java-spring-boot-graphql

This project serves as an example of how to implement a GraphQL API using Java Spring Boot. GraphQL is a query language for your API and a server-side runtime for executing queries by using a type system you define for your data. Unlike traditional REST APIs, GraphQL allows clients to request only the specific data they need, reducing over-fetching and under-fetching of data.

Goals of GraphQL

The goals of using GraphQL in this project are:

• Efficient Data Fetching: GraphQL enables clients to request only the specific data they need, preventing over-fetching of data common in REST APIs.

• Flexible Data Composition: Clients can define complex queries and receive all the required data in a single request.

• API Documentation: The GraphQL schema serves as self-documenting documentation for the API, making it easier for clients to understand the available operations and types.

• Versioning Control: GraphQL reduces the need for versioning by allowing the addition of new fields without affecting existing queries.

• Optimized Mobile and Web Apps: GraphQL provides efficient data transfer for mobile and web applications, reducing data transfer and optimizing app performance.

Requirements

Docker

Technologies

Java 17 (openjdk), Maven, Spring Boot, GraphQL

sh folder

The sh folder allows you to quickly launch docker commands to perform tasks

Build project

On the root folder

sh sh/build

Run the project

sh sh/deploy

The service is deployed at http://localhost:8085/graphql

Graphiql

GraphiQL is an in-browser IDE that provides a powerful and interactive interface for exploring and testing GraphQL APIs. It allows you to compose and execute GraphQL queries, view documentation, and see real-time responses. He is deployed at http://localhost:8085/graphiql

Query

Get all books :

{
  getAllBooks {
    id
    title
    author {
      id
      name
    }
  }
}

Get Book By ID:

{
  getBookById(id: "1") {
    id
    title
    author {
      id
      name
    }
  }
}

Create Book:

mutation {
  createBook(title: "New Book Title", authorId: 1) {
    id
    title
    author {
      id
      name
    }
  }
}

Update Book:

mutation {
  updateBook(id: 1, title: "Updated Book Title") {
    id
    title
    author {
      id
      name
    }
  }
}

Delete Book:

mutation {
  deleteBook(id: 1)
}