Download e-book for iPad: Akka Concurrency by Derek Wyatt, Roland, Dr. Kuhn

By Derek Wyatt, Roland, Dr. Kuhn

ISBN-10: 0981531660

ISBN-13: 9780981531663

Writing actually concurrent software program at the Java digital computer simply received lots more uncomplicated. The Akka Toolkit takes the edge out of coding for a number of cores, a number of processors, or even a number of machines. Akka Concurrency will express you what it skill to layout and write software program within the paradigm of Akka. you are going to find out how to take into consideration your software program in new and intriguing ways in which will let you exhibit your designs certainly, permitting you to target the company of your software program greater than at the concurrency of it. This ebook selections up the place the Akka documentation leaves off, exploring the how and the why of Akka, in a manner that might empower you to develop your functions to new degrees of scalability, responsiveness, and function.

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If you’re finding that you’re making full copies a lot, then you’re probably using the wrong data type—or you’re just doing it wrong. We can see that the opposite is sometimes true with mutable data. If we have a reference to something that someone else has a reference to, then there are times when we must make a defensive copy of that data in order to ensure that someone doesn’t change it under our feet. In fact, I’ve seen many sections of code where people make defensive copies simply because they are finding it difficult to reason about what’s going on in their code.

Lock More Yup. If we put more locks into the User class, then we can be more selective about what gets locked when. In theory, we could open this class up to full parallelism in this situation if we can lock individual bits of data discretely. For example, lock the credit data separately from the profile data. Painful. ” You can go parallel much more naturally with immutable data structures than you can with mutable ones. But most of those who say it is better are functional programmers not imperative programmers.

Sbt does magic stuff here ... Count is 3 [success] Total time: 8 s, completed 14-Feb-2013 5:47:58 AM And we’re done. The output “Count is 3” is the successful output of the application that has just been created. We’re not going to be using that code so you should feel free to delete the file in src/main/scala/zzz/akka. scala. 1-SNAPSHOT", Download from Wow! 2 Chapter 3 · Setting Up Akka We’ll be making changes to this file as we go forward, but right now we’re set up to do some actor programming and won’t need changes for quite a while.

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Akka Concurrency by Derek Wyatt, Roland, Dr. Kuhn

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