private final List<Thread> hooks = new ArrayList<>();

    @Override
    synchronized void addShutdownHook(Thread hook) {
      hooks.add(hook);
    }

    synchronized void shutdown() throws InterruptedException {
      for (Thread hook : hooks) {
        hook.start();
      }
      for (Thread hook : hooks) {
        hook.join();
      }
    }
  }

     *
     * @param form the create form containing the item data
     * @param hook the validation error hook
     * @return optional entity containing the created stopwords item
     */
    public static OptionalEntity<StopwordsItem> createStopwordsItem(final CreateForm form, final VaErrorHook hook) {
        return getEntity(form).map(entity -> {
            final String newInput = form.input;

     * Create a char mapping item.
     * @param form The create form.
     * @param hook The error hook.
     * @return An optional entity of a char mapping item.
     */
    protected OptionalEntity<CharMappingItem> createCharMappingItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createCharMappingItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();

    //                                                                               Hook
    //                                                                              ======
    // to suppress unexpected override by sub-class
    // you should remove the 'final' if you need to override this
    /**
     * Hook method called before action execution.
     * This method refreshes the user information if a user is logged in

    /**
     * Get the protected word item.
     * @param form The create form.
     * @param hook The error hook.
     * @return The protected word item.
     */
    protected OptionalEntity<ProtwordsItem> createProtwordsItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createProtwordsItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();

     * @param hook the validation error hook for handling errors
     * @return OptionalEntity containing the created synonym item or empty if creation failed
     */
    protected OptionalEntity<SynonymItem> createSynonymItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createSynonymItem(this, form, hook);
        } catch (final ValidationErrorException e) {

     * @param form The create form.
     * @param hook The error hook.
     * @return An optional entity of a stemmer override item.
     */
    protected OptionalEntity<StemmerOverrideItem> createStemmerOverrideItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createStemmerOverrideItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();

    /**
     * Create a kuromoji item.
     * @param form The create form.
     * @param hook The error hook.
     * @return An optional entity of a kuromoji item.
     */
    protected OptionalEntity<KuromojiItem> createKuromojiItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createKuromojiItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();

"minio.fullname" . }}-make-bucket-job labels: app: {{ template "minio.name" . }}-make-bucket-job chart: {{ template "minio.chart" . }} release: {{ .Release.Name }} heritage: {{ .Release.Service }} annotations: "helm.sh/hook": post-install,post-upgrade "helm.sh/hook-delete-policy": hook-succeeded,before-hook-creation {{- with .Values.makeBucketJob.annotations }} {{ toYaml . | indent 4 }} {{- end }} spec: template: metadata: labels: app: {{ template "minio.name" . }}-job release: {{ .Release.Name }} {{- if .Values.podLabels...

"minio.fullname" . }}-make-bucket-job labels: app: {{ template "minio.name" . }}-make-bucket-job chart: {{ template "minio.chart" . }} release: {{ .Release.Name }} heritage: {{ .Release.Service }} annotations: "helm.sh/hook": post-install,post-upgrade "helm.sh/hook-delete-policy": hook-succeeded,before-hook-creation {{- with .Values.makeBucketJob.annotations }} {{ toYaml . | indent 4 }} {{- end }} spec: template: metadata: labels: app: {{ template "minio.name" . }}-job release: {{ .Release.Name }} {{- if .Values.podLabels...