A queue manager is a software component that manages the flow of messages between applications or processes. It acts as an intermediary between the sender and receiver, ensuring reliable and efficient message delivery. Queues are typically used in distributed systems, where multiple components need to communicate with each other asynchronously. The queue manager provides features such as message buffering, prioritization, and routing, allowing for complex communication patterns. With a queue manager, applications can communicate without being directly connected, improving scalability and fault tolerance. Popular queue managers include IBM MQ, RabbitMQ, and Apache ActiveMQ.
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