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Decouple backend processing from a frontend host, where backend processing needs to be asynchronous, but the frontend still needs a clear response : https://docs.microsoft.com/en-us/azure/architecture/patterns/async-request-reply |
Context and problem
Need a response quickly enough to arrive back over the same connection and avoid latency to the response and fake the appearance of asynchronous processing (recommended for I/O-bound operations).
But, the work done by backend may be long-running (seconds, minutes, or even hours). So, Queue-Based Load Leveling could he helpful.
Http response is the key in this kind of pattern : HTTP 202 (Accepted) status code, acknowledging that the request has been received for processing.Solution
Challenges