Examples with PurgingTrigger org.apache.flink.streaming.api.windowing.triggers.PurgingTrigger used on opensource projects

Example 1 with PurgingTrigger

use of org.apache.flink.streaming.api.windowing.triggers.PurgingTrigger in project flink by apache.

the class DataStreamTest method testWindowOperatorDescription.

/**
 * Tests that verifies window operator has different name and description.
 */
@Test
public void testWindowOperatorDescription() {
    // global window
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    DataStream<Long> dataStream1 = env.generateSequence(0, 0).windowAll(GlobalWindows.create()).trigger(PurgingTrigger.of(CountTrigger.of(10))).reduce(new ReduceFunction<Long>() {

        private static final long serialVersionUID = 1L;

        @Override
        public Long reduce(Long value1, Long value2) throws Exception {
            return null;
        }
    });
    // name is simplified
    assertEquals("GlobalWindows", dataStream1.getTransformation().getName());
    // description contains detail of function:
    // TriggerWindow(GlobalWindows(), ReducingStateDescriptor{name=window-contents,
    // defaultValue=null,
    // serializer=org.apache.flink.api.common.typeutils.base.LongSerializer@6af9fcb2},
    // PurgingTrigger(CountTrigger(10)), AllWindowedStream.reduce(AllWindowedStream.java:229))
    assertTrue(dataStream1.getTransformation().getDescription().contains("PurgingTrigger"));
    // keyed window
    DataStream<Long> dataStream2 = env.generateSequence(0, 0).keyBy(value -> value).window(TumblingEventTimeWindows.of(Time.milliseconds(1000))).trigger(PurgingTrigger.of(CountTrigger.of(10))).reduce(new ReduceFunction<Long>() {

        private static final long serialVersionUID = 1L;

        @Override
        public Long reduce(Long value1, Long value2) throws Exception {
            return null;
        }
    });
    // name is simplified
    assertEquals("TumblingEventTimeWindows", dataStream2.getTransformation().getName());
    // description contains detail of function:
    // Window(TumblingEventTimeWindows(1000), PurgingTrigger, ReduceFunction$36,
    // PassThroughWindowFunction)
    assertTrue(dataStream2.getTransformation().getDescription().contains("PurgingTrigger"));
}