Package java.lang.ref

Examples of java.lang.ref.SoftReference.enqueue()

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  public void test_poll() {
    // store in a static so it won't be gc'ed because the jit
    // optimized it out
    b = new Boolean(true);
    SoftReference sr = new SoftReference(b, rq);
    sr.enqueue();
    try {
      assertTrue("Remove failed.", ((Boolean) rq.poll().get())
          .booleanValue());
    } catch (Exception e) {
      fail("Exception during the test : " + e.getMessage());
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  public void test_remove() {
    // store in a static so it won't be gc'ed because the jit
    // optimized it out
    b = new Boolean(true);
    SoftReference sr = new SoftReference(b, rq);
    sr.enqueue();
    try {
      assertTrue("Remove failed.", ((Boolean) rq.remove().get())
          .booleanValue());
    } catch (Exception e) {
      fail("Exception during the test : " + e.getMessage());
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      synchronized (rq) {
        // store in a static so it won't be gc'ed because the jit
        // optimized it out
        integer = new Integer(667);
        SoftReference sr = new SoftReference(integer, rq);
        sr.enqueue();
        rq.notify();
      }
    }
  }
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  public void test_enqueue() {
    ReferenceQueue rq = new ReferenceQueue();
    obj = new Object();
    Reference ref = new SoftReference(obj, rq);
    assertTrue("Enqueue failed.", (!ref.isEnqueued())
        && ((ref.enqueue()) && (ref.isEnqueued())));
    assertTrue("Not properly enqueued.", rq.poll().get() == obj);
    // This fails...
    assertTrue("Should remain enqueued.", !ref.isEnqueued());
    assertTrue("Can not enqueue twice.", (!ref.enqueue())
        && (rq.poll() == null));
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    assertTrue("Enqueue failed.", (!ref.isEnqueued())
        && ((ref.enqueue()) && (ref.isEnqueued())));
    assertTrue("Not properly enqueued.", rq.poll().get() == obj);
    // This fails...
    assertTrue("Should remain enqueued.", !ref.isEnqueued());
    assertTrue("Can not enqueue twice.", (!ref.enqueue())
        && (rq.poll() == null));

    rq = new ReferenceQueue();
    obj = new Object();
    ref = new WeakReference(obj, rq);
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    rq = new ReferenceQueue();
    obj = new Object();
    ref = new WeakReference(obj, rq);
    assertTrue("Enqueue failed2.", (!ref.isEnqueued())
        && ((ref.enqueue()) && (ref.isEnqueued())));
    assertTrue("Not properly enqueued2.", rq.poll().get() == obj);
    assertTrue("Should remain enqueued2.", !ref.isEnqueued()); // This
    // fails.
    assertTrue("Can not enqueue twice2.", (!ref.enqueue())
        && (rq.poll() == null));
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    assertTrue("Enqueue failed2.", (!ref.isEnqueued())
        && ((ref.enqueue()) && (ref.isEnqueued())));
    assertTrue("Not properly enqueued2.", rq.poll().get() == obj);
    assertTrue("Should remain enqueued2.", !ref.isEnqueued()); // This
    // fails.
    assertTrue("Can not enqueue twice2.", (!ref.enqueue())
        && (rq.poll() == null));
  }

  /**
   * @tests java.lang.ref.Reference#enqueue()
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  public void test_isEnqueued() {
    ReferenceQueue rq = new ReferenceQueue();
    obj = new Object();
    Reference ref = new SoftReference(obj, rq);
    assertTrue("Should start off not enqueued.", !ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should now be enqueued.", ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should still be enqueued.", ref.isEnqueued());
    rq.poll();
    // This fails ...
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    obj = new Object();
    Reference ref = new SoftReference(obj, rq);
    assertTrue("Should start off not enqueued.", !ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should now be enqueued.", ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should still be enqueued.", ref.isEnqueued());
    rq.poll();
    // This fails ...
    assertTrue("Should now be not enqueued.", !ref.isEnqueued());
  }
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  public void test_poll() {
    // store in a static so it won't be gc'ed because the jit
    // optimized it out
    b = new Boolean(true);
    SoftReference sr = new SoftReference(b, rq);
    sr.enqueue();
                assertTrue("Remove failed.", ((Boolean) rq.poll().get())
                                .booleanValue());
  }

  /**
 
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