An event bus receives events from event sources.
EventBridge supports the following types of event buses:
- Default event bus: a built-in event bus that cannot be modified. This type of event bus is used to receive events from your Alibaba Cloud services. Events of Alibaba Cloud services can be published only to the default event bus.
- Custom event bus: an event bus that you create and manage. This type of event bus is used to receive events from custom applications or existing message data. Events of custom applications or existing message data can be published only to a custom event bus.