CODEWITHSUNDEEP
javaspringspring-boot
mabn
mabn

Reputation: 2523

auto-configuration adding PropertySource in spring-boot

I want to add a custom PropertySource (the class, not annotation). Annotation is not sufficient as it only handles file sources.

The approach which works is to define own ApplicationContextInitializer and add proper declaration to META-INF/spring.factories. ApplicationContextInitializer just uses: Environment.getPropertySources().addLast(...) But there are some drawbacks, mainly:

How to achieve that? Ideally I'd write my autoconfiguration with @Condition... annotations and inside declare such initializer (preferably Ordered).

Edit: In my particular case I want to define Archaius PolledConfigurationSource, but only if Archaius is on the classpath - that's why I'd like to use @ConditionalOnClass together with a listener on an event very early in the lifecycle.

Upvotes: 1

Views: 1524

Answers (1)

p3consulting
p3consulting

Reputation: 4567

You could have an intermediary class - part of your application, let's call it the "ProviderConfigurer" - of which goal will be to load a Service (packaged in a separate jar with META-INF/services/targetSPi) that in turn will load Archaius. So to activate Archaius you will have to place 2 jars instead of one, but then the ProviderConfigurer will be able to load the property source provided by the Service (the API will be part of the interface you will have to define...) if any is discovered in the class path and do nothing in case the Service doesn't find any class implementing the SPI you will define for the purpose.

Upvotes: 1

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