补充注释

spring-boot-admin-client/src/main/java/de/codecentric/boot/admin/client/registration/RegistrationApplicationListener.java

@@ -18,6 +18,7 @@ package de.codecentric.boot.admin.client.registration;
 
 import java.time.Duration;
 import java.util.concurrent.ScheduledFuture;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.DisposableBean;
@@ -32,6 +33,8 @@ import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 /**
  * Listener responsible for starting and stopping the registration task when the application is
  * ready.
+ * <p>
+ * 监听器负责在应用程序准备就绪时启动和停止注册任务
  *
  * @author Johannes Edmeier
  */
@@ -82,6 +85,9 @@ public class RegistrationApplicationListener implements InitializingBean, Dispos
         }
     }
 
+    /**
+     * 开始定时执行注册的任务，每十秒去刷新一次
+     */
     public void startRegisterTask() {
         if (scheduledTask != null && !scheduledTask.isDone()) {
             return;

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/server/services/InstanceRegistry.java

@@ -40,10 +40,11 @@ public class InstanceRegistry {
     }
 
     /**
+     * 注册实例
      * Register instance.
      *
-     * @param registration instance to be registered.
-     * @return the if of the registered instance.
+     * @param registration 实例将会被注册.
+     * @return 注册之后的ID.
      */
     public Mono<InstanceId> register(Registration registration) {
         Assert.notNull(registration, "'registration' must not be null");
@@ -94,6 +95,6 @@ public class InstanceRegistry {
      */
     public Mono<InstanceId> deregister(InstanceId id) {
         return repository.computeIfPresent(id, (key, instance) -> Mono.just(instance.deregister()))
-                         .map(Instance::getId);
+            .map(Instance::getId);
     }
 }