TopicEventBus alternatives and similar libraries
Based on the "EventBus" category.
Alternatively, view TopicEventBus alternatives based on common mentions on social networks and blogs.
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Bolts
Bolts is a collection of low-level libraries designed to make developing mobile apps easier. -
promises
Promises is a modern framework that provides a synchronization construct for Swift and Objective-C. -
BrightFutures
Write great asynchronous code in Swift using futures and promises -
SwiftTask
Promise + progress + pause + cancel + retry for Swift. -
Hydra
⚡️ Lightweight full-featured Promises, Async & Await Library in Swift -
Bolts-Swift
Bolts is a collection of low-level libraries designed to make developing mobile apps easier. -
SwiftEventBus
A publish/subscribe EventBus optimized for iOS -
FutureKit
A Swift based Future/Promises Library for IOS and OS X. -
Promise
A Promise library for Swift, based partially on Javascript's A+ spec -
SwiftNotificationCenter
A Protocol-Oriented NotificationCenter which is type safe, thread safe and with memory safety -
When
:alarm_clock: A lightweight implementation of Promises in Swift -
NoticeObserveKit
NoticeObserveKit is type-safe NotificationCenter wrapper. -
RWPromiseKit
A light-weighted Promise library for Objective-C -
Promis
The easiest Future and Promises framework in Swift. No magic. No boilerplate. -
Continuum
NotificationCenter based Lightweight UI / AnyObject binder. -
Futures
Lightweight promises for iOS, macOS, tvOS, watchOS, and Linux -
Bluebird.swift
Promise/A+, Bluebird inspired, implementation in Swift 5 -
FutureLib
FutureLib is a pure Swift 2 library implementing Futures & Promises inspired by Scala.
WorkOS - The modern identity platform for B2B SaaS
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They vary from L1 to L5 with "L5" being the highest.
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README
TopicEventBus
Publish–subscribe design pattern implementation framework, with ability to publish events by topic. (NotificationCenter extended alternative)
About:
TopicEventBus is Easy to use, type safe way of implementing Publish–subscribe design pattern.
There are many other libraries out there, aiming to solve this issue, but none of them support publishing events by topic, in a type-safe way, with no magic strings.
Also, TopicEventBus holds weak referenced for Its observers, so you don't have to be afraid of memory leaks.
What is a topic?
The topic is for example, when you would like to publish "ConversationUpdateEvent" yet have the ability to publish that event only to listeners with conversation id "1234" or to all listeners.
Specifying the conversation Id is specifying a topic for that event.
Show me the code! and what's in it for me.
Let's build a chat app!
In this app, we are going to have multiple conversations screens, each one of them would like to know only about changes to Its conversation.
The first step, create an event for conversation update:
class ConversationChangedEvent: TopicEvent {
let newTitle: String
init(conversationId: String, newTitle: String) {
self.newTitle = newTitle
super.init()
self.key = conversationId
}
}
Every event must inherit from "TopicEvent," and in case it has a topic (Our example it will be the conversation id) set "key" property to the correct value.
Now inside ConversationVC, subscribe to this event:
Notice you only need to specify the return value you are expecting, for TopicEventBus to figure out the event you are subscribing for
class ConversationVC: UIViewController {
let topicEventBus: TopicEventBus
let conversationId = "1234"
init(topicEventBus: TopicEventBus) {
self.topicEventBus = topicEventBus
}
override func viewDidLoad() {
super.viewDidLoad()
_ = self.topicEventBus.subscribe(topic: conversationId, callback: { (conversationChangedEvent: ConversationChangedEvent) in
// This will run every time "ConversationChangedEvent" with id 1234 will be fired.
})
}
}
This is how you fire an event:
class FiringService {
let topicEventBus: TopicEventBus
init(topicEventBus: TopicEventBus) {
self.topicEventBus = topicEventBus
}
func conversationTitleChanged() {
self.topicEventBus.fire(event: ConversationChangedEvent.init(conversationId: "1234",
newTitle: "First update"))
}
}
You did it! You fired your first event with topic 🤗 🎉
API
If you subscribe to event and specify no topic, you will receive all events from that type, no matter their key:
_ = self.topicEventBus.subscribe { (conversationChangedEvent: ConversationChangedEvent) in
// All events from this type: ConversationChangedEvent will trigger this block
}
Unsubscribe by calling "stop" on the returned object after subscribing:
let listener = self.topicEventBus.subscribe(topic: conversationId, callback: { (conversationChangedEvent: ConversationChangedEvent) in
//
})
listener.stop()
On app log out, terminate TopicEventBus by just calling:
self.topicEventBus.terminate()
Example project
Please notice example project contains tests to support all edge cases, plus example code from the above snippets.
Installation
Cocoapods
TopicEventBus is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'TopicEventBus'
Manually
- Download and drop
/TopicEventBus
folder in your project. - Congratulations!
Author
Matan made this with ❤️.