The microservice architecture functionally decomposes an application into a set of services. Each service has its own private database that’s only accessible indirectly through the services API. Consequently, implementing queries and transactions that span multiple services is challenging.

In this tutorial, you will learn how to solve these distributed data management challenges. I will share with you how to implement transactions using sagas, which are sequences of local transactions. You will learn how to coordinate sagas using either events or command messages. I will also explore how to implement queries using the API Composition and Command Query Responsibility Segregation (CQRS) patterns.