Händelsebaserad

Händelsebaserad refers to a methodology or system design that is driven by events. An event can be defined as a significant change in state that a system recognizes. This could be anything from a user clicking a button, a sensor reading exceeding a threshold, or a message arriving from another system. In an event-based system, components communicate with each other by producing and consuming these events. Instead of one component directly calling another, it publishes an event. Other components that are interested in that particular event subscribe to it and react when it occurs. This decoupling of components is a key characteristic of event-based architectures.

This approach offers several advantages. It promotes modularity and flexibility, as components don't need to know about each other's internal workings, only about the events they produce or consume. This makes systems easier to scale, maintain, and extend. When a new functionality is needed, a new component can be added that simply subscribes to relevant existing events or publishes new ones without modifying existing ones. Event-based systems are well-suited for scenarios involving real-time processing, distributed systems, and asynchronous communication. Examples include financial trading platforms, IoT sensor networks, and microservices architectures. The core idea is that the system's behavior emerges from the reactions of various components to a stream of events.