Cloud Intermediate
Azure Service Bus — Enterprise Messaging¶
AzureService BusMessagingQueues 5 min read
Service Bus queues, topics, sessions, dead-letter queue and transactions.
Queue vs Topic¶
- Queue — point-to-point, FIFO with sessions
- Topic + Subscriptions — pub/sub, SQL-like filters
Sessions — FIFO¶
Messages with the same SessionId are processed sequentially — guaranteed ordering.
Dead-Letter Queue¶
- Max delivery count exceeded
- TTL expired
- Filter evaluation exception
DLQ = error inbox for async processing. Monitor it!
Summary¶
Service Bus = enterprise messaging. Sessions for FIFO, transactions for atomicity.
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