EmailVerificationMqConfig

Info

Spring @Configuration that declares the RabbitMQ exchange, queues, and bindings for asynchronous email verification code dispatch.

Overview

Configures a durable DirectExchange with three queues: a main dispatch queue, a retry queue (with configurable TTL dead-lettering back to the main queue), and a dead-letter queue (DLQ) for permanently failed messages. Uses JacksonJsonMessageConverter for JSON serialization.

Constants

Constant	Value	Description
EMAIL_CODE_EXCHANGE	eisland.email.verify.exchange	Direct exchange name
EMAIL_CODE_QUEUE	eisland.email.verify.dispatch.queue	Main dispatch queue
EMAIL_CODE_ROUTING_KEY	eisland.email.verify.dispatch	Main queue routing key
EMAIL_CODE_RETRY_QUEUE	eisland.email.verify.retry.queue	Retry queue
EMAIL_CODE_RETRY_ROUTING_KEY	eisland.email.verify.retry	Retry routing key
EMAIL_CODE_DLQ	eisland.email.verify.dlq	Dead-letter queue
EMAIL_CODE_DLQ_ROUTING_KEY	eisland.email.verify.dlq	DLQ routing key
EMAIL_RETRY_HEADER	x-email-retry-count	Header tracking retry attempts

Retry Strategy

Parameter	Env / YAML Key	Default	Description
Retry Delay	email.notify-retry-delay-ms	10000	TTL (ms) on retry queue before dead-lettering back to main
Max Retries	email.notify-max-retries	3	Enforced by EmailCodeDispatchConsumer

Beans

• emailCodeExchange -- durable, non-auto-delete DirectExchange
• emailCodeQueue -- durable main dispatch queue
• emailCodeRetryQueue -- durable retry queue with TTL and DLX
• emailCodeDlqQueue -- durable dead-letter queue
• Three Binding beans wiring exchange to queues
• rabbitJsonMessageConverter -- JacksonJsonMessageConverter for JSON serialization
• rabbitTemplate -- RabbitTemplate configured with JSON converter
• rabbitAdmin -- RabbitAdmin for automatic queue/exchange declaration