Java tutorial
/* * 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.commons.daemon; /** * Tags a Daemon as supporting some kind of * signaling method that allows the java application to * perform a custom action. * <p> * User must implement a signal method that will be called from * native upon receiving {@code SIGUSR2} signal from the operating system. * </p> * @author Nick Griffiths <nicobrevin@gmail.com> * @author Mladen Turk <mturk@apache.org> * @version $Id: DaemonUserSignal.java 1204010 2011-11-19 16:15:23Z ggregory $ */ public interface DaemonUserSignal { /** * Performs a custom action on received user signal. */ void signal(); }