How does the message broker mechanism work and what role does it play in the data exchange system?

The message broker mechanism is an intermediary that receives, stores, and forwards messages between different components of the system. It provides asynchronous data exchange, allowing the sender and receiver to operate independently of each other's timing.

Role of the message broker:

• Decoupling components: the sender does not know who will receive the message, and vice versa.
• Reliability: the broker can store messages until the receiver is ready to process them.
• Scalability: it allows load distribution and parallel message processing.
• Routing flexibility: supports different exchange models (queues, topics).

Example: in a system with microservices, service A sends a task to the broker's queue, service B reads this queue and processes the task, and they do not depend on each other's timing.