How to retrieve all Data Repository methods in Spring Boot

Question

I have a Spring Boot application and I want to list all Data Repositories and also all the methods for each repository. How could I achieve this?

Answer 1

Here is one way of doing so that leverages spring-data-commons

Repositories repositories = new Repositories(context.getBeanFactory());
Iterator it = repositories.iterator();
 while(it.hasNext()) {
  Class<?> domainClass = (Class<?>) it.next();
  //Get Repositories
  repositories.getRepositoryFor(domainClass);
  //Get Query Methods
  List<QueryMethod> methods = repositories.getQueryMethodsFor(domainClass);
 }

Note: The above code only fetches the automatically implemented Spring Data Query methods. If you need all Query methods including those from the provided interfaces (e.g. CrudRepository) as well as custom Query method implementations then use the following:

Repositories repositories = new Repositories(context.getBeanFactory());
Iterator it = repositories.iterator();
while(it.hasNext()) {
    Class<?> domainClass = (Class<?>) it.next();
    Advised repoProxy = (Advised)repositories.getRepositoryFor(domainClass);
    Class<?>[] interfaces = repoProxy.getProxiedInterfaces();
    List<Method> methods = Arrays.stream(interfaces)
                    .flatMap(c -> Arrays.stream(ReflectionUtils.getAllDeclaredMethods(c)))
                    .collect(toList());
}