@Value("${someProperty}") should work without having to specify a PropertySourcesPlaceholderConfigurer bean. [SPR-11773]

[spring-projects-issues]

Adam Berlin opened SPR-11773 and commented

This came up while discussing the injection of YAML configuration using @Value in Spring Boot. (spring-projects/spring-boot#821) The configuration file is loaded by spring-boot, but it is not accessible to @Value until:

@Bean
public PropertySourcesPlaceholderConfigurer configurer() {
    return new PropertySourcesPlaceholderConfigurer();
}

This seems like unnecessary busy-work when setting up my application. Who knows what a PropertySourcesPlaceholderConfigurer is? That should be something the framework sets up for me automatically.

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Issue Links:

• @Enable-style annotation is desired for automatic registration of PropertySourcesPlaceholderConfigurer [SPR-9904] #14537 @Enable-style annotation is desired for automatic registration of PropertySourcesPlaceholderConfigurer

2 votes, 4 watchers

[spring-projects-issues]

Juergen Hoeller commented

This is related to #14537 in the sense of nicer enabling of property placeholder substitution. #14537 suggest a dedicated @EnableX annotation for that purpose, along the lines of our existing context:property-placeholder element, which is probably a good compromise for your purposes as well. At the very least, it doesn't require knowledge of the PropertySourcesPlaceholderConfigurer class name; instead, it can be found through auto-completion of @Enable*.

Simply enabling a PropertySourcesPlaceholderConfigurer by default would unfortunately make it hard to set up custom resolution strategies since those have to remove/override the default placeholder configurer in some way. This is not a single strategy but rather an interacting chain of post-processors, so it's hard to replace default processors there.

Juergen

[spring-projects-issues]

Adam Berlin commented

Is this maybe something that Spring Boot should take an opinion on, and it should create the @Bean automatically?

[spring-projects-issues]

Stéphane Nicoll commented

Adam, that's a question to ask on the boot tracker. I can't move that issue there unfortunately.

[spring-projects-issues]

Bulk closing outdated, unresolved issues. Please, reopen if still relevant.