@Test
public void checkpointRestoreWithPendingWindowSliding() {
try {
final int factor = 4;
final int windowSlide = 50;
final int windowSize = factor * windowSlide;
TestTimeServiceProvider timerService = new TestTimeServiceProvider();
// sliding window (200 msecs) every 50 msecs
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSlide);
OneInputStreamOperatorTestHarness<Integer, Integer> testHarness =
new OneInputStreamOperatorTestHarness<>(op, new ExecutionConfig(), timerService);
timerService.setCurrentTime(0);
testHarness.setup();
testHarness.open();
// inject some elements
final int numElements = 1000;
final int numElementsFirst = 700;
for (int i = 0; i < numElementsFirst; i++) {
testHarness.processElement(new StreamRecord<>(i));
}
// draw a snapshot
List<Integer> resultAtSnapshot = extractFromStreamRecords(testHarness.getOutput());
int beforeSnapShot = testHarness.getOutput().size();
StreamStateHandle state = testHarness.snapshot(1L, System.currentTimeMillis());
int afterSnapShot = testHarness.getOutput().size();
assertEquals("operator performed computation during snapshot", beforeSnapShot, afterSnapShot);
assertTrue(resultAtSnapshot.size() <= factor * numElementsFirst);
// inject the remaining elements - these should not influence the snapshot
for (int i = numElementsFirst; i < numElements; i++) {
testHarness.processElement(new StreamRecord<>(i));
}
op.dispose();
// re-create the operator and restore the state
op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSlide);
testHarness =
new OneInputStreamOperatorTestHarness<>(op, new ExecutionConfig(), timerService);
testHarness.setup();
testHarness.restore(state);
testHarness.open();
// inject again the remaining elements
for (int i = numElementsFirst; i < numElements; i++) {
testHarness.processElement(new StreamRecord<>(i));
}
timerService.setCurrentTime(50);
timerService.setCurrentTime(100);
timerService.setCurrentTime(150);
timerService.setCurrentTime(200);
timerService.setCurrentTime(250);
timerService.setCurrentTime(300);
timerService.setCurrentTime(350);
testHarness.close();
op.dispose();
// get and verify the result
List<Integer> finalResult = new ArrayList<>(resultAtSnapshot);
List<Integer> finalPartialResult = extractFromStreamRecords(testHarness.getOutput());
finalResult.addAll(finalPartialResult);
assertEquals(factor * numElements, finalResult.size());
Collections.sort(finalResult);
for (int i = 0; i < factor * numElements; i++) {
assertEquals(i / factor, finalResult.get(i).intValue());
}
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
@Test
public void checkpointRestoreWithPendingWindowTumbling() {
try {
final int windowSize = 200;
// tumbling window that triggers every 200 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSize);
TestTimeServiceProvider timerService = new TestTimeServiceProvider();
OneInputStreamOperatorTestHarness<Integer, Integer> testHarness =
new OneInputStreamOperatorTestHarness<>(op, new ExecutionConfig(), timerService);
testHarness.setup();
testHarness.open();
timerService.setCurrentTime(0);
// inject some elements
final int numElementsFirst = 700;
final int numElements = 1000;
for (int i = 0; i < numElementsFirst; i++) {
testHarness.processElement(new StreamRecord<>(i));
}
// draw a snapshot and dispose the window
System.out.println("GOT: " + testHarness.getOutput());
int beforeSnapShot = testHarness.getOutput().size();
StreamStateHandle state = testHarness.snapshot(1L, System.currentTimeMillis());
List<Integer> resultAtSnapshot = extractFromStreamRecords(testHarness.getOutput());
int afterSnapShot = testHarness.getOutput().size();
assertEquals("operator performed computation during snapshot", beforeSnapShot, afterSnapShot);
assertTrue(afterSnapShot <= numElementsFirst);
// inject some random elements, which should not show up in the state
for (int i = 0; i < 300; i++) {
testHarness.processElement(new StreamRecord<>(i + numElementsFirst));
}
op.dispose();
// re-create the operator and restore the state
op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSize);
testHarness =
new OneInputStreamOperatorTestHarness<>(op, new ExecutionConfig(), timerService);
testHarness.setup();
testHarness.restore(state);
testHarness.open();
// inject some more elements
for (int i = numElementsFirst; i < numElements; i++) {
testHarness.processElement(new StreamRecord<>(i));
}
timerService.setCurrentTime(400);
// get and verify the result
List<Integer> finalResult = new ArrayList<>();
finalResult.addAll(resultAtSnapshot);
List<Integer> finalPartialResult = extractFromStreamRecords(testHarness.getOutput());
finalResult.addAll(finalPartialResult);
assertEquals(numElements, finalResult.size());
Collections.sort(finalResult);
for (int i = 0; i < numElements; i++) {
assertEquals(i, finalResult.get(i).intValue());
}
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}