Examples with Timer org.apache.beam.sdk.state.Timer used on opensource projects

Example 11 with Timer

use of org.apache.beam.sdk.state.Timer in project beam by apache.

the class ParDoTest method testEventTimeTimerAlignUnbounded.

@Test
@Category({ NeedsRunner.class, UsesTimersInParDo.class, UsesTestStream.class })
public void testEventTimeTimerAlignUnbounded() throws Exception {
    final String timerId = "foo";
    DoFn<KV<String, Integer>, KV<Integer, Instant>> fn = new DoFn<KV<String, Integer>, KV<Integer, Instant>>() {

        @TimerId(timerId)
        private final TimerSpec spec = TimerSpecs.timer(TimeDomain.EVENT_TIME);

        @ProcessElement
        public void processElement(ProcessContext context, @TimerId(timerId) Timer timer) {
            timer.align(Duration.standardSeconds(1)).offset(Duration.millis(1)).setRelative();
            context.output(KV.of(3, context.timestamp()));
        }

        @OnTimer(timerId)
        public void onTimer(OnTimerContext context) {
            context.output(KV.of(42, context.timestamp()));
        }
    };
    TestStream<KV<String, Integer>> stream = TestStream.create(KvCoder.of(StringUtf8Coder.of(), VarIntCoder.of())).advanceWatermarkTo(new Instant(5)).addElements(KV.of("hello", 37)).advanceWatermarkTo(new Instant(0).plus(Duration.standardSeconds(1).plus(1))).advanceWatermarkToInfinity();
    PCollection<KV<Integer, Instant>> output = pipeline.apply(stream).apply(ParDo.of(fn));
    PAssert.that(output).containsInAnyOrder(KV.of(3, new Instant(5)), KV.of(42, new Instant(Duration.standardSeconds(1).minus(1).getMillis())));
    pipeline.run();
}

Example 12 with Timer

use of org.apache.beam.sdk.state.Timer in project beam by apache.

the class ParDoTest method testTimerReceivedInOriginalWindow.

@Test
@Category({ ValidatesRunner.class, UsesTimersInParDo.class })
public void testTimerReceivedInOriginalWindow() throws Exception {
    final String timerId = "foo";
    DoFn<KV<String, Integer>, BoundedWindow> fn = new DoFn<KV<String, Integer>, BoundedWindow>() {

        @TimerId(timerId)
        private final TimerSpec spec = TimerSpecs.timer(TimeDomain.EVENT_TIME);

        @ProcessElement
        public void processElement(ProcessContext context, @TimerId(timerId) Timer timer) {
            timer.offset(Duration.standardSeconds(1)).setRelative();
        }

        @OnTimer(timerId)
        public void onTimer(OnTimerContext context, BoundedWindow window) {
            context.output(context.window());
        }

        public TypeDescriptor<BoundedWindow> getOutputTypeDescriptor() {
            return (TypeDescriptor) TypeDescriptor.of(IntervalWindow.class);
        }
    };
    SlidingWindows windowing = SlidingWindows.of(Duration.standardMinutes(3)).every(Duration.standardMinutes(1));
    PCollection<BoundedWindow> output = pipeline.apply(Create.timestamped(TimestampedValue.of(KV.of("hello", 24), new Instant(0L)))).apply(Window.<KV<String, Integer>>into(windowing)).apply(ParDo.of(fn));
    PAssert.that(output).containsInAnyOrder(new IntervalWindow(new Instant(0), Duration.standardMinutes(3)), new IntervalWindow(new Instant(0).minus(Duration.standardMinutes(1)), Duration.standardMinutes(3)), new IntervalWindow(new Instant(0).minus(Duration.standardMinutes(2)), Duration.standardMinutes(3)));
    pipeline.run();
}

Example 13 with Timer

use of org.apache.beam.sdk.state.Timer in project beam by apache.

the class ParDoTest method testEventTimeTimerAbsolute.

/**
   * Tests that an event time timer set absolutely for the last possible moment fires and results in
   * supplementary output. The test is otherwise identical to {@link #testEventTimeTimerBounded()}.
   */
@Test
@Category({ ValidatesRunner.class, UsesTimersInParDo.class })
public void testEventTimeTimerAbsolute() throws Exception {
    final String timerId = "foo";
    DoFn<KV<String, Integer>, Integer> fn = new DoFn<KV<String, Integer>, Integer>() {

        @TimerId(timerId)
        private final TimerSpec spec = TimerSpecs.timer(TimeDomain.EVENT_TIME);

        @ProcessElement
        public void processElement(ProcessContext context, @TimerId(timerId) Timer timer, BoundedWindow window) {
            timer.set(window.maxTimestamp());
            context.output(3);
        }

        @OnTimer(timerId)
        public void onTimer(OnTimerContext context) {
            context.output(42);
        }
    };
    PCollection<Integer> output = pipeline.apply(Create.of(KV.of("hello", 37))).apply(ParDo.of(fn));
    PAssert.that(output).containsInAnyOrder(3, 42);
    pipeline.run();
}