mxcl/PromiseKit
PromiseKit
PromiseKit is a future-based concurrency framework and promise library for Swift and Objective-C. It functions as an asynchronous workflow coordinator, representing the eventual result of an operation to simplify concurrency logic and replace nested callback structures.
The framework enables the coordination of both sequential and parallel asynchronous tasks. It provides a structured pipeline for chaining operations, allowing the results of one task to be passed into the next and facilitating the execution of multiple operations simultaneously.
The library includes a state-machine based resolution system to track pending, fulfilled, or rejected states with thread-safe transitions. It utilizes generic-type value wrapping and an error-propagation pipeline to pass failure states to designated handlers. It also provides utilities for coordinating network requests and aggregating concurrent tasks.
Features
- Asynchronous Flow Coordination - Provides a comprehensive framework for coordinating sequential and parallel asynchronous operations using promise-based flows.
- Swift Task Libraries - Provides native Swift primitives for managing complex asynchronous workflows and promise-based task chaining.
- Generic Containers - Uses Swift generics to encapsulate future values of specific types within safe container objects.
- Asynchronous Programming Libraries - Enables unified asynchronous task chaining and failure management specifically for Objective-C.
- Promise-Based Chains - Implements interfaces for linking asynchronous operations into sequences that automatically propagate results and errors.
- Concurrent Aggregators - Collects multiple independent promises into a single unit that resolves only when all constituents complete.
- Thread-Safe State Transitions - Employs locks and atomic operations to prevent race conditions during promise resolution across multiple threads.
- Error Propagation Systems - Implements an error-propagation pipeline that passes failure states through a chain of handlers to a final catch block.
- Future-Based Concurrency Frameworks - Provides a future-based concurrency framework to simplify complex asynchronous logic across Swift and Objective-C.
- Parallel Task Spawning - Spawns multiple concurrent operations within a shared scope and merges their results upon completion.
- Promise Resolution State Machines - Utilizes a state-machine based resolution system to track promise states and ensure single-value delivery.
- Network Request Coordination - Coordinates the execution of multiple API calls in a specific order through a structured processing pipeline.
- Asynchronous Request Execution - Provides a promise-based system for executing non-blocking network requests and chaining API responses.
- Async and Event Handling - Standard promise implementation for Apple platforms.
- Developer Utilities - Asynchronous programming using promises.
- Event Bus Systems - Implementation of Promises for asynchronous tasks.
- Event Handling - Library for asynchronous promise programming.
- Language Extensions - Implementation of promises for asynchronous code.
