001/*
002 * Copyright 2012-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.loader.tools;
018
019import sun.misc.Signal;
020import sun.misc.SignalHandler;
021
022/**
023 * Utilities for working with signal handling.
024 *
025 * @author Dave Syer
026 * @since 1.1.0
027 */
028@SuppressWarnings("restriction")
029@UsesUnsafeJava
030public final class SignalUtils {
031
032        private static final Signal SIG_INT = new Signal("INT");
033
034        private SignalUtils() {
035        }
036
037        /**
038         * Handle {@literal INT} signals by calling the specified {@link Runnable}.
039         * @param runnable the runnable to call on SIGINT.
040         */
041        public static void attachSignalHandler(final Runnable runnable) {
042                Signal.handle(SIG_INT, new SignalHandler() {
043                        @Override
044                        public void handle(Signal signal) {
045                                runnable.run();
046                        }
047                });
048        }
049
050}