Apollo Server vs Apollo Server Express - #5
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Difference Between Apollo Server and Apollo Server Express
Apollo Server and Apollo Server Express are both part of the Apollo GraphQL ecosystem, but they serve different use cases based on the requirements of your application architecture.
Apollo Server:
Apollo Server is a standalone GraphQL server that is designed to run independently. It is suitable for simple applications or when you want a dedicated GraphQL server without the need to integrate with other frameworks or middleware.
Key Features:
Standalone: Runs as a dedicated GraphQL server.
Simplicity: Easy to set up and configure for quick prototyping.
GraphQL Playground: Comes with an in-browser IDE for testing queries and mutations.
Performance Monitoring: Integrates with Apollo Studio for monitoring and tracing queries.
Usage Scenario:
Ideal for small projects or microservices where you need a quick and straightforward GraphQL server.
Suitable for environments where you do not need complex middleware or routing logic.
Example:
JavaScript code:
const { ApolloServer, gql } = require('apollo-server');
const typeDefs = gql`
type Query {
hello: String
}
`;
const resolvers = {
Query: {
hello: () = 'Hello, world!',
},
};
const server = new ApolloServer({ typeDefs, resolvers });
server.listen().then(({ url }) = {
console.log(`🚀 Server ready at ${url}`);
});
Apollo Server Express
Apollo Server Express is designed to be used with the Express.js framework. It allows you to integrate GraphQL functionality into an existing Express application, leveraging the middleware capabilities and routing of Express.
Key Features:
Express Integration: Works as middleware for an Express application.
Middleware Support: Can use Express middleware for logging, authentication, error handling, etc.
Flexibility: Suitable for complex applications where you need both REST and GraphQL endpoints.
Custom Routing: Allows combining GraphQL and traditional REST routes within the same server.
Usage Scenario:
Ideal for larger applications where you need to integrate GraphQL into an existing Express.js application.
Suitable for projects that require complex middleware and routing logic alongside GraphQL.
Example:
javascript
Copy code
const express = require('express');
const { ApolloServer, gql } = require('apollo-server-express');
const typeDefs = gql`
type Query {
hello: String
}
`;
const resolvers = {
Query: {
hello: () = 'Hello, world!',
},
};
async function startServer() {
const app = express();
const server = new ApolloServer({ typeDefs, resolvers });
await server.start();
server.applyMiddleware({ app });
app.listen({ port: 4000 }, () =
console.log(`🚀 Server ready at http://localhost:4000${server.graphqlPath}`)
);
}
startServer();
Conclusion
Apollo Server is best for simple, standalone GraphQL servers where ease of setup and quick development are priorities.
Apollo Server Express is ideal for integrating GraphQL into existing Express applications, offering greater flexibility and middleware support for more complex use cases.
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