FastStream is an open-source Python messaging framework designed for building asynchronous web services that interact with event streams. It simplifies the creation of producers and consumers for message queues, automates parsing, networking, and documentation generation, and streamlines workflows to accelerate progress. FastStream is particularly suited for modern, data-centric microservices and supports multiple message brokers including Kafka, RabbitMQ, and NATS.
The framework leverages Pydantic for validating and serializing incoming messages, and it automatically generates AsyncAPI documentation. It offers an intuitive development experience with full-typed editor support, a powerful dependency injection system, and in-memory test support to enhance CI/CD pipelines. FastStream is also highly extensible, allowing for custom serialization, middleware, and lifespan extensions.
Moreover, FastStream integrates seamlessly with any HTTP framework, with a special emphasis on compatibility with FastAPI. It is optimized for automatic code generation using advanced models like GPT and Llama, making it a go-to solution for developers looking to streamline their messaging infrastructure in microservices.
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