| Name | Type | Package | Detail |
| CommonsUploadMultipartObserver | Class | observer.upload | Detail |
| DeserializingObserver | Class | vraptor.observer | Detail |
| DownloadObserver | Class | observer.download | Detail |
| InstantiateObserver | Class | vraptor.observer | Detail |
| NullMultipartObserver | Class | observer.upload | Detail |
| RequestHandlerObserver | Class | vraptor.observer | Detail |
