Event-Driven Architecture

Learn about event-driven architecture and its pros and cons.


Event-driven architecture (EDA) is a software design paradigm in which the flow of the program is determined by externally produced events or messages. In an event-driven system, components communicate by sending and receiving events rather than calling each other’s functions or methods directly.


Here are some key characteristics of event-driven architecture:

  • Decoupling: Event-driven architecture promotes loose coupling between components because they don’t need to know about each other’s internal implementation details. This makes the system more flexible and easier to modify and maintain.

  • Asynchrony: Event-driven systems are typically asynchronous, meaning that events can be triggered at any time and might not be processed immediately. This allows the system to scale more easily and handle high volumes of events.

  • Scalability: Because event-driven systems are decoupled and asynchronous, they can be scaled horizontally by adding more nodes to the system. This makes them well-suited to handle large volumes of events and process them in real time.

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