Dante — Tech Lead Skill AI

$# Decision Record: Adoption of a Message Queue for Order Pipeline ## Context Our current order processing pipeline handles incoming orders synchronously, which can lead to bottlenecks during peak loads, increased latency, and reduced system resilience. To improve scalability, reliability, and maintainability, we are considering adopting a message queue system. ## Decision We will adopt a message queue for our order pipeline to decouple order intake from processing, enabling asynchronous handling of orders. ## Rationale - **Scalability:** Message queues allow us to buffer incoming orders and process them at a rate our system can handle, smoothing out spikes in traffic. - **Reliability:** Decoupling components reduces the risk of system-wide failures; if one part is down, messages can be retained and processed later. - **Flexibility:** Enables easier integration of additional processing steps or services without impacting the order intake flow. - **Monitoring and Retry:** Most message queue systems provide built-in support for monitoring, retries, and dead-letter queues, improving error handling. - **Technology Maturity:** Message queue technologies like RabbitMQ, Kafka, and AWS SQS are mature and widely supported. ## Alternatives Considered - **Continue with synchronous processing:** Simpler but less scalable and resilient. - **Batch processing:** Adds latency and complexity. - **Direct database polling:** Less efficient and can cause contention. ## Consequences - **Increased complexity:** Introducing a message queue adds operational overhead and requires monitoring. - **Learning curve:** Team members need to become familiar with message queue concepts and tools. - **Infrastructure costs:** Potential additional costs for hosting and maintaining the message queue system. ## Implementation Notes - Evaluate and select a message queue technology that fits our scale and operational model. - Design idempotent order processing to handle potential message duplication. - Implement monitoring and alerting for the message queue system. - Plan a phased rollout to minimize disruption. --- This decision will be revisited after initial implementation and performance evaluation.