| /* |
| * 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.geode.cache; |
| |
| /** |
| * User-defined objects that can be plugged into caching to receive callback notifications. |
| * |
| * |
| * @since GemFire 3.0 |
| */ |
| public interface CacheCallback extends Declarable { |
| /** |
| * Called when the region containing this callback is closed or destroyed, when the cache is |
| * closed, or when a callback is removed from a region using an <code>AttributesMutator</code>. |
| * |
| * <p> |
| * Implementations should cleanup any external resources such as database connections. Any runtime |
| * exceptions this method throws will be logged. |
| * |
| * <p> |
| * It is possible for this method to be called multiple times on a single callback instance, so |
| * implementations must be tolerant of this. |
| * |
| * @see Cache#close() |
| * @see Region#close |
| * @see Region#localDestroyRegion() |
| * @see Region#destroyRegion() |
| * @see AttributesMutator |
| */ |
| default void close() {}; |
| } |
