use enum for health type

Author: charlesmst

grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/autoconfigure/GrpcHealthServiceAutoConfiguration.java

@@ -57,14 +57,14 @@ HealthStatusManager healthStatusManager() {
 
     @Bean
     @GrpcService
-    @ConditionalOnProperty(prefix = "grpc.server", name = "health-service-type", havingValue = "grpc", matchIfMissing = true)
+    @ConditionalOnProperty(prefix = "grpc.server", name = "health-service-type", havingValue = "GRPC", matchIfMissing = true)
     BindableService grpcHealthService(final HealthStatusManager healthStatusManager) {
         return healthStatusManager.getHealthService();
     }
 
     @Bean
     @GrpcService
-    @ConditionalOnProperty(prefix = "grpc.server", name = "health-service-type", havingValue = "actuator")
+    @ConditionalOnProperty(prefix = "grpc.server", name = "health-service-type", havingValue = "ACTUATOR")
     @ConditionalOnBean(HealthEndpoint.class)
     BindableService grpcHealthServiceActuator(final HealthEndpoint healthStatusManager) {
         return new ActuatorGrpcHealth(healthStatusManager);

grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/config/GrpcServerProperties.java

@@ -229,9 +229,12 @@ public class GrpcServerProperties {
     private boolean healthServiceEnabled = true;
 
     /**
-     * @TODO
+     * Implementation of gRPC health service. Defaults to {@link HealthType#GRPC GRPC}.
+     *
+     * @param healthServiceType The implementation of gRPC health service.
+     * @return GRPC or Actuator.
      */
-    private String healthServiceType = "grpc";
+    private HealthType healthServiceType = HealthType.GRPC;
 
     /**
      * Whether proto reflection service is enabled or not. Defaults to {@code true}.

grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/config/HealthType.java

@@ -0,0 +1,15 @@
+package net.devh.boot.grpc.server.config;
+
+/**
+ * Enum to specify the type of health service to use in GRPC.
+ */
+public enum HealthType {
+    /**
+     * Use the standard GRPC health service from io.grpc.
+     */
+    GRPC,
+    /**
+     * Uses a bridge to the Spring Boot Actuator health service.
+     */
+    ACTUATOR
+}

grpc-server-spring-boot-starter/src/test/java/net/devh/boot/grpc/server/autoconfigure/GrpcHealthServiceTrueActuatorConfigurationTest.java

@@ -42,7 +42,7 @@
         GrpcHealthServiceTrueActuatorConfigurationTest.TestConfig.class
 },
         properties = {
-                "grpc.server.health-service-type=actuator",
+                "grpc.server.health-service-type=ACTUATOR",
         })
 @ImportAutoConfiguration({
         GrpcServerAutoConfiguration.class,