russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
88 lines
3.2 KiB
Java
88 lines
3.2 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.IOException;
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import java.io.UncheckedIOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.StandardOpenOption;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.List;
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public class UseShutdownHook {
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public static void main(String[] args) throws InterruptedException {
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trace("Started");
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var outputFile = Path.of(args[0]);
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trace(String.format("Write output in [%s] file", outputFile));
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var shutdownTimeoutSeconds = Integer.parseInt(args[1]);
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trace(String.format("Automatically shutdown the app in %ss", shutdownTimeoutSeconds));
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Runtime.getRuntime().addShutdownHook(new Thread() {
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@Override
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public void run() {
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output(outputFile, "shutdown hook executed");
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}
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});
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var startTime = System.currentTimeMillis();
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var lock = new Object();
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do {
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synchronized (lock) {
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lock.wait(shutdownTimeoutSeconds * 1000);
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}
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} while ((System.currentTimeMillis() - startTime) < (shutdownTimeoutSeconds * 1000));
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output(outputFile, "exit");
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}
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private static void output(Path outputFilePath, String msg) {
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trace(String.format("Writing [%s] into [%s]", msg, outputFilePath));
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try {
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Files.createDirectories(outputFilePath.getParent());
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Files.writeString(outputFilePath, msg, StandardOpenOption.APPEND, StandardOpenOption.CREATE);
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} catch (IOException ex) {
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throw new UncheckedIOException(ex);
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}
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}
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private static void trace(String msg) {
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Date time = new Date(System.currentTimeMillis());
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msg = String.format("UseShutdownHook [%s]: %s", SDF.format(time), msg);
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System.out.println(msg);
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try {
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Files.write(traceFile, List.of(msg), StandardOpenOption.APPEND, StandardOpenOption.CREATE);
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} catch (IOException ex) {
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throw new UncheckedIOException(ex);
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}
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}
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private static final SimpleDateFormat SDF = new SimpleDateFormat("HH:mm:ss.SSS");
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private static final Path traceFile = Path.of(System.getProperty("jpackage.test.trace-file"));
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}
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