| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.sjavac.server; |
| |
| import com.sun.tools.sjavac.Log; |
| |
| import java.io.IOException; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| /** |
| * Monitors the presence of a port file and shuts down the given SjavacServer |
| * whenever the port file is deleted or invalidated. |
| * |
| * TODO: JDK-8046882 |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class PortFileMonitor { |
| |
| // Check if the portfile is gone, every 5 seconds. |
| private final static int CHECK_PORTFILE_INTERVAL = 5000; |
| |
| final private Timer timer = new Timer(); |
| final private PortFile portFile; |
| final private SjavacServer server; |
| |
| public PortFileMonitor(PortFile portFile, |
| SjavacServer server) { |
| this.portFile = portFile; |
| this.server = server; |
| } |
| |
| public void start() { |
| Log log = Log.get(); |
| TimerTask shutdownCheck = new TimerTask() { |
| public void run() { |
| Log.setLogForCurrentThread(log); |
| Log.debug("Checking port file status..."); |
| try { |
| if (!portFile.exists()) { |
| // Time to quit because the portfile was deleted by another |
| // process, probably by the makefile that is done building. |
| server.shutdown("Quitting because portfile was deleted!"); |
| } else if (portFile.markedForStop()) { |
| // Time to quit because another process touched the file |
| // server.port.stop to signal that the server should stop. |
| // This is necessary on some operating systems that lock |
| // the port file hard! |
| server.shutdown("Quitting because a portfile.stop file was found!"); |
| } else if (!portFile.stillMyValues()) { |
| // Time to quit because another build has started. |
| server.shutdown("Quitting because portfile is now owned by another javac server!"); |
| } |
| } catch (IOException e) { |
| Log.error("IOException caught in PortFileMonitor."); |
| Log.debug(e); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| Log.error(e); |
| } |
| } |
| }; |
| |
| timer.schedule(shutdownCheck, 0, CHECK_PORTFILE_INTERVAL); |
| } |
| |
| public void shutdown() { |
| timer.cancel(); |
| } |
| } |