我已经为我的事件流创建了一个自定义触发器和处理函数。

DataStream<DynamoDBRow> dynamoDBRows =
    sensorEvents
        .keyBy("id")
        .window(GlobalWindows.create())
        .trigger(new MyCustomTrigger())
        .allowedLateness(Time.minutes(1)) # Note
        .process(new MyCustomWindowProcessFunction());

我的触发器基于事件参数。一旦接收到事件结束信号，mycustomwindowprocessfunction（）将应用于窗口元素。

@Slf4j
public class MyCustomTrigger extends Trigger<SensorEvent, GlobalWindow> {

  @Override
  public TriggerResult onElement(SensorEvent element, long timestamp, GlobalWindow window, TriggerContext ctx) throws Exception {

    if (element.isEventEnd() == true) {
      return TriggerResult.FIRE_AND_PURGE;
    }

    return TriggerResult.CONTINUE;
  }

  @Override
  public TriggerResult onProcessingTime(long time, GlobalWindow window, TriggerContext ctx) throws Exception {
    return TriggerResult.CONTINUE;
  }

  @Override
  public TriggerResult onEventTime(long time, GlobalWindow window, TriggerContext ctx) throws Exception {
    return TriggerResult.CONTINUE;
  }

  @Override
  public void clear(GlobalWindow window, TriggerContext ctx) throws Exception {}
}

传感器数据可能很少，甚至在触发后也可能出现。所以我补充说 .allowedLateness(Time.minutes(1)) ，以确保在处理时不会遗漏这些事件。
在我看来，允许迟到是行不通的。
翻阅文件后，我发现了这个

如何在全局窗口中包含allowedlateness？
注：我还尝试设置环境时间特性

env.setStreamTimeCharacteristic(TimeCharacteristic.IngestionTime);

更新：20-02-2020
目前正在考虑以下方法(到目前为止没有工作）

@Slf4j
public class JourneyTrigger extends Trigger<SensorEvent, GlobalWindow> {

  private final long allowedLatenessMillis;

  public JourneyTrigger(Time allowedLateness) {
    this.allowedLatenessMillis = allowedLateness.toMilliseconds();
  }

  @Override
  public TriggerResult onElement(SensorEvent element, long timestamp, GlobalWindow window, TriggerContext ctx) throws Exception {

    if (element.isEventEnd() == true) {
      log.info("Timer started with allowedLatenessMillis " + allowedLatenessMillis);
      ctx.registerEventTimeTimer(System.currentTimeMillis() + allowedLatenessMillis);
    }

    return TriggerResult.CONTINUE;
  }

  @Override
  public TriggerResult onEventTime(long time, GlobalWindow window, TriggerContext ctx) throws Exception {
    log.info("onEvenTime called at "+System.currentTimeMillis() );
    return TriggerResult.FIRE_AND_PURGE;
  }

  @Override
  public TriggerResult onProcessingTime(long time, GlobalWindow window, TriggerContext ctx) throws Exception {
    return TriggerResult.CONTINUE;
  }

  @Override
  public void clear(GlobalWindow window, TriggerContext ctx) throws Exception {}
}