What is the main task of a message broker system?

The main purpose of a message broker system is to ensure reliable and asynchronous message delivery between different components or services of an application.

A message broker receives messages from senders (producers), stores them, and delivers them to recipients (consumers), providing:

• Buffering of messages to smooth load
• Guarantee of delivery (e.g., at least once or exactly once)
• Routing of messages based on subscriptions or queues
• Scalability and integration of heterogeneous systems

Examples of message brokers include RabbitMQ, Kafka, and ActiveMQ.