apollo-datasource-grpc
v1.0.2
Published
gRPC implementation of Apollo Server's Datasources. Makes it possible to use Partial Query Caching
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apollo-datasource-grpc
gRPC implementation of Apollo Server's Datasources. Makes it possible to use Partial Query Caching
Usage
To get started, install the apollo-datasource-grpc package:
yarn apollo-datasource-grpc
To define a data source, extend the GRPCDataSource class
import GRPCDataSource from 'apollo-datasource-grpc';
import * as grpc from 'grpc';
import * as protoLoader from '@grpc/proto-loader';
const packageDefinition: any = protoLoader.loadSync(__dirname + '/movies.proto');
const proto: any = grpc.loadPackageDefinition(packageDefinition).Movies;
const client = new proto.Assets(process.env.MOVIES_DATASOURCE_URL, grpc.credentials.createInsecure());
class MoviesAPI extends GRPCDataSource {
constructor() {
super();
this.client = client;
}
async getMovie(id: string) {
const meta = new grpc.Metadata();
meta.add('userId', this.context.currentUser.id);
return this.callRPC(0, { args: { id }, meta, rpcName: 'GetMovie' });
}
async getMostViewedMovies() {
const meta = new grpc.Metadata();
meta.add('userId', this.context.currentUser.id);
return (await this.callRPC(0, { args: {}, meta, rpcName: 'GetMovies' }) as any).movies;
}
}
export default MoviesAPI;
It's also possible to user DataLoader for batch requests