| Name | Description | Type | Package | Framework |
| HippoEventBus | Generic Hippo event bus. | Interface | org.onehippo.cms7.services.eventbus | Hippo |
| HippoEventListener | Developers can implement this HippoEventListener interface and implement onEvent(HippoEvent) to get a callback whenever a HippoEvent is posted to the HippoEventBus by HippoEventBus. | Interface | org.onehippo.cms7.services.eventbus | Hippo |
| Subscribe | Annotation for single-argument (void) methods that indicates that the method is a listener. | Class | org.onehippo.cms7.services.eventbus | Hippo |