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godotg
41 lines
2.4 KiB
Markdown
41 lines
2.4 KiB
Markdown
English | [简体中文](./README_CN.md)
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### Ⅰ. Introduction
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- [scheduler](https://github.com/zfoo-project/zfoo/blob/main/scheduler/README.md) The time task scheduling bus, cron
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expression parsing uses Spring's own interpreter pattern
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### Ⅱ. Time task scheduling
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- Adjusting the local machine time before and after triggers task scheduling, and local development is very useful
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- ScheduledExecutorService.triggerPerSecond() executed every second，loop through the executable scheduler
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- zfoo believes that a program does not have much time to schedule, so the Scheduled Executor Service has only one
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thread, so users should avoid doing time-consuming and blocking operations
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- zfoo scheduler uses Javassist bytecode enhancement technology to dynamically proxy time scheduling tasks, avoiding
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reflections and no performance loss
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### Ⅲ. Cron Expression Example
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```
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30 * * * * ? Task is triggered every half minute
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30 10 * * * ? Trigger tasks every hour at 10 minutes and 30 seconds
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30 10 1 * * ? Task is triggered every day at 1:10:30 seconds
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30 10 1 20 * ? Task is triggered at 1:10:30 on the 20th of each month
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30 10 1 20 10 ? * Task is triggered every year on October 20 at 1:10:30 seconds
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30 10 1 20 10 ? 2018 Task is triggered on October 20, 2018 at 1:10:30 a.m
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30 10 1 ? 10 * 2018 Task is triggered every day on the 20th at 1:10:30 seconds In October 2018
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30 10 1 ? 10 SUN 2018 Task is triggered every Sunday in October 2018 at 1:10:30 seconds
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15,30,45 * * * * ? Task is triggered every 15, 30, 45 seconds per minute
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15-45 * * * * ? Task is triggered every second from 15 seconds to 45 seconds per minute
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15/5 * * * * ? Triggers start at 15 seconds per minute and trigger every 5 seconds
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15-30/5 * * * * ? Triggers start between 15 and 30 seconds per minute and trigger every 5 seconds
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0 0/3 * * * ? It starts at 0:0 every hour and triggers every three minutes
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0 15 10 ? * MON-FRI Triggered once a day from Monday to Friday at 10:15:00 seconds
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0 15 10 L * ? Task is triggered at 10:15:00 on the last day of each month
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0 15 10 LW * ? Task is triggered at 10:15:00 on the last working day of each month
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0 15 10 ? * 5L Task is triggered at 10:15:00 on the last Thursday of every month
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0 15 10 ? * 5#3 Task is triggered on the Thursday of the third week of every month at 10:15:00
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```
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