Additionally, we don’t need the GraphqlController class - a /graphql endpoint will be added automatically.

Let’s start by adding the dependencies for SPQR and Spring Boot to our POM:ġ 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 public class BookResolver Īs we can see, we basically moved the code from the BookResolver to the BookService. We’re going to use Spring Boot GraphQL Starter and GraphQL SPQR. To see SPQR in action, we’ll set up a simple service. Introducing GraphQL SPQR with Spring Boot GraphQL Schema Publisher & Query Resolver, SPQR in short, originated in order to reduce the above problems - it simply generates GraphQL schemas from the annotated Java classes. Such an approach is error-prone and requires more effort in maintaining the project. This means that we’d be maintaining the same information in two places: in the schema files and in the Java classes. Secondly, we’d need to write respective Java POJOs representing each type from the schema. First, we’d have to add GraphQL schema files to the project. In the traditional approach, if we wanted to add GraphQL to our project, we would have to follow two steps.

At its core are schemas - files in which we define custom types and functions. GraphQL is a well-known query language created by Facebook. In this tutorial, we’ll learn the basics of GraphQL SPQR and see it in action in a simple Spring Boot project. One of the libraries that originated to make working with GraphQL more seamless is SPQR. GraphQL is a query and manipulation language for web APIs.

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