content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.ambari.server.state;
  
  /**
   * The {@link NotificationState} class represents the various states that an
   * outbound notification can exist in. It allows tracking and history for
   * notifications that are pending, have succeeded, or were processed but failed
   * to be sent successfully.
   */
  public enum NotificationState {
  
    /**
     * The notification has not yet been processed by the notification system.
     */
    PENDING,
  
    /**
     * The notification was processed, but failed to be sent. It will not be
     * processed again.
     */
    FAILED,
  
    /**
     * The notification was processed successfully.
     */
    DELIVERED,
  
    /**
     * The notification was picked up and processed by the dispatcher, but there
     * is no information on whether the delivery was successful.
     */
    DISPATCHED;
  }
  