001package org.apache.archiva.redback.common.config.api; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022/** 023 * Receives notifications of configuration changes in thre registry. 024 */ 025public interface RegistryListener 026{ 027 028 /** 029 * Notify the object that there has been a configuration change. 030 * 031 * The method may be annotated by the {@link AsyncListener @AsyncListener} annotation. Which means the method will be 032 * executed asynchronously. 033 * 034 * @param registry the registry that was changed 035 * @param propertyName the property what was changed 036 * @param propertyValue the value the property was changed to 037 * @param oldValue The value the property had before 038 */ 039 void handleConfigurationChangeEvent( ConfigRegistry registry, EventType eventType, String propertyName, Object propertyValue, Object oldValue ); 040 041 042 043}