/*
 * 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.karaf.main;


/**
 * <p>
 * This interface is a callback interface for the stoping process. 
 * It's main purpose is to give the ServiceWrapper a way of waiting 
 * for the Framework to gracefully stop the Server. 
 * <p>
 */
public interface ShutdownCallback {

	/**
	 * The callback method invoked to inform anyone listening that the 
	 * Main class is still waiting for the completion of the shutdown. 
	 */
	void waitingForShutdown(int delay);

}
