Add conditional config guard for MBeanServer

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientConfiguration.java

@@ -21,6 +21,7 @@ import javax.management.MBeanServer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -56,7 +57,8 @@ import com.netflix.discovery.EurekaClientConfig;
 public class EurekaClientConfiguration implements
 		ApplicationListener<ContextRefreshedEvent>, SmartLifecycle, Ordered {
 
-    private static final Logger logger = LoggerFactory.getLogger(EurekaClientConfiguration.class);
+	private static final Logger logger = LoggerFactory
+			.getLogger(EurekaClientConfiguration.class);
 
 	private boolean running;
 
@@ -70,7 +72,8 @@ public class EurekaClientConfiguration implements
 
 	@Override
 	public void onApplicationEvent(ContextRefreshedEvent event) {
-       logger.info("Registering application {} with eureka with status UP", instanceConfig.getAppname());
+		logger.info("Registering application {} with eureka with status UP",
+				instanceConfig.getAppname());
 		ApplicationInfoManager.getInstance().setInstanceStatus(InstanceStatus.UP);
 	}
 
@@ -117,15 +120,18 @@ public class EurekaClientConfiguration implements
 
 	@Bean
 	@Lazy
-	@Scope(proxyMode=ScopedProxyMode.TARGET_CLASS)
+	@Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)
 	public DiscoveryClient discoveryClient() {
 		return DiscoveryManager.getInstance().getDiscoveryClient();
 	}
 
 	@Bean
 	@ConditionalOnMissingBean
-	public EurekaHealthIndicator eurekaHealthIndicator(MBeanServer server, EurekaInstanceConfig config) {
-		return new EurekaHealthIndicator(discoveryClient(), new ServoMetricReader(server), config);
+	@ConditionalOnBean(MBeanServer.class)
+	public EurekaHealthIndicator eurekaHealthIndicator(MBeanServer server,
+			EurekaInstanceConfig config) {
+		return new EurekaHealthIndicator(discoveryClient(),
+				new ServoMetricReader(server), config);
 	}
 
 }

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/servo/ServoMetricsAutoConfiguration.java

@@ -35,14 +35,15 @@ import com.netflix.servo.monitor.Monitors;
  *
  */
 @Configuration
-@ConditionalOnClass({Monitors.class,MetricReader.class})
-@ConditionalOnBean({MBeanServer.class,MetricReader.class})
+@ConditionalOnClass({ Monitors.class, MetricReader.class })
+@ConditionalOnBean(MetricReader.class)
 @AutoConfigureBefore(EndpointAutoConfiguration.class)
 @AutoConfigureAfter(MetricRepositoryAutoConfiguration.class)
 public class ServoMetricsAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
+	@ConditionalOnBean(MBeanServer.class)
 	public ServoPublicMetrics servoPublicMetrics(MetricReader reader, MBeanServer server) {
 		return new ServoPublicMetrics(reader, server);
 	}