001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.impl;
020
021/**
022 * Lifecycle managing component for repository system.
023 *
024 * @noimplement This interface is not intended to be implemented by clients.
025 * @noextend This interface is not intended to be extended by clients.
026 * @provisional This type is provisional and can be changed, moved or removed without prior notice.
027 * @since 1.9.0
028 */
029public interface RepositorySystemLifecycle {
030    /**
031     * Marks the repository system as ended (shut down): all "on close" handlers will be invoked. This method may be
032     * invoked multiple times, only once will execute, subsequent calls will be no-op.
033     */
034    void systemEnded();
035
036    /**
037     * Registers an "on repository system end" handler.
038     * <p>
039     * Throws if repository system is already shut down.
040     */
041    void addOnSystemEndedHandler(Runnable handler);
042}