├── .gitignore ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md └── src ├── lib.rs └── messages.rs /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | # Created by https://www.gitignore.io/api/rust,macos 3 | 4 | ### macOS ### 5 | *.DS_Store 6 | .AppleDouble 7 | .LSOverride 8 | 9 | # Icon must end with two \r 10 | Icon 11 | 12 | # Thumbnails 13 | ._* 14 | 15 | # Files that might appear in the root of a volume 16 | .DocumentRevisions-V100 17 | .fseventsd 18 | .Spotlight-V100 19 | .TemporaryItems 20 | .Trashes 21 | .VolumeIcon.icns 22 | .com.apple.timemachine.donotpresent 23 | 24 | # Directories potentially created on remote AFP share 25 | .AppleDB 26 | .AppleDesktop 27 | Network Trash Folder 28 | Temporary Items 29 | .apdisk 30 | 31 | ### Rust ### 32 | # Generated by Cargo 33 | # will have compiled files and executables 34 | /target/ 35 | 36 | # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries 37 | # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html 38 | Cargo.lock 39 | 40 | # These are backup files generated by rustfmt 41 | **/*.rs.bk 42 | 43 | 44 | # End of https://www.gitignore.io/api/rust,macos 45 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | authors = ["Mathieu Amiot "] 3 | categories = [ 4 | "network-programming", 5 | "web-programming", 6 | "database", 7 | ] 8 | description = "Actix actor for NATS Message Broker" 9 | documentation = "https://docs.rs/actix-nats" 10 | homepage = "https://github.com/YellowInnovation/actix-nats" 11 | include = [ 12 | "**/*.rs", 13 | "Cargo.toml", 14 | ] 15 | keywords = [ 16 | "actor", 17 | "nats", 18 | "actix", 19 | ] 20 | license = "MIT/Apache-2.0" 21 | name = "actix-nats" 22 | readme = "README.md" 23 | repository = "https://github.com/YellowInnovation/actix-nats" 24 | version = "0.4.1" 25 | 26 | [dependencies] 27 | actix = "0.7" 28 | backoff = "0.1" 29 | futures = "0.1" 30 | log = "0.4" 31 | nitox = "0.1" 32 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | 2 | Version 2.0, January 2004 3 | https://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 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Actix-NATS 2 | 3 | [![Crates.io](https://img.shields.io/crates/v/actix-nats.svg)](https://crates.io/crates/actix-nats) 4 | [![docs.rs](https://docs.rs/actix-nats/badge.svg)](https://docs.rs/actix-nats) 5 | 6 | ## Description 7 | 8 | Actix actor for NATS Message Broker. Makes use of our `nitox` NATS Async client 9 | 10 | ## Documentation 11 | 12 | Here: [http://docs.rs/actix-nats](http://docs.rs/actix-nats) 13 | 14 | ## Installation 15 | 16 | ```toml 17 | [dependencies] 18 | actix-nats = "0.4" 19 | ``` 20 | 21 | ## License 22 | 23 | Licensed under either of these: 24 | 25 | * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or 26 | [https://www.apache.org/licenses/LICENSE-2.0](https://www.apache.org/licenses/LICENSE-2.0) 27 | * MIT license ([LICENSE-MIT](LICENSE-MIT) or 28 | [https://opensource.org/licenses/MIT](https://opensource.org/licenses/MIT)) 29 | 30 | ## Yellow Innovation 31 | 32 | Yellow Innovation is the innovation laboratory of the French postal service: La Poste. 33 | 34 | We create innovative user experiences and journeys through services with a focus on IoT lately. 35 | 36 | [Yellow Innovation's website and works](http://yellowinnovation.fr/en/) 37 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | extern crate actix; 2 | extern crate backoff; 3 | extern crate futures; 4 | #[macro_use] 5 | extern crate log; 6 | pub extern crate nitox; 7 | 8 | use actix::prelude::*; 9 | use backoff::backoff::Backoff; 10 | use backoff::ExponentialBackoff; 11 | use futures::{future, Future}; 12 | use nitox::{ 13 | commands::{Message as NatsMessage, PubCommand as NatsPublish}, 14 | NatsClient, NatsClientOptions, NatsError, 15 | }; 16 | 17 | mod messages; 18 | pub use self::messages::*; 19 | 20 | /// Actor to give to Actix to do the background processing of NATS messages/requests 21 | #[derive(Default)] 22 | pub struct NATSActor { 23 | inner: Option, 24 | backoff: ExponentialBackoff, 25 | opts: NatsClientOptions, 26 | } 27 | 28 | impl NATSActor { 29 | /// Start new `Supervisor` with `NATSActor`. 30 | pub fn start(opts: NatsClientOptions) -> Addr { 31 | let mut backoff = ExponentialBackoff::default(); 32 | backoff.max_elapsed_time = None; 33 | 34 | debug!