Can @PropertySources be chosen by Spring profile?

Question

I have a Spring 3.1 @Configuration that needs a property foo to build a bean. The property is defined in defaults.properties but may be overridden by the property in overrides.properties if the application has an active override Spring profile.

Without the override, the code would look like this, and work...

@Configuration @PropertySource("classpath:defaults.properties") public class MyConfiguration {      @Autowired     private Environment environment;      @Bean     public Bean bean() {         ...         // this.environment.getRequiredProperty("foo");         ...     } } 

I would like a @PropertySource for classpath:overrides.properties contingent on @Profile("overrides"). Does anyone have any ideas on how this could be achieved? Some options I've considered are a duplicate @Configuration, but that would violate DRY, or programmatic manipulation of the ConfigurableEnvironment, but I'm not sure where the environment.getPropertySources.addFirst() call would go.

Placing the following in an XML configuration works if I inject the property directly with @Value, but not when I use Environment and the getRequiredProperty() method.

<context:property-placeholder ignore-unresolvable="true" location="classpath:defaults.properties"/>  <beans profile="overrides">     <context:property-placeholder ignore-unresolvable="true" order="0"                                   location="classpath:overrides.properties"/> </beans> 

Update

If you're trying to do this now, check out Spring Boot's YAML support, particularly the 'Using YAML instead of Properties' section. The profile support there would make this question moot, but there isn't @PropertySource support yet.

Answer 1

Add the overriding @PropertySource in a static inner class. Unfortunately, you must specify all property sources together which means creating a "default" profile as the alternative to "override".

@Configuration public class MyConfiguration {     @Configuration     @Profile("default")     @PropertySource("classpath:defaults.properties")     static class Defaults     { }      @Configuration     @Profile("override")     @PropertySource({"classpath:defaults.properties", "classpath:overrides.properties"})     static class Overrides     {         // nothing needed here if you are only overriding property values     }      @Autowired     private Environment environment;      @Bean     public Bean bean() {         ...         // this.environment.getRequiredProperty("foo");         ...     } }