@Override
  public void containerAllocated(S schedulableEntity,
    RMContainer r) {
      entityRequiresReordering(schedulableEntity);
    }
@Test
  public void testIterators() {
    OrderingPolicy<MockSchedulableEntity> schedOrder =
     new FairOrderingPolicy<MockSchedulableEntity>();

    MockSchedulableEntity msp1 = new MockSchedulableEntity();
    MockSchedulableEntity msp2 = new MockSchedulableEntity();
    MockSchedulableEntity msp3 = new MockSchedulableEntity();

    msp1.setId("1");
    msp2.setId("2");
    msp3.setId("3");

    msp1.setUsed(Resources.createResource(3));
    msp2.setUsed(Resources.createResource(2));
    msp3.setUsed(Resources.createResource(1));

    AbstractComparatorOrderingPolicy.updateSchedulingResourceUsage(
      msp1.getSchedulingResourceUsage());
    AbstractComparatorOrderingPolicy.updateSchedulingResourceUsage(
      msp2.getSchedulingResourceUsage());
    AbstractComparatorOrderingPolicy.updateSchedulingResourceUsage(
      msp2.getSchedulingResourceUsage());

    schedOrder.addSchedulableEntity(msp1);
    schedOrder.addSchedulableEntity(msp2);
    schedOrder.addSchedulableEntity(msp3);


    //Assignment, least to greatest consumption
    checkIds(schedOrder.getAssignmentIterator(
        IteratorSelector.EMPTY_ITERATOR_SELECTOR),
        new String[]{"3", "2", "1"});

    //Preemption, greatest to least
    checkIds(schedOrder.getPreemptionIterator(), new String[]{"1", "2", "3"});

    //Change value without inform, should see no change
    msp2.setUsed(Resources.createResource(6));
    checkIds(schedOrder.getAssignmentIterator(
        IteratorSelector.EMPTY_ITERATOR_SELECTOR),
        new String[]{"3", "2", "1"});
    checkIds(schedOrder.getPreemptionIterator(), new String[]{"1", "2", "3"});

    //Do inform, will reorder
    schedOrder.containerAllocated(msp2, null);
    checkIds(schedOrder.getAssignmentIterator(
        IteratorSelector.EMPTY_ITERATOR_SELECTOR),
        new String[]{"3", "1", "2"});
    checkIds(schedOrder.getPreemptionIterator(), new String[]{"2", "1", "3"});
  }