/hudson-remoting/src/main/java/hudson/remoting/PreloadJarTask.java

http://github.com/hudson/hudson · Java · 62 lines · 24 code · 7 blank · 31 comment · 2 complexity · 4aa6125dcc94bd77a2612780494595ca 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.remoting;
  25. import java.io.IOException;
  26. import java.net.URL;
  27. /**
  28. * {@link Callable} used to deliver a jar file to {@link RemoteClassLoader}.
  29. *
  30. * @author Kohsuke Kawaguchi
  31. */
  32. final class PreloadJarTask implements DelegatingCallable<Boolean,IOException> {
  33. /**
  34. * Jar file to be preloaded.
  35. */
  36. private final URL[] jars;
  37. private transient ClassLoader target;
  38. PreloadJarTask(URL[] jars, ClassLoader target) {
  39. this.jars = jars;
  40. this.target = target;
  41. }
  42. public ClassLoader getClassLoader() {
  43. return target;
  44. }
  45. public Boolean call() throws IOException {
  46. ClassLoader cl = Thread.currentThread().getContextClassLoader();
  47. if (!(cl instanceof RemoteClassLoader))
  48. return false;
  49. RemoteClassLoader rcl = (RemoteClassLoader) cl;
  50. boolean r = false;
  51. for (URL jar : jars)
  52. r |= rcl.prefetch(jar);
  53. return r;
  54. }
  55. }