001/* -*- mode: Java; c-basic-offset: 2; indent-tabs-mode: nil; coding: utf-8-unix -*-
002 *
003 * Copyright © 2018 microBean.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
014 * implied.  See the License for the specific language governing
015 * permissions and limitations under the License.
016 */
017package org.microbean.kubernetes.controller.cdi.annotation;
018
019import java.lang.annotation.Documented;
020import java.lang.annotation.ElementType;
021import java.lang.annotation.Retention;
022import java.lang.annotation.RetentionPolicy;
023import java.lang.annotation.Target;
024
025import javax.inject.Qualifier;
026
027import javax.enterprise.util.AnnotationLiteral;
028
029/**
030 * A {@link Qualifier} that can be used only on an observer method's
031 * <a
032 * href="http://docs.jboss.org/cdi/spec/2.0/cdi-spec.html#observer_method_event_parameter">event
033 * parameter</a> that is also annotated with an annotation annotated
034 * with {@link KubernetesEventSelector}, thus indicating that the
035 * observer method is interested in being notified of the
036 * <em>deletion</em> of certain Kubernetes resources.
037 *
038 * @author <a href="https://about.me/lairdnelson"
039 * target="_parent">Laird Nelson</a>
040 *
041 * @see KubernetesEventSelector
042 */
043@Documented
044@Qualifier
045@Retention(value = RetentionPolicy.RUNTIME)
046@Target({ ElementType.PARAMETER })
047public @interface Deleted {
048
049
050  /*
051   * Inner and nested classes.
052   */
053
054
055  /**
056   * An {@link AnnotationLiteral} that implements {@link Deleted}.
057   *
058   * @author <a href="https://about.me/lairdnelson"
059   * target="_parent">Laird Nelson</a>
060   */
061  public static final class Literal extends AnnotationLiteral<Deleted> implements Deleted {
062
063
064    /*
065     * Static fields.
066     */
067
068
069    private static final long serialVersionUID = 1L;
070
071    /**
072     * A {@link Deleted} instance.
073     *
074     * <p>This field is never {@code null}.</p>
075     */
076    public static final Deleted INSTANCE = new Literal();
077
078  }
079
080}