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Implementation-agnostic asynchronous code

License: MIT License

Swift 100.00%

swift cocoapods promises promise-library futures asynchronous async-programming swift-4 agnostic-implementation tested

asynchronous's Introduction

Asynchronous

Asynchronous is a one-stop shop for your async needs, the user can use the subspecs to automatically run the Async code using completion handlers, BrightFutures, HydraAsync, PromiseKit, Promises, then and much more!

The ultimate answer to which asynchronous abstraction should I use in my API?, just use Asynchronous and give your users freedom without the headache of adding several dependencies and different abstractions to your code!

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Sample use case

Let's say you're writing a mobile SDK that does asynchronous tasks (such as HTTP requests), just like the following:

func getUser(by id: String) -> Async<User> {
    return Async { resolve, reject in
        let url = APIRouter.route(for: .users, id: id)
        let request = URLRequest(url: url)

        let session = URLSession.shared
        let task = session.dataTask(with: request) { data, response, error in
            if let error = error {
                reject(error) // You can also `throw error`!
            } else if let data = data {
                do {
                    let user = try JSONDecoder().decode(User.self, from: data)
                    resolve(user)
                } catch (let error) {
                    reject(error)
                }
            } else {
                reject(NSError(domain: "my.domain", code: 123))
            }
        }
        task.resume()
    }
}

That's it! You simply create an Async and call resolve or reject once your task is finished.

The user can either add a completion block or use their favorite asynchronous abstraction:

Completion

apiClient.getUser(by: id).async { user, error in
    if let user = value {
        userName.text = user.name
    } else {
        display(error: error)
    }
}

Promise

apiClient.getUser(by: id).promise()
.then { user in
    userName.text = user.name
}.catch { error in
    display(error: error)
}

Installation

Async is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'Asynchronous'

Available Subspecs

Name	Description
`Asynchronous/Alamofire`	Alamofire support
`Asynchronous/BrightFutures`	BrightFutures support
`Asynchronous/HydraAsync`	HydraAsync support
`Asynchronous/PromiseKit`	PromiseKit support
`Asynchronous/Promises`	Promises support
`Asynchronous/Then`	then support