plugins/svn4idea/src/org/jetbrains/idea/svn/ReentranceDefence.java

   1 package org.jetbrains.idea.svn;
   2
   3 public class ReentranceDefence {
   4   protected final ThreadLocal<Boolean> myThreadLocal;
   5
   6   protected ReentranceDefence() {
   7     myThreadLocal = new ThreadLocal<Boolean>() {
   8       @Override
   9       protected Boolean initialValue() {
  10         return Boolean.TRUE;
  11       }
  12     };
  13   }
  14
  15   public static <T> T executeReentrant(final ReentranceDefence defence, final MyControlled<T> controlled) {
  16     if (defence.isInside()) {
  17       return controlled.executeMeSimple();
  18     }
  19     return controlled.executeMe();
  20   }
  21
  22   public boolean isInside() {
  23     return ! Boolean.TRUE.equals(myThreadLocal.get());
  24   }
  25
  26   public boolean isOutside() {
  27     return ! isInside();
  28   }
  29
  30   public void executeOtherDefended(final Runnable runnable) {
  31     try {
  32       myThreadLocal.set(Boolean.FALSE);
  33       runnable.run();
  34     } finally {
  35       myThreadLocal.set(Boolean.TRUE);
  36     }
  37   }
  38
  39   public interface MyControlled<T> {
  40     T executeMe();
  41     T executeMeSimple();
  42   }
  43 }