/hudson-core/src/main/java/hudson/triggers/SafeTimerTask.java

http://github.com/hudson/hudson · Java · 65 lines · 21 code · 7 blank · 37 comment · 0 complexity · d5adf5ac0cf31d525340ff364afbfd57 MD5 · raw file

  1. /*
  2. * The MIT License
  3. *
  4. * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
  5. *
  6. * Permission is hereby granted, free of charge, to any person obtaining a copy
  7. * of this software and associated documentation files (the "Software"), to deal
  8. * in the Software without restriction, including without limitation the rights
  9. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10. * copies of the Software, and to permit persons to whom the Software is
  11. * furnished to do so, subject to the following conditions:
  12. *
  13. * The above copyright notice and this permission notice shall be included in
  14. * all copies or substantial portions of the Software.
  15. *
  16. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22. * THE SOFTWARE.
  23. */
  24. package hudson.triggers;
  25. import org.acegisecurity.context.SecurityContextHolder;
  26. import java.util.Timer;
  27. import java.util.TimerTask;
  28. import java.util.logging.Logger;
  29. import java.util.logging.Level;
  30. import hudson.security.ACL;
  31. /**
  32. * {@link Timer} wrapper so that a fatal error in {@link TimerTask}
  33. * won't terminate the timer.
  34. *
  35. * <p>
  36. * {@link Trigger#timer} is a shared timer instance that can be used inside Hudson to
  37. * schedule a recurring work.
  38. *
  39. * @author Kohsuke Kawaguchi
  40. * @since 1.124
  41. * @see Trigger#timer
  42. */
  43. public abstract class SafeTimerTask extends TimerTask {
  44. public final void run() {
  45. // background activity gets system credential,
  46. // just like executors get it.
  47. SecurityContextHolder.getContext().setAuthentication(ACL.SYSTEM);
  48. try {
  49. doRun();
  50. } catch(Throwable t) {
  51. LOGGER.log(Level.SEVERE, "Timer task "+this+" failed",t);
  52. } finally {
  53. SecurityContextHolder.clearContext();
  54. }
  55. }
  56. protected abstract void doRun() throws Exception;
  57. private static final Logger LOGGER = Logger.getLogger(SafeTimerTask.class.getName());
  58. }