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How to obtain a list of applied Spring Boot (auto or not) configurations?
513
You need to opt-in to auto-configuration by adding the @EnableAutoConfiguration or @SpringBootApplication annotations to one of your @Configuration classes. You should only ever add one @EnableAutoConfiguration annotation. We generally recommend that you add it to your primary @Configuration class.
Spring Boot lets you externalize your configuration so that you can work with the same application code in different environments. You can use properties files, YAML files, environment variables, and command-line arguments to externalize configuration.
AutoConfiguration classes are run last (meaning after all regular non-autoconfiguration classes) while the order in which Configuration classes are run is indeterminate (except if we use ordering annotations like @Ordered ) To declare a class as an AutoConfiguration they need to be specified as such in the spring.
After you get your artifact built, you can get an auto-configuration report if you start it including the --debug command parameter:
java -jar artifact.jar --debug
or directly adding it as a parameter for SpringApplication.run()
SpringApplication.run(WebApp.class, "--debug");
or inside the IDE, by adding --debug as an argument in your launch configuration.
The report will look like this:
=========================
AUTO-CONFIGURATION REPORT
=========================
Positive matches:
-----------------
AopAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.context.annotation.EnableAspectJAutoProxy,org.aspectj.lang.annotation.Aspect,org.aspectj.lang.reflect.Advice (OnClassCondition)
- matched (OnPropertyCondition)
AopAutoConfiguration.JdkDynamicAutoProxyConfiguration
- matched (OnPropertyCondition)
AuditAutoConfiguration#authenticationAuditListener
- @ConditionalOnClass classes found: org.springframework.security.authentication.event.AbstractAuthenticationEvent (OnClassCondition)
AuditAutoConfiguration#authorizationAuditListener
- @ConditionalOnClass classes found: org.springframework.security.access.event.AbstractAuthorizationEvent (OnClassCondition)
AuditAutoConfiguration.AuditEventRepositoryConfiguration
- @ConditionalOnMissingBean (types: org.springframework.boot.actuate.audit.AuditEventRepository; SearchStrategy: all) found no beans (OnBeanCondition)
[...]
Negative matches:
-----------------
ActiveMQAutoConfiguration
- required @ConditionalOnClass classes not found: javax.jms.ConnectionFactory,org.apache.activemq.ActiveMQConnectionFactory (OnClassCondition)
AopAutoConfiguration.CglibAutoProxyConfiguration
- @ConditionalOnProperty missing required properties spring.aop.proxy-target-class (OnPropertyCondition)
AtomikosJtaConfiguration
- required @ConditionalOnClass classes not found: com.atomikos.icatch.jta.UserTransactionManager (OnClassCondition)
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