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You're reading from Mastering Concurrency Programming with Java 8 Master the principles and techniques of multithreaded programming with the Java 8 Concurrency API

Product type Paperback

Published in Feb 2016

Publisher Packt

ISBN-13 9781785886126

Length 430 pages

Edition 1st Edition

Languages

Java

Concepts

Concurrency

Author (1):

Javier Fernández González

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Table of Contents (13) Chapters

Preface

1. The First Step – Concurrency Design Principles

2. Managing Lots of Threads – Executors FREE CHAPTER

3. Getting the Maximum from Executors

4. Getting Data from the Tasks – The Callable and Future Interfaces

5. Running Tasks Divided into Phases – The Phaser Class

6. Optimizing Divide and Conquer Solutions – The Fork/Join Framework

7. Processing Massive Datasets with Parallel Streams – The Map and Reduce Model

8. Processing Massive Datasets with Parallel Streams – The Map and Collect Model

9. Diving into Concurrent Data Structures and Synchronization Utilities

10. Integration of Fragments and Implementation of Alternatives

11. Testing and Monitoring Concurrent Applications

Index

The second example – a recommendation system

A recommendation system recommends a product or a service to a customer based on the products/services he has bought/used and on the products/services bought/used by the users that have bought/used the same services as him.

We have used the example explained in the previous section to implement a recommendation system. Each description of a product includes the reviews of a number of customers to a product. This review includes the score the customer gives to the product.

In this example, you will use these reviews to get a list of the products that may be interesting to a customer. We will obtain the list of the products purchased by a customer. In order to get that list, a list of the users who have purchased those products and the list of products purchased by those users are sorted using the average score given in the reviews. That will be the suggested products for the user.