To deliver a large complex application rapidly, frequently and reliably, you often must use the microservice architecture. The microservice architecture is an architectural style that structures the application as a collection of loosely coupled services.

One challenge with using microservices is that in order to be loosely coupled each service has its own private database. As a result, implementing transactions and queries that span services is no longer straightforward.

In this EDA Summit presentation, you will learn how event-driven microservices address this challenge. Chris Richardson, creator of, describes how to use sagas, which is an asynchronous messaging-based pattern, to implement transactions that span services.

You will learn how to implement queries that span services using the CQRS pattern, which maintain easily queryable replicas using events.


Chris Richardson

Chris Richardson

Creator of