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Simple Queue Service - Coggle Diagram

- - - - acts as a buffer
        
        producer
        
        consumer
    - - exchange messages
        
        polling model
        
        decouple components
  - - - Transport Layer Security
    - - SSE as soon as message is recieve
- - - - receipt handle is returned
        
        different for each time
    - - delete
      - change
- - - - when visibile
        
        message can be duplicated
    - - the message is still available on the Queue, other consumers would be able to receive and process and this needs to be prevented
    - - if not delete before timeout expire, the message is visibile again
  - - - change with Queue Level
    - - changing recept handle
      - ChangeMessageVisibility
        
        SQS restarts the timeout period using the new value
      - applied only to that particular receipt
- - - - order of operations and events is critical
      - duplicates can’t be tolerated
  - - - at-least-once message delivery
      - nearly unlimited number of API calls
        
        per second
        
        per API action
        
        SendMessage
        
        ReceiveMessage
        
        DeleteMessage
    - - messages are generally delivered in the same order as they’re sent
- - - - multiple
        
        SendMessage
        
        DeleteMessage
        
        ChangeMessageVisibility
      - no changes to applications
    - - into a local buffer
      - immediatly process messages
        
        no waiting for the messages to be retrived
    - - reduce latency