Proxies in Java — without the magic.

Service proxy = DynamicProxyBuilder
    .createBuilder(Service.class, new ServiceImpl())
    .addIPreAction((original, method, args) -> {
      // executed before every invocation
    })
    .addSecurityRule(() -> currentUserCanCallService())
    .addMetrics()
    .build();

@StaticLoggingProxy
public interface Service {
  String work(String input);
}

// Generated at compile time — zero reflection at runtime
ServiceStaticLoggingProxy proxy =
    new ServiceStaticLoggingProxy()
        .withDelegator(new ServiceImpl());