@Test
public void testKeyValueStateInWindowFunction() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final CollectingOutput<Integer> out = new CollectingOutput<>(50);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
StatefulFunction.globalCounts.clear();
// tumbling window that triggers every 20 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
new StatefulFunction(),
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
50,
50);
op.setup(mockTask, createTaskConfig(identitySelector, IntSerializer.INSTANCE), out);
op.open();
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(1));
op.processElement(new StreamRecord<Integer>(2));
}
out.waitForNElements(2, 60000);
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(1));
op.processElement(new StreamRecord<Integer>(2));
op.processElement(new StreamRecord<Integer>(1));
op.processElement(new StreamRecord<Integer>(1));
op.processElement(new StreamRecord<Integer>(2));
op.processElement(new StreamRecord<Integer>(2));
}
out.waitForNElements(8, 60000);
List<Integer> result = out.getElements();
assertEquals(8, result.size());
Collections.sort(result);
assertEquals(Arrays.asList(1, 1, 1, 1, 2, 2, 2, 2), result);
assertEquals(4, StatefulFunction.globalCounts.get(1).intValue());
assertEquals(4, StatefulFunction.globalCounts.get(2).intValue());
synchronized (lock) {
op.close();
}
op.dispose();
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}
@Test
public void testPropagateExceptionsFromClose() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final CollectingOutput<Integer> out = new CollectingOutput<>();
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
WindowFunction<Integer, Integer, Integer, TimeWindow> failingFunction =
new FailingFunction(100);
// the operator has a window time that is so long that it will not fire in this test
final long hundredYears = 100L * 365 * 24 * 60 * 60 * 1000;
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
failingFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
hundredYears,
hundredYears);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
for (int i = 0; i < 150; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
}
try {
synchronized (lock) {
op.close();
}
fail("This should fail with an exception");
} catch (Exception e) {
assertTrue(
e.getMessage().contains("Artificial Test Exception")
|| (e.getCause() != null
&& e.getCause().getMessage().contains("Artificial Test Exception")));
}
op.dispose();
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}
@Test
public void testTumblingWindow() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final int windowSize = 50;
final CollectingOutput<Integer> out = new CollectingOutput<>(windowSize);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// tumbling window that triggers every 20 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSize);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
final int numElements = 1000;
for (int i = 0; i < numElements; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
synchronized (lock) {
op.close();
}
op.dispose();
// get and verify the result
List<Integer> result = out.getElements();
assertEquals(numElements, result.size());
Collections.sort(result);
for (int i = 0; i < numElements; i++) {
assertEquals(i, result.get(i).intValue());
}
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}
@Test
public void testSlidingWindowSingleElements() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final CollectingOutput<Integer> out = new CollectingOutput<>(50);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// tumbling window that triggers every 20 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
150,
50);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(1));
op.processElement(new StreamRecord<Integer>(2));
}
// each element should end up in the output three times
// wait until the elements have arrived 6 times in the output
out.waitForNElements(6, 120000);
List<Integer> result = out.getElements();
assertEquals(6, result.size());
Collections.sort(result);
assertEquals(Arrays.asList(1, 1, 1, 2, 2, 2), result);
synchronized (lock) {
op.close();
}
op.dispose();
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}
@Test
public void testEmitTrailingDataOnClose() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final CollectingOutput<Integer> out = new CollectingOutput<>();
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// the operator has a window time that is so long that it will not fire in this test
final long oneYear = 365L * 24 * 60 * 60 * 1000;
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
oneYear,
oneYear);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
List<Integer> data = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
for (Integer i : data) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
}
synchronized (lock) {
op.close();
}
op.dispose();
// get and verify the result
List<Integer> result = out.getElements();
Collections.sort(result);
assertEquals(data, result);
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}
@Test
public void checkpointRestoreWithPendingWindowSliding() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final int factor = 4;
final int windowSlide = 50;
final int windowSize = factor * windowSlide;
