├── .gitignore ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md ├── examples ├── basic.rs ├── multi_bridge.rs └── websocket.rs └── src └── lib.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "wactor" 3 | version = "0.1.1" 4 | authors = ["Noah "] 5 | edition = "2018" 6 | description = "Wasm actor system based off lunatic" 7 | license = "Apache-2.0/MIT" 8 | 9 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 10 | 11 | [dependencies] 12 | lunatic = { git = "https://github.com/lunatic-solutions/rust-lib.git" } 13 | serde = "1.0.124" 14 | 15 | [dev-dependencies] 16 | # bincode = "1.3.2" 17 | # tungstenite = { version = "0.13.0", default-features = false } 18 | 19 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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IN NO EVENT SHALL THE 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 19 | SOFTWARE. 20 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Wactor 2 | A dead simple actor api wrapper for [lunatic](https://github.com/lunatic-solutions/lunatic). 3 | 4 | Actors run on isolated green threads. They cannot share memory, and communicate only through input 5 | and output messages. Consequently messages must be serialized to travel between threads. 6 | 7 | ## Example 8 | ```rust 9 | use serde::{Deserialize, Serialize}; 10 | use wactor::*; 11 | 12 | struct Counter { 13 | count: u32, 14 | } 15 | 16 | #[derive(Serialize, Deserialize)] 17 | enum Input { 18 | AddOne, 19 | } 20 | 21 | #[derive(Serialize, Deserialize, PartialEq, Debug)] 22 | enum Output { 23 | Count(u32), 24 | } 25 | 26 | impl Actor for Counter { 27 | type Input = Input; 28 | type Output = Output; 29 | 30 | fn create() -> Self { 31 | Self { count: 0 } 32 | } 33 | 34 | fn handle(&mut self, msg: Self::Input, link: &Link) { 35 | match msg { 36 | Input::AddOne => { 37 | // Increment count by 1. 38 | self.count += 1; 39 | // Respond with new count. This fails if our recipient has been dropped. 40 | link.respond(Output::Count(self.count)).ok(); 41 | } 42 | } 43 | } 44 | } 45 | 46 | fn main() { 47 | // Spawn our actor. We get a bridge for sending and receiving messages. Can be cloned for 48 | // multiple owners. Actor is dropped after all bridges have been dropped. 49 | let bridge = wactor::spawn::(); 50 | // Send our input message. This fails if our actor has panicked (unrecoverable error). 51 | bridge.send(Input::AddOne).expect("Dead actor"); 52 | // Block until a response is received. This also fails if our actor has panicked. 53 | let result = bridge.receive(); 54 | // Assert we received the correct value. 55 | assert_eq!(result, Ok(Output::Count(1))); 56 | } 57 | ``` 58 | 59 | ### How to run 60 | Install lunatic then build and run: 61 | 62 | cargo build --release --target=wasm32-wasi --example basic 63 | lunatic target/wasm32-wasi/release/examples/basic.wasm 64 | -------------------------------------------------------------------------------- /examples/basic.rs: -------------------------------------------------------------------------------- 1 | use lunatic::Mailbox; 2 | use serde::{Deserialize, Serialize}; 3 | use wactor::*; 4 | 5 | struct Counter { 6 | count: u32, 7 | } 8 | 9 | #[derive(Serialize, Deserialize)] 10 | enum Input { 11 | AddOne, 12 | } 13 | 14 | #[derive(Serialize, Deserialize, PartialEq, Debug)] 15 | enum Output { 16 | Count(u32), 17 | } 18 | 19 | impl Actor for Counter { 20 | type Input = Input; 21 | type Output = Output; 22 | type Context = (); 23 | 24 | fn create(_ctx: Self::Context) -> Self { 25 | Self { count: 0 } 26 | } 27 | 28 | fn handle(&mut self, msg: &Self::Input, _link: &Link) -> Self::Output { 29 | match msg { 30 | Input::AddOne => { 31 | // Increment count by 1. 32 | self.count += 1; 33 | // Respond with new count. This fails if our recipient has been dropped. 34 | Output::Count(self.count) 35 | } 36 | } 37 | } 38 | } 39 | 40 | #[lunatic::main] 41 | fn main(_m: Mailbox<()>) { 42 | // Spawn our actor. We get a bridge for sending and receiving messages. Can be cloned for 43 | // multiple owners. Actor is dropped after all bridges have been dropped. 44 | let actor = wactor::spawn::().unwrap(); 45 | // Send our input message. This fails if our actor has panicked (unrecoverable error). 46 | let result = actor.request(Input::AddOne).expect("Dead actor"); 47 | // Assert we received the correct value. 