(target: "actix-nats", "Starting Supervisor/Actor with opts {:#?}", opts); 35 | Supervisor::start(move |_| NATSActor { 36 | opts, 37 | backoff, 38 | inner: None, 39 | }) 40 | } 41 | } 42 | 43 | impl Actor for NATSActor { 44 | type Context = Context; 45 | 46 | fn started(&mut self, ctx: &mut Self::Context) { 47 | debug!(target: "actix-nats", "Starting client..."); 48 | NatsClient::from_options(self.opts.clone()) 49 | .and_then(|client| { 50 | debug!(target: "actix-nats", "Client created {:#?}", client); 51 | client.connect() 52 | }).into_actor(self) 53 | .map(|client, act, _| { 54 | info!(target: "actix-nats", "Connected to NATS server: {:#?}", client); 55 | act.inner = Some(client); 56 | act.backoff.reset(); 57 | }).map_err(|err, act, ctx| { 58 | error!(target: "actix-nats", "Cannot connect to NATS server: {}", err); 59 | if let Some(timeout) = act.backoff.next_backoff() { 60 | ctx.run_later(timeout, |_, ctx| ctx.stop()); 61 | } 62 | }).wait(ctx); 63 | } 64 | } 65 | 66 | impl Supervised for NATSActor { 67 | fn restarting(&mut self, _: &mut Self::Context) { 68 | debug!(target: "actix-nats", "Supervisor restarted actor"); 69 | self.inner.take(); 70 | self.backoff.reset(); 71 | } 72 | } 73 | 74 | impl Handler for NATSActor { 75 | type Result = ResponseFuture<(), NatsError>; 76 | 77 | fn handle(&mut self, msg: PublishMessage, _: &mut Self::Context) -> Self::Result { 78 | if let Some(ref mut client) = self.inner { 79 | let cmd = match NatsPublish::builder() 80 | .subject(msg.subject) 81 | .payload(msg.data) 82 | .build() 83 | { 84 | Ok(cmd) => cmd, 85 | Err(e) => return Box::new(future::err(NatsError::CommandBuildError(e))), 86 | }; 87 | 88 | Box::new(client.publish(cmd)) 89 | } else { 90 | error!(target: "actix-nats", "Cannot send message because client is not ready"); 91 | Box::new(future::err(NatsError::ServerDisconnected(None))) 92 | } 93 | } 94 | } 95 | 96 | impl Handler for NATSActor { 97 | type Result = ResponseFuture; 98 | 99 | fn handle(&mut self, msg: RequestWithReply, _: &mut Self::Context) -> Self::Result { 100 | if let Some(ref mut client) = self.inner { 101 | debug!(target: "actix-nats", "Sending request with payload {:#?}", msg); 102 | Box::new(client.request(msg.subject, msg.data.into())) 103 | } else { 104 | error!(target: "actix-nats", "Cannot send message because client is not ready"); 105 | Box::new(future::err(NatsError::ServerDisconnected(None))) 106 | } 107 | } 108 | } 109 | -------------------------------------------------------------------------------- /src/messages.rs: -------------------------------------------------------------------------------- 1 | use actix::prelude::*; 2 | use nitox::{commands::Message as NatsMessage, NatsError}; 3 | 4 | /// PublishMessage is a message that publishes a buffer to the NATS queue but doesn't wait for a reply afterwards. 5 | /// Think of it as the Pub part in PubSub. 6 | #[derive(Debug, Clone)] 7 | pub struct PublishMessage { 8 | pub(crate) subject: String, 9 | pub(crate) data: Vec, 10 | } 11 | 12 | impl PublishMessage { 13 | pub fn new(subject: String, data: Vec) -> Self { 14 | PublishMessage { subject, data } 15 | } 16 | } 17 | 18 | impl Message for PublishMessage { 19 | type Result = Result<(), NatsError>; 20 | } 21 | 22 | /// Subscribe is a message that subscribes to a topic in the NATS queue 23 | /// Think of it as the Sub part in PubSub. 24 | /*#[derive(Debug, Clone)] 25 | pub struct Subscribe { 26 | pub(crate) subject: String, 27 | pub(crate) unsub_after: Option, 28 | } 29 | 30 | impl Subscribe { 31 | pub fn new(subject: String, unsub_after: Option) -> Self { 32 | Subscribe { 33 | subject, 34 | unsub_after, 35 | } 36 | } 37 | } 38 | 39 | impl Message for Subscribe { 40 | type Result = Box>; 41 | }*/ 42 | 43 | /// RequestWithReply creates a reply inbox in NATS, publishes a message (Request in terms of NATS grammar) 44 | /// and waits for the reply to come back. 45 | #[derive(Debug, Clone)] 46 | pub struct RequestWithReply { 47 | pub(crate) subject: String, 48 | pub(crate) data: Vec, 49 | } 50 | 51 | impl RequestWithReply { 52 | pub fn new(subject: String, data: Vec) -> Self { 53 | RequestWithReply { subject, data } 54 | } 55 | } 56 | 57 | impl Message for RequestWithReply { 58 | type Result = Result; 59 | } 60 | --------------------------------------------------------------------------------