使用Spring 4 PropertySource时找不到可重复的内容

Question

we are using Spring 4.0.1.RELEASE in combination with jdk6 (this is fixed). Of course we have done the config in Java with usage of the @PropertySource annotation. This leads to an annoying warning message(s) when we compile the project with gradle:

org\\springframework\\context\\annotation\\PropertySource.class(org\\springframework\\context\\annotation:PropertySource.class): warning: Cannot find annotat ion method 'value()' in type 'java.lang.annotation.Repeatable': class file for java.lang.annotation.Repeatable not found

This is caused by the usage of not (in jdk6) existing Repeatable class and I am glad that it's just a warning. I love the clean output of gradle and this is just annoying because it may obfuscate other "real" warnings (like checkstyle...).

Maybe anyone faced the same problem and got a (not so much hack) solution for this situation. I just want to see a clean output again.

Answer 1

I think that the problem is that in Spring 4 , they use @Repeatable annotation, which has only been introduced in Java 8 .

Therefore, if you're not using Java 8 you'll continue to see this problem, at least until this issue will be fixed.

BTW , this is also preventing the usage of @Scheduled annotation in older JDKs than Java 8. I hope it will be fixed soon.

Answer 2

Just for the records: Use

@PropertySources(@PropertySource("classpath:path/to/config"))

to get rid of the exception.

Credits goes to: http://www.javacodegeeks.com/2013/11/how-to-using-propertysource-annotation-in-spring-4-with-java-7.html

Answer 3

I guess if you just want to get rid of the warning you might be able to achieve this with a custom logger: http://www.gradle.org/docs/current/userguide/logging.html

I'd check the current implementation, and wrap it in something that filters out the warning you want to ignore, forwarding everything else unchanged.

Answer 4

A workaround to get rid of the warning below Java 8 is to use the following approach instead of the @Scheduled annotation:

@PostConstruct
public void setupTaskScheduler() throws FileNotFoundException {
    taskScheduler = new ConcurrentTaskScheduler();

    taskScheduler.schedule(new Runnable(...), new CronTrigger("0 0 * * * *"));    
}