“The front-end also tracks information related to all the requests, therefore, it also prevents identical requests from being put in a queue” where would these identical requests come from?
Course: Grokking Modern System Design Interview for Engineers & Managers - Learn Interactively
Lesson: Design of a Distributed Messaging Queue: Part 1
Hi Hedyeh
Identical requests in the context of front-end tracking and preventing duplication could arise from user interactions or system processes that generate repetitive requests. For instance, in a web application, a user clicking the same button multiple times might trigger identical requests. Additionally, certain automated processes or background tasks could unintentionally send the same request repeatedly. To identify identical requests, the front-end typically utilizes unique identifiers or tokens associated with each request. This can include parameters such as timestamps, user authentication tokens, or specific data related to the request content. By comparing these identifiers, the front-end can discern whether a new request is identical to a previous one. By comparing these identifiers, the front-end can recognize whether a new request is identical to a previous one and, consequently, avoid unnecessary duplication in the processing queue.
Thank you