flink timer定时器

 

        SingleOutputStreamOperator<DataBean> watered = maped.assignTimestampsAndWatermarks(WatermarkStrategy.<DataBean>forBoundedOutOfOrderness(Duration.ZERO).withIdleness(Duration.ofMinutes(1)).withTimestampAssigner(new SerializableTimestampAssigner<DataBean>() {
            @Override
            public long extractTimestamp(DataBean dataBean, long l) {
                return dataBean.getTs();
            }
        }));

        watered.keyBy(DataBean::getGuid).process(new KeyedProcessFunction<Long, DataBean, String>() {
            @Override
            public void processElement(DataBean value, KeyedProcessFunction<Long, DataBean, String>.Context ctx, Collector<String> out) throws Exception {
                System.out.println("事件时间:" + value.getTs());
                long timermark = value.getTs() + 3000L;
                System.out.println("注册的timermark:" + timermark);
                ctx.timerService().registerEventTimeTimer(timermark);
                out.collect(JSONUtil.toJsonStr(value));
            }

            @Override
            public void onTimer(long timestamp, KeyedProcessFunction<Long, DataBean, String>.OnTimerContext ctx, Collector<String> out) throws Exception {
                System.out.println("触发了" + timestamp + "当前watermark：" + ctx.timerService().currentWatermark());
            }

        }).print();