Menu
Is it possible to get list of all packages, registered with @ComponentScan? I need to know, what (root?) packages have been registered in my Spring Boot application...
409
With Spring, we use the @ComponentScan annotation along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.
@Component and @ComponentScan are for different purposes. @Component indicates that a class might be a candidate for creating a bean. It's like putting a hand up. @ComponentScan is searching packages for Components.
@ComponentScan tells Spring in which packages you have annotated classes which should be managed by Spring. Spring needs to know which packages contain spring beans, otherwise you would have to register each bean individually in(xml file). This is the use of @ComponentScan.
To add many packages to Component Scan, you should pass the String[] array to the @ComponentScan annotation.
Possible solution - Scanning Java annotations at runtime
Use org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider
API
A component provider that scans the classpath from a base package. It then applies exclude and include filters to the resulting classes to find candidates.
ClassPathScanningCandidateComponentProvider scanner =
new ClassPathScanningCandidateComponentProvider(<DO_YOU_WANT_TO_USE_DEFAULT_FILTER>);
scanner.addIncludeFilter(new AnnotationTypeFilter(<TYPE_YOUR_ANNOTATION_HERE>.class));
for (BeanDefinition bd : scanner.findCandidateComponents(<TYPE_YOUR_BASE_PACKAGE_HERE>))
System.out.println(bd.getBeanClassName());
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With