The Publish-Subscribe Broker architecture pattern is a messaging pattern in which multiple publishers can send messages to multiple subscribers through an intermediary broker. Publishers send messages to the broker, which then distributes the messages to all subscribed clients or subscribers. Subscribers can subscribe to specific topics or message types, and the broker ensures that only relevant messages are sent to the subscribers who have subscribed to those topics. This pattern allows for a decoupling between publishers and subscribers, as well as a flexibility to add or remove publishers and subscribers as needed. The broker also provides a buffering mechanism that ensures that messages are delivered even if subscribers are not currently active. This pattern is commonly used in distributed systems for event-driven architectures, real-time data processing, and messaging systems.
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