September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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executionContext
The Future class in the Scala SDK allows you to run computations asynchronously. We will explore this in more detail in Chapter 6, Online Shopping – Persistence, but in this section, we will explore how it makes use of implicit parameters to provide an execution context.
Open a Scala console and enter the following code. It should create a Future computation that will print the name of the current thread when it gets executed:
scala> import scala.concurrent.Futureimport scala.concurrent.Futurescala> Future(println(Thread.currentThread().getName))
Since we are missing an implicit in our scope, you should see the following error:
<console>:13: error: Cannot find an implicit ExecutionContext. You might passan (implicit ec: ExecutionContext) ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.