001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.microservice;
014
015import org.apache.juneau.config.event.*;
016
017/**
018 * Listener class for microservice lifecycle events.
019 *
020 * <h5 class='section'>See Also:</h5><ul>
021 *    <li class='link'><a class="doclink" href="../../../../index.html#juneau-microservice-core">juneau-microservice-core</a>
022 * </ul>
023 */
024public interface MicroserviceListener {
025
026   /**
027    * Called at the beginning of the {@link Microservice#start()} call.
028    *
029    * @param microservice Reference to microservice.
030    */
031   void onStart(Microservice microservice);
032
033   /**
034    * Called at the end of the {@link Microservice#stop()} call.
035    *
036    * @param microservice Reference to microservice.
037    */
038   void onStop(Microservice microservice);
039
040   /**
041    * Called if one or more changes occur in the config file.
042    *
043    * @param microservice Reference to microservice.
044    * @param events The list of changes in the config file.
045    */
046   void onConfigChange(Microservice microservice, ConfigEvents events);
047}