Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Learning Concurrent Programming in Scala
  • Toc
  • feedback
Learning Concurrent Programming in Scala

Learning Concurrent Programming in Scala

By : Prokopec
4.8 (16)
close
Learning Concurrent Programming in Scala

Learning Concurrent Programming in Scala

4.8 (16)
By: Prokopec

Overview of this book

Scala is a modern, multiparadigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way. Scala smoothly integrates the features of object-oriented and functional languages. In this second edition, you will find updated coverage of the Scala 2.12 platform. The Scala 2.12 series targets Java 8 and requires it for execution. The book starts by introducing you to the foundations of concurrent programming on the JVM, outlining the basics of the Java Memory Model, and then shows some of the classic building blocks of concurrency, such as the atomic variables, thread pools, and concurrent data structures, along with the caveats of traditional concurrency. The book then walks you through different high-level concurrency abstractions, each tailored toward a specific class of programming tasks, while touching on the latest advancements of async programming capabilities of Scala. It also covers some useful patterns and idioms to use with the techniques described. Finally, the book presents an overview of when to use which concurrency library and demonstrates how they all work together, and then presents new exciting approaches to building concurrent and distributed systems. Who this book is written for If you are a Scala programmer with no prior knowledge of concurrent programming, or seeking to broaden your existing knowledge about concurrency, this book is for you. Basic knowledge of the Scala programming language will be helpful.
Table of Contents (11 chapters)
close
close
Preface
chevron up
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Introduction
1. Introduction
Concurrent programming
The advantages of Scala
Preliminaries
Overview of new features in Scala 2.12
Summary
Exercises
2
2. Concurrency on the JVM and the Java Memory Model
2. Concurrency on the JVM and the Java Memory Model
Processes and threads
Monitors and synchronization
Volatile variables
The Java Memory Model
Summary
Exercises
3
3. Traditional Building Blocks of Concurrency
3. Traditional Building Blocks of Concurrency
The Executor and ExecutionContext objects
Atomic primitives
Lazy values
Concurrent collections
Custom concurrent data structures
Summary
Exercises
4
4. Asynchronous Programming with Futures and Promises
4. Asynchronous Programming with Futures and Promises
Futures
Promises
Futures and blocking
The Scala Async library
Alternative future frameworks
Summary
Exercises
5
5. Data-Parallel Collections
5. Data-Parallel Collections
Scala collections in a nutshell
Using parallel collections
Caveats with parallel collections
Using parallel and concurrent collections together
Implementing custom parallel collections
Summary
Exercises
6
6. Concurrent Programming with Reactive Extensions
6. Concurrent Programming with Reactive Extensions
Creating Observable objects
Composing Observable objects
Rx schedulers
Subjects and top-down reactive programming
Summary
Exercises
7
7. Software Transactional Memory
7. Software Transactional Memory
The trouble with atomic variables
Using Software Transactional Memory
Composing transactions
Retrying transactions
Transactional collections
Summary
Exercises
8
8. Actors
8. Actors
Working with actors
Communication between actors
Actor supervision
Remote actors
Summary
Exercises
9
9. Concurrency in Practice
9. Concurrency in Practice
Choosing the right tools for the job
Putting it all together - a remote file browser
Debugging concurrent programs
Summary
Exercises
10
10. Reactors
10. Reactors
The need for reactors
Getting started with Reactors
The "Hello World" program
Event streams
Reactors
Schedulers
Reactor lifecycle
Reactor system services
Protocols
Summary
Exercises

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "The next lines of code read the link and assign it to the to the BeautifulSoup function."

A block of code is set as follows:

    package org
    package object learningconcurrency {
      def log(msg: String): Unit =   
        println(s"${Thread.currentThread.getName}: $msg")
    }

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

    object ThreadsMain extends App {
      val t: Thread = Thread.currentThread      val name = t.getName
      println(s"I am the thread $name")
    }

Any command-line input or output is written as follows:

$ mkdir scala-concurrency-examples

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In order to download new modules, we will go to Files | Settings | Project Name | Project Interpreter."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
Start a 7-day FREE trial
Next Section
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete