Apollo GraphQL server mixin for Moleculer API Gateway
npm install moleculer-apollo-server moleculer-web --save
This example demonstrates how to setup a Moleculer API Gateway with GraphQL mixin, that handles incoming GraphQL requests via the default /graphql
endpoint.
"use strict";
const ApiGateway = require("moleculer-web");
const { ApolloService } = require("moleculer-apollo-server");
module.exports = {
name: "api",
mixins: [
// Gateway
ApiGateway,
// GraphQL Apollo Server
ApolloService({
// Global GraphQL typeDefs
typeDefs: ``,
// Global resolvers
resolvers: {},
// API Gateway route options
routeOptions: {
path: "/graphql",
cors: true,
mappingPolicy: "restrict"
},
// https://www.apollographql.com/docs/apollo-server/v2/api/apollo-server.html
serverOptions: {
tracing: true,
engine: {
apiKey: process.env.APOLLO_ENGINE_KEY
}
}
})
]
};
Start your Moleculer project, open http://localhost:3000/graphql in your browser to run queries using graphql-playground, or send GraphQL requests directly to the same URL.
Define queries & mutations in service action definitions
module.exports = {
name: "greeter",
actions: {
hello: {
graphql: {
query: "hello: String"
},
handler(ctx) {
return "Hello Moleculer!"
}
},
welcome: {
params: {
name: "string"
},
graphql: {
mutation: "welcome(name: String!): String"
},
handler(ctx) {
return `Hello ${ctx.params.name}`;
}
}
}
};
Generated schema
type Mutation {
welcome(name: String!): String
}
type Query {
hello: String
}
$ npm test
In development with watching
$ npm run ci
Please send pull requests improving the usage and fixing bugs, improving documentation and providing better examples, or providing some testing, because these things are important.
The project is available under the MIT license.
Copyright (c) 2018 MoleculerJS