001/* 002 * SonarQube, open source software quality management tool. 003 * Copyright (C) 2008-2014 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * SonarQube is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * SonarQube is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public License 017 * along with this program; if not, write to the Free Software Foundation, 018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 019 */ 020package org.sonar.process; 021 022import org.slf4j.LoggerFactory; 023 024/** 025 * This watchdog asks for graceful termination of process when the file 026 * <process_key>.stop is created in temp directory. 027 */ 028public class StopWatcher extends Thread { 029 030 private final Stoppable stoppable; 031 private final ProcessCommands commands; 032 private boolean watching = true; 033 private final long delayMs; 034 035 public StopWatcher(ProcessCommands commands, Stoppable stoppable) { 036 this(commands, stoppable, 500L); 037 } 038 039 StopWatcher(ProcessCommands commands, Stoppable stoppable, long delayMs) { 040 super("Stop Watcher"); 041 this.commands = commands; 042 this.stoppable = stoppable; 043 this.delayMs = delayMs; 044 } 045 046 @Override 047 public void run() { 048 try { 049 while (watching) { 050 if (commands.askedForStop()) { 051 LoggerFactory.getLogger(getClass()).info("Stopping process"); 052 stoppable.stopAsync(); 053 watching = false; 054 } else { 055 try { 056 Thread.sleep(delayMs); 057 } catch (InterruptedException ignored) { 058 watching = false; 059 } 060 } 061 } 062 } finally { 063 commands.endWatch(); 064 } 065 } 066 067 public void stopWatching() { 068 watching = false; 069 } 070}