Apollo Gateway

Project Overview

Apollo Gateway acts as a unified GraphQL API gateway for the Flow OverStack platform, combining schemas from multiple microservices into a single federated schema. It routes and orchestrates queries and mutations across the underlying GraphQL services, enabling clients to interact with a consolidated API endpoint.

Technologies and Patterns Used

• Apollo Federation — for schema federation and query delegation
• Node.js & TypeScript — core runtime and language
• GraphQL — unified schema and API layer

Getting Started

Prerequisites

• Node.js
• Docker (optional for containerized deployment)
• Running underlying GraphQL microservices

Installation

1. Clone the repo

2. Configure service URLs for the federated services in supergraph.yaml

3. Install Rover CLI

4. Accecpt terms of the ELV2 License

5. Update supergraph.graphql:

   rover supergraph compose --config supergraph.yaml > supergraph.graphql

6. Install npm

7. Run the gateway:

    npm install --save-dev typescript ts-node @types/node
    npm start

Access the GraphQL endpoint at http://localhost:5000/graphql