48 | assert_eq!(result, Output::Count(1)); 49 | } 50 | -------------------------------------------------------------------------------- /examples/multi_bridge.rs: -------------------------------------------------------------------------------- 1 | use serde::{Deserialize, Serialize}; 2 | use wactor::*; 3 | 4 | struct Counter { 5 | count: u32, 6 | } 7 | 8 | #[derive(Serialize, Deserialize)] 9 | enum Input { 10 | AddOne, 11 | } 12 | 13 | #[derive(Serialize, Deserialize, PartialEq, Debug)] 14 | enum Output { 15 | Count(u32), 16 | } 17 | 18 | impl Actor for Counter { 19 | type Input = Input; 20 | type Output = Output; 21 | 22 | fn create() -> Self { 23 | Self { count: 0 } 24 | } 25 | 26 | fn handle(&mut self, msg: Self::Input, link: &Link) { 27 | match msg { 28 | Input::AddOne => { 29 | self.count += 1; 30 | link.respond(Output::Count(self.count)).ok(); 31 | } 32 | } 33 | } 34 | } 35 | 36 | fn main() { 37 | let one = wactor::spawn::(); 38 | let two = one.clone(); 39 | 40 | one.send(Input::AddOne).ok(); 41 | two.send(Input::AddOne).ok(); 42 | 43 | println!("{:?}", one.receive()); 44 | println!("{:?}", two.receive()); 45 | } 46 | -------------------------------------------------------------------------------- /examples/websocket.rs: -------------------------------------------------------------------------------- 1 | use lunatic::net::{TcpListener, TcpStream}; 2 | use serde::{Deserialize, Serialize}; 3 | use tungstenite::server; 4 | use wactor::*; 5 | 6 | #[derive(Serialize, Deserialize, Debug)] 7 | enum Message { 8 | Ping, 9 | Pong, 10 | } 11 | 12 | struct Server; 13 | impl Actor for Server { 14 | type Input = TcpStream; 15 | type Output = (); 16 | 17 | fn create() -> Self { 18 | Self 19 | } 20 | 21 | fn handle(&mut self, stream: Self::Input, link: &Link) { 22 | let mut ws = server::accept(stream).unwrap(); 23 | loop { 24 | let msg = ws.read_message(); 25 | match msg { 26 | Ok(tungstenite::Message::Binary(msg)) => { 27 | let msg = bincode::deserialize::(&msg).unwrap(); 28 | 29 | let response = match msg { 30 | Message::Ping => Message::Pong, 31 | Message::Pong => Message::Ping, 32 | }; 33 | 34 | let buf = bincode::serialize(&response).unwrap(); 35 | ws.write_message(buf.into()).unwrap(); 36 | 37 | // Exit loop when after a successful response 38 | break; 39 | } 40 | Err(_) => break, 41 | _ => {} 42 | } 43 | } 44 | // Signal this is actor is ready to be dropped. 45 | link.close(); 46 | } 47 | } 48 | 49 | struct Listener; 50 | impl Actor for Listener { 51 | type Input = String; 52 | type Output = (); 53 | 54 | fn create() -> Self { 55 | Self 56 | } 57 | 58 | fn handle(&mut self, addr: Self::Input, link: &Link) { 59 | let listener = TcpListener::bind(&addr).expect("Failed to bind"); 60 | // Notify we're ready to accept connections. 61 | link.respond(()).unwrap(); 62 | loop { 63 | if let Ok(stream) = listener.accept() { 64 | // Spawn a server for this connection 65 | wactor::spawn::().send(stream).unwrap() 66 | } 67 | } 68 | } 69 | } 70 | 71 | fn main() { 72 | let server_url = "127.0.0.1:6000"; 73 | // Start listening 74 | wactor::spawn::() 75 | // Wait until its ready 76 | .get(server_url) 77 | .unwrap(); 78 | 79 | // Connect to our server. 80 | let client = TcpStream::connect(server_url).unwrap(); 81 | let (mut socket, _response) = 82 | tungstenite::client(format!("ws://{}", server_url), client).expect("Failed to connect"); 83 | 84 | // Let the ping pong begin! 85 | let buf = bincode::serialize(&Message::Ping).unwrap(); 86 | println!("Sending: Ping"); 87 | socket.write_message(buf.into()).unwrap(); 88 | while let Ok(msg) = socket.read_message() { 89 | if msg.is_binary() { 90 | let answer = bincode::deserialize::(&msg.into_data()).unwrap(); 91 | 92 | println!("Received: {:?}", answer); 93 | 94 | let buf = bincode::serialize(&answer).unwrap(); 95 | socket.write_message(buf.into()).ok(); 96 | } 97 | } 98 | println!("Done"); 99 | } 100 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | //! # Wactor 2 | //! WASM actor system based on [lunatic](https://github.com/lunatic-solutions/lunatic). 3 | //! 4 | //! Actors run on isolated green threads. They cannot share memory, and communicate only through 5 | //! input and output messages. Consequently messages must be serialized to travel between threads. 6 | //! 