Messaging và ranh giới bảo đảm xử lý

Nội dung luyện tập

• identify consumer ack scope
• distinguish publisher confirm from business result
• choose independent subscription queues
• separate queue and message durability
• place ack after durable processing
• interpret redelivery hint
• interpret consumer prefetch bound
• detect unroutable publishes
• configure dead letter destination
• avoid unbounded hot requeue
• close local state event dual write gap
• recover publish with unknown confirm
• separate enqueue order from effect order
• redrive poison message safely
• recognize ttl is not precise scheduler
• atomically deduplicate local side effect
• bound exactly once claims across systems
• migrate queue topology without data loss
• understand majority availability boundary
• measure business completion beyond queue depth

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