Pubsubjärjestelmäs

Pubsubjärjestelmä, often referred to as a publish-subscribe system, is a messaging pattern used in software architecture. It decouples senders of messages (publishers) from receivers of messages (subscribers). Instead of directly communicating with each other, publishers send messages to a central broker or bus. Subscribers express interest in specific types of messages by subscribing to "topics" or "channels" managed by the broker. When a publisher sends a message to a topic, the broker forwards that message to all subscribers who have registered for that particular topic. This asynchronous communication model allows for great flexibility and scalability. Publishers don't need to know who the subscribers are, and subscribers don't need to know who the publishers are. This separation of concerns makes it easier to add or remove publishers and subscribers without affecting the other components of the system. Pubsubjärjestelmäs are commonly used in microservices architectures, real-time data processing, and event-driven applications. Examples of such systems include Kafka, RabbitMQ, and Google Cloud Pub/Sub.