SwiftNats

Swift 5.0 client for NATS, the cloud native messaging system. https://nats.io

For Swift 3 version, please check branch Swift3.

Install

CocoaPods

platform :ios, '12.2'
use_frameworks!

pod 'SwiftNats', '~> 5.0.0'

Carthage

You can use Carthage to install SwiftNats by adding it to your Cartfile:

github "travelish/SwiftNats" ~> 5.0.0

If you use Carthage to build your dependencies, make sure you have added SwiftNats.framework to the "Linked Frameworks and Libraries" section of your target, and have included them in your Carthage framework copying build phase.

Usage

Import the package

import SwiftNats

Declare it with strong reference

var pubsub: Nats!

Basic features:

class ViewController: UIViewController, NatsDelegate {
    var pubsub: Nats!
    override func viewDidLoad() {
        super.viewDidLoad()

        pubsub = Nats(url: "nats://localhost:4222")
        pubsub.delegate = self

        //Connect
        pubsub.connect()

        //Subscribe subject
        let subject = "gossip"
        pubsub.subscribe(subject)

        //Publish
        let time = dispatch_time(DISPATCH_TIME_NOW, Int64(2 * Double(NSEC_PER_SEC)))
        dispatch_after(time, dispatch_get_main_queue()) { [weak self] in
            guard let s = self else { return }
                for index in 1...2 {
                s.pubsub.publish(subject, payload: "\(index)")
            }
        }

        //Disconnect
        pubsub.disconnect()
    }

Delegate

public protocol NatsDelegate: class {
    func natsDidConnect(nats: Nats)
    func natsDidDisconnect(nats: Nats, error: NSError?)
    func natsDidReceiveMessage(nats: Nats, msg: NatsMessage)
    func natsDidReceivePing(nats: Nats)
}

Why use strong reference a.k.a property? Because of NSStreamDelegate is weak & unsafe, it does not retain the object:

unowned(unsafe) var delegate: NSStreamDelegate?

To do

Synchronous Messaging.
Request Reply.
Queueing.
Testing.

The MIT License (MIT)

theguywhodrinkscoffeeandcodes@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lemonkey / SwiftNats