How do you implement message handling and error processing in Azure Service Bus?

Azure Service Bus message handling is typically implemented with a receiver or processor that reads messages, processes them, and explicitly completes, abandons, defers, or dead-letters each message based on the outcome. Error processing is handled through retry policies, exception handling, and dead-letter queues (DLQs) to isolate messages that cannot be successfully processed. The implementation should be designed for at-least-once delivery, meaning handlers must be idempotent.

Azure Service Bus provides reliable asynchronous messaging through queues and topics. A message consumer is responsible for receiving messages, executing business logic, and communicating the processing result back to Service Bus.

The common message processing lifecycle is:

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