I have following annotation in my code
@Scheduled(fixedDelayString = "${app.delay}")
At this case I have to have properties like this
app.delay=10000 #10 sec
Propery file looks unreadable because I have calculate value to miliseconds.
Is there way to pass value like 5m or 30s there ?
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Answer
As far as I know, you can’t do it directly. However, Spring boot configuration properties do support automatic conversion of parameters like 15s
and 5m
to Duration
.
This means you could create a @ConfigurationProperties
class like this:
@Component @ConfigurationProperties("app") public class AppProperties { private Duration delay; // Setter + Getter }
Additionally, since you can use bean references with Spring’s Expression Language within the @Scheduled
annotation, you can do something like this:
@Scheduled(fixedDelayString = "#{@appProperties.getDelay().toMillis()}") public void schedule() { log.info("Scheduled"); }
Note: When using this approach, you have to register your configuration properties using the @Component
annotation. It won’t work if you use the @EnableConfigurationProperties
annotation.
Alternatively, you can programmatically add a task to the TaskScheduler
. The benefit of that is that you have more compile-time safety, and it allows you to work with Duration
directly:
@Bean public ScheduledFuture<?> schedule(TaskScheduler scheduler, AppProperties properties) { return scheduler.scheduleWithFixedDelay(() -> log.info("Scheduled"), properties.getDelay()); }