Is there any way to call function automatically from spring boot, at given date time fetched from PostgreSQL DB table?

Chirag Shah :

Using spring boot, JPA, angular, PostgreSQL

Want to run the process automatically at particular date and time fetch from DB, and update status in DB accordingly

Purpose : We are giving 15 days free registration, let say user registered at 13th Dec., 13:05 then server should stop all the process of that user from 27th Dec., 13:05.

How can I call my function from spring boot automatically at 27th Dec., 13:05 (Available in PostgreSQL DB table)

I have tried scheduler with @Scheduled annotation also, but it runs after given interval of time.

Please suggest or hint any way to achieve this functionality.

flob :

I see three options:

• Configure Spring Scheduling.
• Use Polling.
• Build your own Scheduler (which I wouldn't).

Configure Spring Scheduling

You might implement a SchedulingConfigurer and use the provided ScheduledTaskRegistrar accordingly.

You should be able to add new cron tasks with addCronTask or probably refresh all with setCronTask.

I haven't tried it myself though ;-)

Use Polling

If that doesn't work you might fall back to polling with a select min(next_job_date) from jobs; to find the next job and start it when its ready.

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