public void destroy() {
        available = false;
        for (final ComponentHolder<?> componentHolder : singletonMap.values()) {
            try {
                componentHolder.destroy();
            } catch (final Exception e) {
                logger.warn("Failed to destroy " + componentHolder.get(), e);
            }
        }
    }

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...

  @Override
  public final Service startAsync() {
    if (monitor.enterIf(isStartable)) {
      try {
        snapshot = new StateSnapshot(STARTING);
        enqueueStartingEvent();
        doStart();
      } catch (Throwable startupFailure) {
        restoreInterruptIfIsInterruptedException(startupFailure);
        notifyFailed(startupFailure);
      } finally {
        monitor.leave();
        dispatchListenerEvents();

#### Operation

ここでの「オペレーション」とは、HTTPの「メソッド」の1つを指します。

以下のようなものの1つ:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...さらによりエキゾチックなもの:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

HTTPプロトコルでは、これらの「メソッド」の1つ（または複数）を使用して各パスにアクセスできます。

---

APIを構築するときは、通常、これらの特定のHTTPメソッドを使用して特定のアクションを実行します。

通常は次を使用します:

* `POST`: データの作成
* `GET`: データの読み取り

   */
  @SuppressWarnings({
    "AmbiguousMethodReference", // We chose the name despite knowing this risk.
    "Java7ApiChecker",
  })
  // If users use this when they shouldn't, we hope that NewApi will catch subsequent Optional calls
  @IgnoreJRERequirement
  @CheckForNull
  public static <T> java.util.Optional<T> toJavaUtil(@CheckForNull Optional<T> googleOptional) {

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...

cluster (LoadBalancer service). ## or access it from within the cluster (ClusterIP service). Set the service type and the port to serve it. ## ref: http://kubernetes.io/docs/user-guide/services/ ## service: type: ClusterIP clusterIP: ~ ## Make sure to match it to minioAPIPort port: "9000" nodePort: 32000 ## Configure Ingress based on the documentation here: https://kubernetes.io/docs/concepts/services-networking/ingress/ ## ingress: enabled: false # ingressClassName: "" labels: {} # node-role.kubernetes.io/ingress:...