Cloud Native Programming with Golang

Persistence layer

The first decision that needs to be made when designing a persistence layer is to decide on the type of the data store. The data store could be a relational SQL database such as Microsoft SQL or MySQL, among others. Alternatively, it can be a NoSQL store, such as MongoDB, or Apache Cassandra, among others.

In an efficient and complex production environment, the code needs to be capable of switching from one data store to another without too much refactoring. Consider the following example—you build a number of microservices for a start-up that relies on MongoDB as the data store; then, as the organization changes, you decide that AWS cloud-based DynamoDB would make a better data store for the microservices. If the code doesn't ...