Code GraphQL Application : Java Spring Boot 3 & Netflix DGS (Udemy.com)

Latest Update

With more than 4 hours update of the latest and greatest tech updates, and a real-life project experience, you'll feel like you've been transported to a parallel universe where GraphQL rules all. You'll learn how to:

• Define GraphQL models like a boss

• Craft database schemas with the precision of a samurai

• Control multiple GraphQL services with the flick of a wrist

• Tame database migration with Flyway, like a wild stallion

• Build queries and mutations that would make Linus Torvalds nod in approval

• Tackle the N+1 problem like a superhero

• Use dynamic filtering, sorting, and pagination on GraphQL queries like a magician

• Trace and limit complexities with GraphQL instrumentation like a detective

• Validate inputs with custom validations for business rules like a judge

• Upload files like a pro

• Update existing data with mutations like a ninja

• Combine multiple GraphQL services like a superhero team

• Load data from other GraphQL and non-GraphQL services like a wizard

• Solve the GraphQL N+1 problem with data loaders like a detective

• Implement Apollo federation for combining multiple GraphQL services like a king

Don't miss out on the opportunity to level up your skills, impress your coworkers, and become the office GraphQL guru. Enroll now and get ready for the ride of a lifetime!

What Is Graph?

I am graph, I go to work on graph. It's everywhere, really. I have a sister. Both of us has same parents. Our mom has parents, which is our grandparents from mom's side. And so our dad, which means we have grandparents from dad's side. And together, this is he "myself" graph. Tweet something on twitter, and it's a graph. See: 8 people likes the tweet, and 3 people retweet my original tweet, so this is the graph.

What Is QL?

QL in GraphQL is shorthand for query language. If it seems familiar, you are right. SQL, or the structured query language, has the same shorthand. SQL used to read and manipulate data in database. During SQL read, we can select multiple columns as we need, from one table, or several connected tables, usually through foreign key. The same way with GraphQL. Like SQL, a single GraphQL query can return multiple columns from connected data. We can also use GraphQL to change or remove data.

So What is GraphQL?

GraphQL is a query language which uses graph concept. GraphQL is also a runtime that needs to be implemented on the backend, so the frontend application can use it as the query language. 

To implement graphql, we need runtime frameworks, which each programming language has their own implementation. GraphQL itself is a specification, means whatever the framework, it must comply to the graphql specification, so the user can use GraphQL without even need to know what the GraphQL backend language is.

GraphQL is a service, where we need two items for creating Graphql backend. First, is the schema, which represents GraphQL structure. It is like database tables and relationships. Second is the resolver, which is logic for each field on schema to represents data. A resolver tells how and where to access certain field. For example, whether to get field's data from database, or text file.

Some says GraphQL is "REST API killer", "The next REST API", et cetera.

But what is GraphQL and why facebook, netflix, github, and some large names shift their technology to GraphQL? Is it true that GraphQL is "REST API killer"? Or the contrary, it is "REST API friend"?

In this course, we will learn the GraphQL fundamentals, including data types, schemas, and graphql operations. We will learn using Java Spring Boot and Netflix DGS framework to easily build GraphQL Java application. In this course, we will not only learn theories, but do a hands-on coding using PostgreSQL as database.

Complete source code is provided for the course, so you will always stay up-to-date and have reference in case you are having difficulty (believe me, GraphQL will not that hard). If you are new to GraphQL, or if you've been trying to find out how to implement your own GraphQL server (especally using Java), but sometimes feel like you still don't quite understand, then this GraphQL course is absolutely suitable for you!

In this course, we will learn:

• What is GraphQL

• GraphQL schema, data types, and relationships

• Custom GraphQL data types

• Creating your own GraphQL backend using Java Spring Boot and PostgreSQL database

• We will learn using Netflix GraphQL framework (Netflix DGS)

• Securing GraphQL endpoint

• and manymore

If you ever writing REST API before, this course will expand your knowledge and see how easy you can implement GraphQL fundamental. It's not very different with REST API implementation, but at some aspects, it's more powerful.

Take the course and experience yourself!

Spring Boot Version

This course uses Spring Boot version 3.x. Most of the code will still works with Spring Boot version 2.x, but for best learning experience, it is reccomended that you use latest Spring Boot version 3.x