panlw/using-graphql-java

Using graphql-java and graphql-java-kickstart on Spring Boot

GraphQL

GraphQL Spring Boot

groupId: com.graphql-java-kickstart

• starter: graphql-spring-boot-starter -> /graphql
• unit test: graphql-spring-boot-starter-test
• schema viewer: voyager-spring-boot-starter -> /voyager
• clients:
  • playground-spring-boot-starter -> /playground -> recommended (BETTER than Playground Application)
  • graphiql-spring-boot-starter -> /graphiql
  • altair-spring-boot-starter -> /altair

Using Resolver (by graphql-tools)

BETTER than using DataFetcher

Using Data Loader

Resolve "N+1" fetch problem

• https://github.com/graphql-java-kickstart/graphql-spring-boot/tree/master/example-request-scoped-dataloader
• graphql.servlet.contextSetting: PER_REQUEST_WITH_INSTRUMENTATION (graphql.kickstart.execution.context.ContextSetting)
• https://www.graphql-java.com/documentation/v13/data-fetching/
• https://www.graphql-java.com/documentation/v13/batching/

Resolve authentication & authorization

• https://github.com/graphql-java-kickstart/samples/blob/master/subscription-with-authentication
• https://www.howtographql.com/graphql-java/5-authentication/

Resolve custom scalar

• graphql.schema.GraphQLEnumType

Resolve custom directives (TODO)

https://www.graphql-java-kickstart.com/tools/directives/

Using WebSocket Subscription (TODO)

• https://www.graphql-java.com/documentation/v13/subscriptions/
• https://github.com/graphql-java-kickstart/samples/blob/master/subscription-with-authentication/
• https://github.com/graphql-java-kickstart/graphql-spring-boot/blob/master/example-graphql-subscription/

Unrecommended

• Using DataFetcher
• Graphql Playground Application