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Access Coherence using GraphQL by Tim Middleton

Juergen Kress
PaaS Partner Adoption

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Helidon version 2.2.0 has just been released which contains support for the MicroProfile GraphQL Specification from the Eclipse Foundation. Coherence provides seamless integration with Helidon, and with the latest Coherence CE 20.12 release it is now very easy to create GraphQL endpoints to access data in Coherence.

About GraphQL

From the MicroProfile (MP) GraphQL spec page:

GraphQL is an open-source data query and manipulation language for APIs, and a runtime for fulfilling queries with existing data. GraphQL interprets strings from the client, and returns data in an understandable, predictable, pre-defined manner. GraphQL is an alternative, though not necessarily a replacement for REST.

GraphQL provides three types of data operations: query, mutation and subscription. The schema is the core of GraphQL and clearly defines the operations supported by the API, including input arguments and possible responses.

Note: The first release of the spec only supports queries and mutations.

If you would like to learn more about GraphQL in general, and GraphQL support in Helidon, please check out my Helidon MicroProfile GraphQL article before you continue.

Adding a GraphQL Endpoint to the To Do List example

In this article I will build upon the To Do list example described by Aleks Seovic in his Hello, Coherence article series. Read the complete article here.

 

 

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