API Gateway

Description

An API Gateway is a server that acts as an API front-end, receiving API requests, enforcing throttling and security policies, passing requests to the back-end service and then passing the response back to the requester.

Where to use

• Unified entry point for microservices.
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• Authentication and Rate Limiting.
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• Protocol translation.

Real World Example

Mobile App sends all requests to 'api.company.com'. The Gateway routes 'api/users' to User Service and 'api/orders' to Order Service.

Code Example

# Code Concept for API Gateway\n# This pattern is architectural.\n\nclass Service:\n    def execute(self):\n        # Implementation logic\n        pass