poc-wasm-wasi-preview-2-plugin-system

Proof of Concept: Implement a Plugin System using WASM WASI preview 2

Compile and run POC

Prepare Environment

cargo install cargo-component --locked
rustup target add wasm32-wasi

Compile Plugin API

cd reactive-graph-plugin-api
cargo component build
cd -

• Generates a reactive-graph-plugin-api/src/bindings.rs
• Generates libreactive_graph_plugin_api.rlib
• Used by the custom plugin and by the host system

Compile Custom Plugin to WASM

cd reactive-graph-custom-plugin
cargo component build
cd -

• Generates a reactive-graph-custom-plugin/src/bindings.rs
• Generates reactive_graph_custom_plugin.wasm
• WASM file is loaded by the host system at runtime

Run Host-System

cargo run

• The host system loads the WASM plugin
• The host system executes the greeting function of the loaded plugin
• The custom plugin directly prints to stdout
• The custom plugin receives a string parameter
• The custom plugin generates and returns a greeting message
• The host system prints the returned greeting message

POC Status

• Completed
• Implementation functional
• Tooling functional

Use cases

• Reactive Graph could use this to load plugins written in "any" language that compiles to WASM
• Reactive Graph could use this to load behaviours for reactive entities or reactive relations

Conclusion

• Very useful
• Can be used for behaviours AND for non-native-plugins
• Should be integrated