Freaks City

Problem Analysis Consider a user registration promotional scenario where we introduce a message queue to decouple the main registration flow from promotional activities. The sequence diagram shows the account center completing user registration logic—writing to the account center database and sending a message to the MQ server before returning ...

Consider a typical microservice deployment where an order processing service runs across multiple instances. A common requirement is to daily scan for successfully processed orders from the previous day and notify downstream analytics services. A naive implemantation using Spring’s @Scheduled annotation leads to duplicate execution in productio ...