NSQ client written in rust

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A Actix based client implementation for the NSQ realtime message processing system.

Nsq-client it's designed to support by default multiple Readers for Multiple Connections, readers are routed per single connection by a round robin algorithm.

Usage

To use nsq-client, add this to your Cargo.toml: toml [dependencies] actix = "0.7" nsq-client = "0.1.2"

Create your first consumer

In order to use nsq-client you first need to create a Reader actor which implement Handler for the type of messages you want to receive from the connections and then subscribe it to the connections to be able to receive the type of messages you've selected.

Available messages are: - Msg nsqd messages sent to the Connection (routed to your Reader) - InFlight Connection message sent to the reader every time inflight is increased or decreased

Simple Consumer (SUB)

```rust extern crate nsqueue; extern crate actix;

use std::sync::Arc;

use actix::prelude::*;

use nsqueue::{Connection, Msg, Fin, Subscribe, Config};

struct MyReader { pub conn: Arc>, }

impl Actor for MyReader { type Context = Context; fn started(&mut self, ctx: &mut Self::Context) { self.subscribe::(ctx, self.conn.clone()); } }

impl Handler for MyReader { fn handle(&mut self, msg: Msg, : &mut Self::Context) { println!("MyReader received {:?}", msg); self.conn.dosend(Fin(msg.id)); } }

fn main() { let sys = System::new("consumer"); let config = Config::default().clientid("consumer"); let c = Supervisor::start(|| Connection::new( "test", // <- topic "test", // <- channel "0.0.0.0:4150", // <- nsqd tcp address Some(config), // <- config (Optional) None, // secret for Auth (Optional) Some(2) // <- RDY (Optional default: 1) )); let conn = Arc::new(c); let _ = MyReader{ conn: conn.clone() }.start(); // <- Same thread reader let _ = Arbiter::start(|_| MyReader{ conn: conn }); // <- start another reader in different thread sys.run(); } ```

launch nsqd

bash $ nsqd -verbose

launch the reader

bash $ RUST_LOG=nsq_client=debug cargo run

launch the producer

bash $ cargo run

Examples

• Simple Processing Message
• Simple Producer

ToDo

• [ ] Discovery
• [ ] TLS
• [ ] Snappy
• [ ] First-ready-first-served readers routing algorithm.

License

Licensed under * MIT license (see LICENSE or http://opensource.org/licenses/MIT)