Microservices Patterns (Event Sourcing & CQRS)

Microservices Patterns, such as Event Sourcing and Command Query Responsibility Segregation (CQRS), are architectural patterns that address the complexities of building scalable and maintainable distributed systems. 

Event Sourcing ensures that all changes to the application state are stored as a sequence of events, not just the current state, which allows for robust auditing, easy debugging, and the ability to rebuild system state from these events. 

CQRS, on the other hand, separates the read and update operations for a database. This enables systems to scale read and write operations independently. CQRS is one of the important pattern when querying between microservices. We can use the CQRS design pattern to avoid complex queries and to get rid of inefficient joins. 

Together, these patterns provide a strategic approach to designing microservices by ensuring that they are loosely coupled, scalable, and resilient to changes, which is essential for modern application development in complex and demanding environments. 

This course is taught in Romanian, with course materials available in either English, or Romanian. The course can be personalized - on request.