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 */
020public interface MicroserviceListener {
021
022   /**
023    * Called at the beginning of the {@link Microservice#start()} call.
024    *
025    * @param microservice Reference to microservice.
026    */
027   void onStart(Microservice microservice);
028
029   /**
030    * Called at the end of the {@link Microservice#stop()} call.
031    *
032    * @param microservice Reference to microservice.
033    */
034   void onStop(Microservice microservice);
035
036   /**
037    * Called if one or more changes occur in the config file.
038    *
039    * @param microservice Reference to microservice.
040    * @param events The list of changes in the config file.
041    */
042   void onConfigChange(Microservice microservice, ConfigEvents events);
043}