Cloud Asynchronous Message Repository for Payment Systems
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Solution Overview
Problem
Traditional synchronous communication systems in electronic payment infrastructure are inefficient due to resource busy-waiting and errors caused by out-of-sequence messages, limiting the flexibility and reliability of transactions between POS terminals, PIN pads, and other components.
Innovation Solution
Implementing cloud-based asynchronous communication using an electronic message repository that allows components to send and receive messages independently, with a state management system ensuring messages are processed in sync with transaction flows, and a mailbox system for message queuing and notification, reducing errors and resource idle times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synchronous communication is used between POS terminal and PIN pad, then message transmission is simple and direct, but system efficiency decreases due to resources busy-waiting for responses
Solution Approach 1:
The system performs preliminary actions by sending messages to the electronic message repository in advance, allowing the sender to continue processing without waiting for responses. The message repository pre-processes and queues messages, enabling asynchronous communication where resources are not blocked waiting for replies.
2Reliability
If synchronous communication is used, then message transmission is straightforward, but errors occur when out of sequence messages arrive due to limited request/response pairing
Solution Approach 1:
The electronic message repository acts as an intermediary between the POS terminal and PIN pad, receiving, storing, and managing messages asynchronously. This mediator decouples the direct request/response relationship, allowing messages to be processed in any sequence without causing errors, as the repository maintains proper message-state associations.
3Reliability
If asynchronous communication with state management is implemented, then message processing reliability improves, but system complexity increases due to state tracking requirements
Solution Approach 1:
The system implements feedback mechanisms where the electronic message repository continuously monitors message states and updates them based on processing outcomes. The state management system receives feedback about message processing status and adjusts accordingly, ensuring reliable asynchronous communication while systematically managing complexity through structured state tracking.
Data Source
AI summary
A method for cloud-based asynchronous communication includes receiving a transaction request message from a cloud-based application, sending the received transaction request message to a PIN pad by way of an electronic message repository, updating a current state according to the received transaction request, listening for a new incoming message event from the electronic message repository, receiving a new incoming message event from the electronic message repository, and retrieving an incoming message from the electronic message repository, determining whether the retrieved incoming message matches the current state, upon determining that the retrieved incoming message matches the current state, transmitting the retrieved incoming message to the cloud-based application, and upon determining that the retrieved incoming message does not match the current state, retaining the retrieved incoming message in the electronic message repository.