Understanding events

EventCatalog supports different message types, this includes commands, events (and soon queries).

Events represent facts and are immutable and are a type of message in EventCatalog.

Services may produce events to notify others that something has happened.

Example of an event

An example of an event would be OrderPlaced message.

• This event is a fact that an order has been placed.
• Other services (consumers) may be interested in this event and can typically subscribe to it.

Events in EventCatalog

• Events in EventCatalog can be consumed by services or published by services.
• Events in EventCatalog are orange (following EventStorming conventions)
• Events live in the /events folder.