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Managing and Customizing OpenCms 6 by Matt Butcher

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Appendix A. Cron Expressions

This appendix covers the string format for setting job schedules using the Scheduled Jobs Management screen in the administration view, and how to work with cron expressions using the revised format for OpenCms 6.

What are Cron Expressions?

OpenCms can run specific tasks at specific times, eliminating the need for a human operator to manually run tasks on a regular basis. As we saw in Chapter 4, the Scheduled Jobs Management screen in the administration view provides an interface for creating, modifying, and removing scheduled jobs.

One of the most confusing aspects using of this tool is setting the Cron expression field in the New Job screen to execute at the desired time.

A cron expression is a string of characters, ...

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