Wasm Component Composition with Spin 4.0

This repository contains sample code demonstrating WebAssembly (Wasm) Component Composition using CNCF Spin and the Wasm Component Model....

📖 Full Guide & Tutorial

For step-by-step guidance, detailed code walkthroughs, and conceptual explanations, check out the official blog post:

👉 Read the full guide on my blog

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🚀 Getting Started

Prerequisites

• spin CLI (version 4.0.2 or newer)
• Rust toolchain (with wasm32-wasip2 target)

Quickstart

Clone the repository

git clone git@github.com:ThorstenHans/component-composition-spin.git
cd component-composition-spin

Build All Components

The application manifest spin.toml is configured to compile all components. The application component and the classifier component. All you have to do is run spin build:

spin build

Run The Application Locally

To run the application on your host use spin up:

spin up

Test The App

Use curl and send several messages to the Spin application:

# an urgent message
curl -XPOST -d '{"message": "Buy milk ASAP"}' \
  -H 'content-type:application/json' \
  localhost:3000

# a relaxed message
curl -XPOST -d '{"message": "Someday we should buy milk"}' \
  -H 'content-type:application/json' \
  localhost:3000

# a neutral message
curl -XPOST -d '{"message": "Buy milk"}' \
  -H 'content-type:application/json' \
  localhost:3000