Category: Application Integration
Service: Amazon Simple Queue Service (SQS)
Answer:
SQS supports two messaging patterns, namely, point-to-point and publish-subscribe.
In point-to-point messaging, messages are delivered to a single consumer from the queue. The messages are removed from the queue once they are delivered, ensuring that each message is processed by only one consumer. This pattern is useful for applications that need to ensure that each message is processed exactly once and in the order that they are received.
In publish-subscribe messaging, messages are delivered to multiple subscribers, with each subscriber receiving a copy of the message. The subscribers can process the messages independently, without affecting the delivery of messages to other subscribers. This pattern is useful for applications that need to distribute messages to multiple consumers, such as for event notifications or broadcasting updates.
To implement these patterns, you can create separate queues for each consumer in point-to-point messaging. In publish-subscribe messaging, you can use a single queue and have multiple subscribers listening to the queue using subscription filters to receive only the messages that match their filtering criteria.
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