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Mastering Clojure

You're reading from   Mastering Clojure Understand the philosophy of the Clojure language and dive into its inner workings to unlock its advanced features, methodologies, and constructs

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Product type Paperback
Published in Mar 2016
Publisher Packt
ISBN-13 9781785889745
Length 266 pages
Edition 1st Edition
Languages
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Author (1):
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Akhil Wali Akhil Wali
Author Profile Icon Akhil Wali
Akhil Wali
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Table of Contents (14) Chapters Close

Preface 1. Working with Sequences and Patterns FREE CHAPTER 2. Orchestrating Concurrency and Parallelism 3. Parallelization Using Reducers 4. Metaprogramming with Macros 5. Composing Transducers 6. Exploring Category Theory 7. Programming with Logic 8. Leveraging Asynchronous Tasks 9. Reactive Programming 10. Testing Your Code 11. Troubleshooting and Best Practices A. References
Index

Chapter 8. Leveraging Asynchronous Tasks

The term asynchronous programming refers to defining tasks that are executed asynchronously on different threads of execution. While this is similar to multithreading, there are a few subtle differences. Firstly, a thread or a future will remain allocated to a single operating system thread until completion. This leads to the fact that is there can only be a limited number of futures that can be executed concurrently, depending on the number of processing cores available. On the other hand, asynchronous tasks are scheduled for execution on threads from a thread pool. This way, a program can have thousands, or even millions of asynchronous tasks running concurrently. An asynchronous task can be suspended at any time, or parked, and the underlying thread of execution can be reallocated to another task. Asynchronous programming constructs also allow the definition of an asynchronous task to look like a sequence of synchronous calls, but each...

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