Java Code Examples for org.apache.flink.runtime.jobmanager.scheduler.CoLocationConstraint#lockLocation()

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Example 1
Source File: SharedSlotsTest.java    From Flink-CEPplus with Apache License 2.0 4 votes vote down vote up 
/**
 * We allocate and the structure below and release it from the root.
 *
 * <pre>
 *     Shared(0)(root)
 *        |
 *        +-- Simple(2)(sink)
 *        |
 *        +-- Shared(1)(co-location-group)
 *        |      |
 *        |      +-- Simple(0)(tail)
 *        |      +-- Simple(1)(head)
 *        |
 *        +-- Simple(0)(source)
 * </pre>
 */
@Test
public void testReleaseTwoLevelsFromRoot() {
	try {
		JobVertexID sourceId = new JobVertexID();
		JobVertexID headId = new JobVertexID();
		JobVertexID tailId = new JobVertexID();
		JobVertexID sinkId = new JobVertexID();

		JobVertex headVertex = new JobVertex("head", headId);
		JobVertex tailVertex = new JobVertex("tail", tailId);

		SlotSharingGroup sharingGroup = new SlotSharingGroup(sourceId, headId, tailId, sinkId);
		SlotSharingGroupAssignment assignment = sharingGroup.getTaskAssignment();
		assertEquals(0, assignment.getNumberOfSlots());

		CoLocationGroup coLocationGroup = new CoLocationGroup(headVertex, tailVertex);
		CoLocationConstraint constraint = coLocationGroup.getLocationConstraint(0);
		assertFalse(constraint.isAssigned());

		Instance instance = SchedulerTestUtils.getRandomInstance(1);

		// allocate a shared slot
		SharedSlot sharedSlot = instance.allocateSharedSlot(assignment);

		// get the first simple slot
		SimpleSlot sourceSlot = assignment.addSharedSlotAndAllocateSubSlot(sharedSlot, Locality.LOCAL, sourceId);
		
		SimpleSlot headSlot = assignment.getSlotForTask(constraint, NO_LOCATION);
		constraint.lockLocation();
		SimpleSlot tailSlot = assignment.getSlotForTask(constraint, NO_LOCATION);
		
		SimpleSlot sinkSlot = assignment.getSlotForTask(sinkId, NO_LOCATION);
		
		assertEquals(4, sharedSlot.getNumberLeaves());

		// release all
		sourceSlot.releaseSlot();
		headSlot.releaseSlot();
		tailSlot.releaseSlot();
		sinkSlot.releaseSlot();

		assertTrue(sharedSlot.isReleased());
		assertTrue(sourceSlot.isReleased());
		assertTrue(headSlot.isReleased());
		assertTrue(tailSlot.isReleased());
		assertTrue(sinkSlot.isReleased());
		assertTrue(constraint.getSharedSlot().isReleased());

		assertTrue(constraint.isAssigned());
		assertFalse(constraint.isAssignedAndAlive());

		assertEquals(1, instance.getNumberOfAvailableSlots());
		assertEquals(0, instance.getNumberOfAllocatedSlots());
		
		assertEquals(0, assignment.getNumberOfSlots());
	}
	catch (Exception e) {
		e.printStackTrace();
		fail(e.getMessage());
	}
}