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Akka Cookbook

You're reading from   Akka Cookbook Recipes for concurrent, fast, and reactive applications

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781785288180
Length 414 pages
Edition 1st Edition
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Authors (3):
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Vivek Mishra Vivek Mishra
Author Profile Icon Vivek Mishra
Vivek Mishra
Piyush Mishra Piyush Mishra
Author Profile Icon Piyush Mishra
Piyush Mishra
Héctor Veiga Ortiz Héctor Veiga Ortiz
Author Profile Icon Héctor Veiga Ortiz
Héctor Veiga Ortiz
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Toc

Table of Contents (12) Chapters Close

Preface 1. Diving into Akka FREE CHAPTER 2. Supervision and Monitoring 3. Routing Messages 4. Using Futures and Agents 5. Scheduling Actors and Other Utilities 6. Akka Persistence 7. Remoting and Akka Clustering 8. Akka Streams 9. Akka HTTP 10. Understanding Various Akka patterns 11. Microservices with Lagom

The Master Slave work pulling pattern

We have seen how Akka actors behave: each actor is able to process one message at a time and the rest of the messages get enqueued into the mailbox. If the code inside a given actor takes time, it's likely that the messages sent to that actor will pile up in the mailbox. If the mailbox type is unbounded, this could lead to an out-of-memory error. If it is bounded, it will probably drop messages when it reaches the maximum size. 

To have better control over this kind of scenario, we can use the Master Slave work pulling pattern. This pattern lets a master actor control how many slaves can do work and distribute it among them. It only pushes work tasks to them when they are ready. Therefore, it is possible to manage the behavior of your system when all slaves are busy doing work. For example, we could slow the consuming of data in case we are receiving...

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