POC for consumption of GraphQL API in AEM

This POC defines that GraphQL API can be consumed by one of the following approach.

Based on my research i felt best to use Apollo Client because Apollo Client is a state management library that simplifies managing remote and local data with GraphQL. Apollo Client’s intelligent caching and declarative approach to data fetching can help you iterate faster while writing less code.  Additionally, if you need custom functionality, you can create your dream client by building extensions on top of Apollo Client. (ref.)

Apollo client can be used to consume a GraphQL endpoint in AEM by implementing the following steps:

1. Install Apollo client in your AEM project using npm or yarn.
2. In your AEM component code, import the Apollo client and configure it to communicate with your GraphQL endpoint.
3. Define the GraphQL query that you want to execute using the Apollo client.
4. Use the Apollo client to execute the query and retrieve the data from the GraphQL endpoint.
5. Use the data retrieved from the GraphQL endpoint to render the content on the AEM page.

Refer to this example for above 3 steps – (reference)

Here is a sample code for consuming a GraphQL endpoint in AEM using Apollo client:

import { ApolloClient, gql, HttpLink, InMemoryCache } from 'apollo-boost';

const client = new ApolloClient({
  cache: new InMemoryCache(),
  link: new HttpLink({
  uri: 'https://your-gql-endpoint.com/graphql',
 }),
});

const query = gql '{ allCars { id make model year color price }';

client.query({query: query,}).then((data) => {console.log(data);
});

In this example, the Apollo client is configured to communicate with a GraphQL endpoint hosted at ‘https://your-gql-endpoint.com/graphql‘. The query defined in the code retrieves data for all cars from the GraphQL endpoint.