/**
* Windows this {@code DataStream} into sliding time windows.
*
* <p>This is a shortcut for either {@code .window(SlidingEventTimeWindows.of(size, slide))} or
* {@code .window(SlidingProcessingTimeWindows.of(size, slide))} depending on the time
* characteristic set using {@link
* org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#setStreamTimeCharacteristic(org.apache.flink.streaming.api.TimeCharacteristic)}
*
* <p>Note: This operation can be inherently non-parallel since all elements have to pass through
* the same operator instance. (Only for special cases, such as aligned time windows is it
* possible to perform this operation in parallel).
*
* @param size The size of the window.
*/
public AllWindowedStream<T, TimeWindow> timeWindowAll(Time size, Time slide) {
if (environment.getStreamTimeCharacteristic() == TimeCharacteristic.ProcessingTime) {
return windowAll(SlidingProcessingTimeWindows.of(size, slide));
} else {
return windowAll(SlidingEventTimeWindows.of(size, slide));
}
}
@Test
@SuppressWarnings("unchecked")
public void testSlidingEventTimeWindowsApply() throws Exception {
closeCalled.set(0);
final int WINDOW_SIZE = 3;
final int WINDOW_SLIDE = 1;
TypeInformation<Tuple2<String, Integer>> inputType =
TypeInfoParser.parse("Tuple2<String, Integer>");
ListStateDescriptor<Tuple2<String, Integer>> stateDesc =
new ListStateDescriptor<>(
"window-contents", inputType.createSerializer(new ExecutionConfig()));
WindowOperator<
String,
Tuple2<String, Integer>,
Iterable<Tuple2<String, Integer>>,
Tuple2<String, Integer>,
TimeWindow>
operator =
new WindowOperator<>(
SlidingEventTimeWindows.of(
Time.of(WINDOW_SIZE, TimeUnit.SECONDS),
Time.of(WINDOW_SLIDE, TimeUnit.SECONDS)),
new TimeWindow.Serializer(),
new TupleKeySelector(),
BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()),
stateDesc,
new InternalIterableWindowFunction<>(new RichSumReducer<TimeWindow>()),
EventTimeTrigger.create());
operator.setInputType(inputType, new ExecutionConfig());
OneInputStreamOperatorTestHarness<Tuple2<String, Integer>, Tuple2<String, Integer>>
testHarness = new OneInputStreamOperatorTestHarness<>(operator);
testHarness.configureForKeyedStream(new TupleKeySelector(), BasicTypeInfo.STRING_TYPE_INFO);
testHarness.open();
testSlidingEventTimeWindows(testHarness);
testHarness.close();
Assert.assertEquals("Close was not called.", 1, closeCalled.get());
}