![]() These two receiving methods are a setting on the topic or queue named, “ReceiveMode”. Topics and queues provide two ways for consumers to receive messages. For more information head on over to this Microsoft Docs article to learn about implementing topics into a solution. Each subscription is a uniquely named virtual queue that receives the broadcasted messages from the topic it is registered to (see diagram). Think of a topic as a top-level queue with multiple subscriptions that live within that queue. Users subscribe to each topic by using a subscription. Topics are like queues except they allow for a publish-subscribe model: instead of only one consumer per message, many consumers can subscribe to the same topic and receive their own copy of each message. ![]() Creating and using queues in ASB is incredibly simple. The producer produces messages and puts them into the queue, while the consumer periodically polls for messages and consumes them. ASB queues always have two users involved-a producer and a consumer. The first being nothing more than a FIFO queue and the second is much like a queue but it’s called a topic. Topics & Queues: A Quick PrimerĪSB has two core pieces of functionality. I learned quite a few valuable lessons about error handling and best practices along the way. On a recent client engagement, I was tasked with implementing an integration to ASB. ASB allows for scalable cloud based applications to be built on a fast-reliable messaging infrastructure. Microsoft Azure Service Bus (ASB) is Microsoft’s premier enterprise level messaging technology that uses this principle of FIFO. ![]() Just like someone waiting in line to order food, the first one in line gets to order first. As the queue grows the last item added to the queue typically must wait longer to be processed. It’s as simple as it sounds, first in first out or, FIFO for short. Queues are a very common piece of infrastructure and vital in technology to enable scalability and high throughput activity without blocking other activities.
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