.health.cassandra.enabled",
+    "type": "java.lang.Boolean",
+    "description": "Enable cassandra health check.",
+    "defaultValue": true
+  },
+  {
+    "name": "management.health.couchbase.enabled",
+    "type": "java.lang.Boolean",
+    "description": "Enable couchbase health check.",
+    "defaultValue": true
+  },
   {
     "name": "management.health.db.enabled",
     "type": "java.lang.Boolean",

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/HealthIndicatorAutoConfigurationTests.java

@@ -457,6 +457,21 @@ public class HealthIndicatorAutoConfigurationTests {
 				.isEqualTo(CassandraHealthIndicator.class);
 	}
 
+	@Test
+	public void notCassandraHealthIndicator() throws Exception {
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"management.health.diskspace.enabled:false",
+				"management.health.cassandra.enabled:false");
+		this.context.register(CassandraConfiguration.class,
+				ManagementServerProperties.class, HealthIndicatorAutoConfiguration.class);
+		this.context.refresh();
+		Map<String, HealthIndicator> beans = this.context
+				.getBeansOfType(HealthIndicator.class);
+		assertThat(beans).hasSize(1);
+		assertThat(beans.values().iterator().next().getClass())
+				.isEqualTo(ApplicationHealthIndicator.class);
+	}
+
 	@Test
 	public void couchbaseHealthIndicator() throws Exception {
 		EnvironmentTestUtils.addEnvironment(this.context,
@@ -471,6 +486,21 @@ public class HealthIndicatorAutoConfigurationTests {
 				.isEqualTo(CouchbaseHealthIndicator.class);
 	}
 
+	@Test
+	public void notCouchbaseHealthIndicator() throws Exception {
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"management.health.diskspace.enabled:false",
+				"management.health.couchbase.enabled:false");
+		this.context.register(CouchbaseConfiguration.class,
+				ManagementServerProperties.class, HealthIndicatorAutoConfiguration.class);
+		this.context.refresh();
+		Map<String, HealthIndicator> beans = this.context
+				.getBeansOfType(HealthIndicator.class);
+		assertThat(beans.size()).isEqualTo(1);
+		assertThat(beans.values().iterator().next().getClass())
+				.isEqualTo(ApplicationHealthIndicator.class);
+	}
+
 	@Configuration
 	@EnableConfigurationProperties
 	protected static class DataSourceConfig {