I am trying to read cron expression from the property file for @Scheduled annotation.
However, when I start the server, I get error like below
Encountered invalid @Scheduled method 'scheduleServicePrincipalOrchestorJob': For input string: "'0
Not Sure what is happening here.
My annotation looks like -
@Scheduled(cron= "${abc.cronExpression}", zone="America/Los_Angeles")
My application.properties looks like
abc.cronExpression="0 8 0 0 0 0"
Any leads on what is going wrong?
Remove the quotes from the cron expression. Also some of the fields cannot be 0, so start with a valid expression like this and adjust to your needs:
abc.cronExpression=0 0/5 * * * ?
That is, at second 0, every 5 minutes, every day.
A cron expression in Spring using @Scheduled is consists of the following parts:
<second> <minute> <hour> <day-of-month> <month> <day-of-week> <year>
Where the last part <year> is optional.
In your example, you use both 0 for <day-of-month> and <month> which is not possible as they are not starting from 0 but 1.
Your cron works with the following two adjustments:
bc.cronExpression=0 8 0 * * 0
Where * means any day in the month for any month.
Or you can use the following to execute your code only at the first day of the first month:
bc.cronExpression=0 8 0 1 1 0
For more information, Bealdung put together a great guide to cron expressions that may help you understand it further.
Maybe you can refer to this.
The value for annotation attribute Scheduled.cron must be a constant expression
