Event generation patterns in event-driven architecture involve techniques and strategies for generating events that represent significant occurrences or changes within a system. These patterns define how events are identified, captured, and produced based on specific triggers or conditions.

There are three general styles of event processing: simple, stream, and complex. The three styles are often used together in a mature event-driven architecture.

An EDA pattern designates how event producers, routers, and consumers work together. There are two common patterns in EDA architecture: publisher/subscriber and event streaming. The following sections expand on both these designs.