CQRS — Command Query Responsibility Segregation — A Java, Spring, SpringBoot, and Axon Example

This post introduces Command Query Responsibility Segregation (CQRS) and explains its benefits in software architecture, including its ability to handle different loads for read and write operations, manage security concerns, and maintain data consistency. It provides a practical example using Java, Spring, SpringBoot, and Axon, demonstrating how to implement CQRS with separate databases for command and query operations. Key components like commands, queries, models, EventHandlers, and CommandBus are detailed, alongside dependencies and database configuration.