Allow to use cron to schedule the controller periodical tasks

描述

贡献者指南

技术栈

java

领域

backend

议题类型

feature

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

1-2 days

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

blocked

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

JavaCron syntaxPinot controller architecture

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

40

研究方向

The current schedule is based on controller start time. The goal is to support a CRON expression for periodic tasks. Examine the Pinot controller source code (e.g., in pinot controller module) to locate where tasks are currently scheduled. Consider using a cron library like Quartz or CronUtils. Review the issue comments for any design direction or constraints.