final CollectingOutput<Integer> out = new CollectingOutput<>(windowSlide);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// sliding window (200 msecs) every 50 msecs
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSlide);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
// inject some elements
final int numElements = 1000;
final int numElementsFirst = 700;
for (int i = 0; i < numElementsFirst; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
// draw a snapshot
StreamTaskState state;
List<Integer> resultAtSnapshot;
synchronized (lock) {
int beforeSnapShot = out.getElements().size();
state = op.snapshotOperatorState(1L, System.currentTimeMillis());
resultAtSnapshot = new ArrayList<>(out.getElements());
int afterSnapShot = out.getElements().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++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
op.dispose();
// re-create the operator and restore the state
final CollectingOutput<Integer> out2 = new CollectingOutput<>(windowSlide);
op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSlide);
op.setup(mockTask, new StreamConfig(new Configuration()), out2);
op.restoreState(state, 1);
op.open();
// inject again the remaining elements
for (int i = numElementsFirst; i < numElements; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
// for a deterministic result, we need to wait until all pending triggers
// have fired and emitted their results
long deadline = System.currentTimeMillis() + 120000;
do {
Thread.sleep(20);
} while (resultAtSnapshot.size() + out2.getElements().size() < factor * numElements
&& System.currentTimeMillis() < deadline);
synchronized (lock) {
op.close();
}
op.dispose();
// get and verify the result
List<Integer> finalResult = new ArrayList<>(resultAtSnapshot);
finalResult.addAll(out2.getElements());
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());
} finally {
timerService.shutdown();
}
}
@Test
public void checkpointRestoreWithPendingWindowTumbling() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final int windowSize = 200;
final CollectingOutput<Integer> out = new CollectingOutput<>(windowSize);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// tumbling window that triggers every 50 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSize);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
// inject some elements
final int numElementsFirst = 700;
final int numElements = 1000;
for (int i = 0; i < numElementsFirst; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
// draw a snapshot and dispose the window
StreamTaskState state;
List<Integer> resultAtSnapshot;
synchronized (lock) {
int beforeSnapShot = out.getElements().size();
state = op.snapshotOperatorState(1L, System.currentTimeMillis());
resultAtSnapshot = new ArrayList<>(out.getElements());
int afterSnapShot = out.getElements().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++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i + numElementsFirst));
}
Thread.sleep(1);
}
op.dispose();
// re-create the operator and restore the state
final CollectingOutput<Integer> out2 = new CollectingOutput<>(windowSize);
op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
windowSize,
windowSize);
op.setup(mockTask, new StreamConfig(new Configuration()), out2);
op.restoreState(state, 1);
op.open();
// inject some more elements
for (int i = numElementsFirst; i < numElements; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
synchronized (lock) {
op.close();
}
op.dispose();
// get and verify the result
List<Integer> finalResult = new ArrayList<>(resultAtSnapshot);
finalResult.addAll(out2.getElements());
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());
} finally {
timerService.shutdown();
}
}
@Test
public void testSlidingWindow() {
final ScheduledExecutorService timerService = Executors.newSingleThreadScheduledExecutor();
try {
final CollectingOutput<Integer> out = new CollectingOutput<>(50);
final Object lock = new Object();
final StreamTask<?, ?> mockTask = createMockTaskWithTimer(timerService, lock);
// tumbling window that triggers every 20 milliseconds
AccumulatingProcessingTimeWindowOperator<Integer, Integer, Integer> op =
new AccumulatingProcessingTimeWindowOperator<>(
validatingIdentityFunction,
identitySelector,
IntSerializer.INSTANCE,
IntSerializer.INSTANCE,
150,
50);
op.setup(mockTask, new StreamConfig(new Configuration()), out);
op.open();
final int numElements = 1000;
for (int i = 0; i < numElements; i++) {
synchronized (lock) {
op.processElement(new StreamRecord<Integer>(i));
}
Thread.sleep(1);
}
synchronized (lock) {
op.close();
}
op.dispose();
// get and verify the result
List<Integer> result = out.getElements();
// if we kept this running, each element would be in the result three times (for each slide).
// we are closing the window before the final panes are through three times, so we may have
// less
// elements.
if (result.size() < numElements || result.size() > 3 * numElements) {
fail("Wrong number of results: " + result.size());
}
Collections.sort(result);
int lastNum = -1;
int lastCount = -1;
for (int num : result) {
if (num == lastNum) {
lastCount++;
assertTrue(lastCount <= 3);
} else {
lastNum = num;
lastCount = 1;
}
}
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
} finally {
timerService.shutdown();
}
}