Spel not supported on spring annotation @Scheduled.fixedDelayString [SPR-14137]

[spring-projects-issues]

Sidi Amine Bouhamidi opened SPR-14137 and commented

I want to configure the fixedDelay in seconds in my properties file, then I want to convert it to millis in @Scheduled Annotation.

I expected this to work :

@Scheduled(fixedDelayString = "#{${my.scheduler.fixed.delay} * 1000}")

but it throw this exception

Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'myMethod': Invalid fixedDelayString value "#{5 * 1000}" - cannot parse into integer
 at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.processScheduled(ScheduledAnnotationBeanPostProcessor.java:384) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor$1.doWith(ScheduledAnnotationBeanPostProcessor.java:227) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]

${my.scheduler.fixed.delay} was correctly resloved but the expression was not resloved.

I tried to configure my own StringValueResolver

    private static class CustomValueResolver
        implements StringValueResolver {

        private final ConfigurableBeanFactory beanFactory;

        private final ExpressionParser expressionParser;

        public CustomValueResolver(final ConfigurableBeanFactory beanFactory, final ExpressionParser expressionParser) {

            this.beanFactory = beanFactory;
            this.expressionParser = expressionParser;
        }

        @Override
        public String resolveStringValue(
            final String strVal) {

            String value = this.beanFactory.resolveEmbeddedValue(strVal);
            if (value.startsWith("#{")) {
                value = this.expressionParser.parseExpression(value).getValue(String.class);
            }
            return value;
        }
    }

But I don't find the way to inject my custom CustomValueResolver.

Am I on the right or wrong way? is there another simple way

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Issue Links:

• Support SpEL next to placeholders in annotation attributes (e.g. @Scheduled) [SPR-13625] #18203 Support SpEL next to placeholders in annotation attributes (e.g. @Scheduled) ("duplicates")