[Typescript] Graphql Health Check

질문

Q. Typescript Graphql Health Check

A. Sure, let's create a simple health check using GraphQL and TypeScript. In this example, we'll create a GraphQL query that checks the health of your application. First, make sure you have Node.js and npm installed on your machine. Then, create a new project folder and run: $ npm init -y $ npm install express express-graphql graphql $ npm install -D typescript ts-node @types/node @types/express @types/graphql 1. Create a tsconfig.json file for TypeScript configuration: { "compilerOptions": { "target": "es6", "module": "commonjs", "outDir": "./dist", "rootDir": "./src", "strict": true, "esModuleInterop": true }, "include": ["src/**/*.ts"], "exclude": ["node_modules"] } 2. Create a src folder and add an index.ts file: { // src/index.ts import express from 'express'; import { graphqlHTTP } from 'express-graphql'; import { GraphQLSchema, GraphQLObjectType, GraphQLString } from 'graphql'; const healthCheckQueryType = new GraphQLObjectType({ name: 'HealthCheck', fields: { status: { type: GraphQLString, resolve: () => 'OK', }, }, }); const schema = new GraphQLSchema({ query: healthCheckQueryType, }); const app = express(); app.use( '/graphql', graphqlHTTP({ schema, graphiql: true, // Enable GraphiQL for testing in the browser }) ); const PORT = process.env.PORT || 3000; app.listen(PORT, () => { console.log(`Server is running on http://localhost:${PORT}/graphql`); }); 3. Add a start script to your package.json file: "scripts": { "start": "ts-node src/index.ts" } 4. Now you can run your server with: $ npm start 5. Visit http://localhost:3000/graphql in your browser to access the GraphiQL interface. You can then execute the following query: { status } 6. This will return: { "data": { "status": "OK" } } This is a basic example of a health check using GraphQL and TypeScript. You can expand and customize it based on your specific requirements.