What is Message Queue? — UK Software Development Guide
Direct Answer
A message queue is a form of asynchronous communication that allows software components to exchange messages without needing to be running simultaneously or directly connected. Producers send messages to the queue; consumers read and process messages at their own pace. Common message queue systems: Apache Kafka, RabbitMQ, AWS SQS/SNS, and Azure Service Bus.
Message-queue in the UK
Message queues are critical for UK regulated software: in FinTech, Kafka is used for real-time transaction processing and audit logging (FCA audit trail requirements); in HealthTech, queues enable reliable asynchronous NHS API calls (the NHS Spine has rate limits — queuing smooths burst traffic); in eCommerce, SQS decouples order processing from checkout (Black Friday resilience). UK GDPR: message payloads containing personal data must be encrypted in transit and at rest, and message retention must comply with data minimisation principles.
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