core.async and Channels

core.async gives you CSP-style channels: a channel is a queue-like coordination primitive, and you compose your program as small stages that put values onto channels and take values off channels.

Inside a go block, channel operations park rather than blocking an OS thread, which makes it practical to express a lot of waiting without a lot of threads.

1(require '[clojure.core.async :as a])
2
3(let [ch (a/chan 10)]
4  (a/go (a/>! ch {:event :ping}))
5  (a/go (println (a/<! ch))))

Java mental model: a channel can feel like BlockingQueue, but the important difference is “parking vs blocking” and the need to keep blocking I/O out of go.

In this section

• Introduction to core.async: Asynchronous Programming in Clojure
  Explore core.async, a powerful library for asynchronous programming in Clojure, inspired by CSP and Go's channels. Learn how to manage asynchronous tasks with channels and go blocks.
• Understanding Channels in Clojure's Core.async
  Explore channels in Clojure's core.async library, their types, and how they facilitate asynchronous programming by acting as message queues.
• Clojure Go Blocks and Threads: Asynchronous Execution and Lightweight Concurrency
  Explore Clojure's go blocks and threads for asynchronous execution, highlighting differences from Java's threading model.
• Async vs. Blocking Operations in Clojure: Understanding Non-Blocking Operations
  Explore the importance of non-blocking operations in Clojure's core.async, and learn to differentiate between blocking and non-blocking operations to optimize concurrency.