7 | //! ## Example 8 | //! ```rust 9 | //! use serde::{Deserialize, Serialize}; 10 | //! use wactor::*; 11 | //! 12 | //! struct Counter { 13 | //! count: u32, 14 | //! } 15 | //! 16 | //! #[derive(Serialize, Deserialize)] 17 | //! enum Input { 18 | //! AddOne, 19 | //! } 20 | //! 21 | //! #[derive(Serialize, Deserialize, PartialEq, Debug)] 22 | //! enum Output { 23 | //! Count(u32), 24 | //! } 25 | //! 26 | //! impl Actor for Counter { 27 | //! type Input = Input; 28 | //! type Output = Output; 29 | //! 30 | //! fn create() -> Self { 31 | //! Self { count: 0 } 32 | //! } 33 | //! 34 | //! fn handle(&mut self, msg: Self::Input, link: &Link) { 35 | //! match msg { 36 | //! Input::AddOne => { 37 | //! // Increment count by 1. 38 | //! self.count += 1; 39 | //! // Respond with new count. This fails if our recipient has been dropped. 40 | //! link.respond(Output::Count(self.count)).ok(); 41 | //! } 42 | //! } 43 | //! } 44 | //! } 45 | //! 46 | //! fn main() { 47 | //! // Spawn our actor. We get a bridge for sending and receiving messages. Can be cloned for 48 | //! // multiple owners. Actor is dropped after all bridges have been dropped. 49 | //! let bridge = wactor::spawn::(); 50 | //! // Send our input message. This fails if our actor has panicked (unrecoverable error). 51 | //! bridge.send(Input::AddOne).expect("Dead actor"); 52 | //! // Block until a response is received. This also fails if our actor has panicked. 53 | //! let result = bridge.receive(); 54 | //! // Assert we received the correct value. 55 | //! assert_eq!(result, Ok(Output::Count(1))); 56 | //! } 57 | //! ``` 58 | //! 59 | //! ### How to run 60 | //! Install lunatic then build and run: 61 | //! 62 | //! cargo build --release --target=wasm32-wasi --example basic 63 | //! lunatic target/wasm32-wasi/release/examples/basic.wasm 64 | use std::cell::Cell; 65 | 66 | use lunatic::{ 67 | process::{self, Process}, 68 | LunaticError, Mailbox, ReceiveError, Request, 69 | }; 70 | use serde::{de::DeserializeOwned, Serialize}; 71 | 72 | /// Actors run on isolated green threads. The cannot share memory, and communicate only through 73 | /// input and output messages. Consequently messages must be serialized to travel between threads. 74 | pub trait Actor: Sized { 75 | type Input: Serialize + DeserializeOwned; 76 | type Output: Serialize + DeserializeOwned; 77 | type Context: Serialize + DeserializeOwned; 78 | 79 | /// Create this actor. 80 | fn create(ctx: Self::Context) -> Self; 81 | /// Handle an input message. 82 | fn handle(&mut self, msg: &Self::Input, link: &Link) -> Self::Output; 83 | } 84 | 85 | /// Spawn a new [Actor], returning its [Bridge]. Actor is dropped when all bridges have been 86 | /// dropped. 87 | pub fn spawn_with( 88 | ctx: A::Context, 89 | ) -> Result::Input, ::Output>>, LunaticError> { 90 | process::spawn_with( 91 | ctx, 92 | |ctx, mailbox: Mailbox>| { 93 | Context { 94 | link: Link { 95 | mailbox, 96 | open: Cell::new(true), 97 | }, 98 | actor: A::create(ctx), 99 | } 100 | .run() 101 | }, 102 | ) 103 | } 104 | 105 | pub fn spawn>( 106 | ) -> Result::Input, ::Output>>, LunaticError> { 107 | spawn_with::(()) 108 | } 109 | 110 | enum LinkError { 111 | Receive(ReceiveError), 112 | Closed, 113 | } 114 | 115 | /// Link for responding to input messages. 116 | pub struct Link { 117 | mailbox: Mailbox>, 118 | // Whether this link may receive messages. Setting this to true will drop actor after it's done 119 | // handling current message. 120 | open: Cell, 121 | } 122 | 123 | impl Link { 124 | /// Signal this actor should be dropped after handling current message. 125 | pub fn close(&self) { 126 | self.open.set(false); 127 | } 128 | 129 | fn receive(&self) -> Result, LinkError> { 130 | if !self.open.get() { 131 | return Err(LinkError::Closed); 132 | } 133 | 134 | self.mailbox.receive().map_err(LinkError::Receive) 135 | } 136 | } 137 | 138 | /// Context for actor execution. 139 | struct Context { 140 | link: Link, 141 | actor: A, 142 | } 143 | 144 | impl Context { 145 | fn run(mut self) { 146 | // Receive messages until we get an error, meaning all recipients have been dropped. 147 | while let Ok(request) = self.link.receive() { 148 | let response = self.actor.handle(request.data(), &self.link); 149 | request.reply(response); 150 | } 151 | } 152 | } 153 | --------------------------------------------------------------------------------