001package org.eclipse.aether.impl;
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 * Lifecycle managing component for repository system.
024 *
025 * @noimplement This interface is not intended to be implemented by clients.
026 * @noextend This interface is not intended to be extended by clients.
027 * @provisional This type is provisional and can be changed, moved or removed without prior notice.
028 * @since 1.9.0
029 */
030public interface RepositorySystemLifecycle
031{
032    /**
033     * Marks the repository system as ended (shut down): all "on close" handlers will be invoked. This method may be
034     * invoked multiple times, only once will execute, subsequent calls will be no-op.
035     */
036    void systemEnded();
037
038    /**
039     * Registers an "on repository system end" handler.
040     * <p>
041     * Throws if repository system is already shut down.
042     */
043    void addOnSystemEndedHandler( Runnable handler );
044}