GraphQL
Course Code: GRAPHQL
Duration: 2 days
GraphQL Course Overview
GraphQL is a query language for APIs and a query runtime engine. It's an increasingly popular alternative to REST given it enables the client to specify the shape of the representation and it minimises the number of requests required to obtain the desired data.
This course comprises sessions dealing with prerequisite topics including HTTP and REST APIs, core GraphQL theory, the building of GraphQL services and clients, queries, types, and yet more GraphQL theory including introspection and best practices.
Exercises and examples are used throughout the course to give practical hands-on experience with the techniques covered.
Delegates have the option of coding in either Java, Python, or JavaScript.
Course Objectives
This course aims to provide the delegate with the skills and knowledge necessary to design and build good quality GraphQL services.
Who will the Course Benefit?
This course will benefit developers who are required to build or maintain GraphQL services and/or clients, and anyone otherwise interested in what a GraphQL service is, how it works, and how to build a good one.
Skills Gained
The delegate will learn and acquire skills as follows:
- Define the terms API, web service, HTTP, JSON, and serialisation, and REST API
- Describe how a GraphQL service works
- Build a simple GraphQL service using Spring Boot (Java), Ariadne (Python), or Apollo (JS)
- Build a GraphQL client using HttpClient (Java), GQL (Python), or Apollo (JS)
- Write GraphQL queries exploiting features including arguments, variables, directives, etc.
- Devise GraphQL types exploiting features including lists, scalar & object types, interfaces, etc.
GraphQL Training Course
Course Introduction
- Administration and Course Materials
- Course Structure and Agenda
- Delegate and Trainer Introductions
Session 1: PREREQUISITES
- APIs
- Web apps
- Web services
- HTTP
- JSON
- Serialisation
- REST APIs
Session 2: GRAPHQL THEORY
- The problem with REST APIs
- What is GraphQL?
- The composition of a GraphQL service
- Queries and mutations
- Schemas and types
Session 3: GRAPHQL SERVICES
- Building a GraphQL service with:
- Spring Boot (Java) or;
- Ariadne (Python) or;
- Apollo (JavaScript)
Session 4: GRAPHQL CLIENTS
- Building a GraphQL client with:
- HttpClient (Java) or;
- GQL (Python) or;
- Apollo (JavaScript)
GraphQL Training Course
Session 5: QUERIES
- Arguments
- Aliases
- Fragments
- Operation names
- Variables
- Directives
Session 6: TYPES
- Arguments
- Lists
- Non-null fields
- The query and mutation types
- Scalar types
- Enum types
- Union types
- Input types
- Interfaces
Session 7: MORE GRAPHQL THEORY
- Validation
- Execution
- Introspection
- Best practices
- Course technical content is subject to change without notice.
- Course content is structured as sessions, this does not strictly map to course timings. Concepts, content and practicals often span sessions.
Requirements
Delegates attending this course should have some knowledge of, or experience in, software development. Ideally delegates will be comfortable coding in Java, Python, or JavaScript to a fundamental level.
Pre-Requisite Courses
Further Learning
Live Virtual Classroom
All the convenience and benefits of the classroom experience without the hassle and costs of travel and accommodation.
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