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Locutus

Demo using rust for the full stack to power a simulation. This expands on the current Game Of Life tutorials/examples to include a server side simulation communicating to a client wasm app that will do the rendering. This is mostly cobbled together from examples found in the yewstack/yew and tokio-tungstenite repositories.

Modules

  • locutus-actor: Traits for defining an "Actor" that receives messages and updates when a fn tick() is called.
  • locutus-game-of-life: The simulation logic for game of life pared down from the yew/examples/game_of_life
  • locutus-client: The WASM client app to create a websocket connection to a locutus-server, starting a simulation, and rendering updates as state changes are pushed through the websocket.
  • locutus-server: The websocket server for running game of life instances. The server uses a hybrid threading model for efficiency. The server uses cooperative async tasks for handling connections, and a dedicated thread pool for running instances of GameOfLife actors.

Running

Requirements

  • Python 3
  • Rust WASM toolchain
# rust install
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
# add the wasm target to the compiler
rustup target add wasm32-unknown-unknown
# wasm-pack install
curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh;
# wasm-bindgen-cli install
cargo install wasm-bindgen-cli

Steps

  • In a terminal:
./run-server.sh
  • Wait until you see a line like:
Aug 03 11:51:54.926  INFO serve{config=Config { ip: V4(127.0.0.1), port: 9001, sim_threads: 16, sim_thread_stack_size: 2097152, tick: 33ms }}: locutus_server::server: Listening on: 127.0.0.1:9001
  • In a separate terminal:
./run-client.sh
  • Once the web page is open click the "Start Simulation" button and watch the simulation simulate.

client

  • The terminal running the server should occasional print out progress messages about how many frames have been simulatied
Aug 03 11:54:23.235  INFO serve{config=Config { ip: V4(127.0.0.1), port: 9001, sim_threads: 16, sim_thread_stack_size: 2097152, tick: 33ms }}: locutus_server::server: Peer address: 127.0.0.1:64360
Aug 03 11:54:23.235  INFO accept_connection{peer=V4(127.0.0.1:64360) tick=33ms}: locutus_server::server: Peer address: 127.0.0.1:64360
Aug 03 11:54:23.238  INFO accept_connection{peer=V4(127.0.0.1:64360) tick=33ms}: locutus_server::server: New WebSocket connection: 127.0.0.1:64360
Aug 03 11:54:23.240  INFO accept_connection{peer=V4(127.0.0.1:64360) tick=33ms}: locutus_server::server: Created simulation actor for connection: GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) }
Aug 03 11:54:23.241  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: starting new actor: GameOfLife::c0966668-2a94-4d3e-94f7-6348ff422a1e
Aug 03 11:54:23.279  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_game_of_life: Random
Aug 03 11:54:23.310  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_game_of_life: Start
Aug 03 11:54:27.211  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 120 frames
Aug 03 11:54:31.171  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 240 frames
Aug 03 11:54:35.131  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 360 frames
Aug 03 11:54:39.090  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 480 frames
Aug 03 11:54:43.052  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 600 frames
Aug 03 11:54:47.016  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 720 frames
Aug 03 11:54:50.972  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 840 frames
Aug 03 11:54:54.934  INFO run_actor{actor=GameOfLife { id: Id(c0966668-2a94-4d3e-94f7-6348ff422a1e) } tick=33ms}: locutus_server::server: simulated 960 frames