Flink 基于时间窗口的自定义CountTrigger

最新推荐文章于 2024-12-23 11:37:53 发布

ooobenooo

最新推荐文章于 2024-12-23 11:37:53 发布

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分类专栏： Flink

本文链接：https://blog.youkuaiyun.com/ooobenooo/article/details/105505593

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原理：结合Flink源码中的CountTrigger和EventTimeTrigger逻辑即可。

package net.ben.flink.hbase.function.trigger;

import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.common.state.ReducingState;
import org.apache.flink.api.common.state.ReducingStateDescriptor;
import org.apache.flink.api.common.typeutils.base.LongSerializer;
import org.apache.flink.streaming.api.windowing.triggers.Trigger;
import org.apache.flink.streaming.api.windowing.triggers.TriggerResult;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class CustomCountTriggerWithEventTime<T> extends Trigger<T, TimeWindow> {

    /**
     *
     */
    private static final long serialVersionUID = 6021946857731563476L;
    private static final Logger LOG = LoggerFactory.getLogger(CustomCountTriggerWithEventTime.class);

    private final long maxCount;

    priv