The GoF Observer pattern is also referred to as a publish-subscribe pattern in the GoF book. The idea is simple. EventSource (classes that emits events) will have a one-to-many relationship with event sinks (classes that listen to the event notification). Every EventSource will have a mechanism for the event sinks to subscribe to, in order to get different types of notification. A single EventSource might emit multiple events. An EventSource can send notifications to thousands of subscribers (event sinks or listeners) when there is a change in state or something significant happens in its realm. The EventSource will walk through the list of subscribers and notify them one by one. The GoF book was written at a time when the world was mostly doing sequential programming. Topics such as concurrency were mostly related to platform-specific libraries or the POSIX thread library. We will write a simple C++ program to demonstrate the whole idea of the Observer pattern....
C++ Reactive Programming
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C++ Reactive Programming
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Overview of this book
Reactive programming is an effective way to build highly responsive applications with an easy-to-maintain code base. This book covers the essential functional reactive concepts that will help you build highly concurrent, event-driven, and asynchronous applications in a simpler and less error-prone way.
C++ Reactive Programming begins with a discussion on how event processing was undertaken by different programming systems earlier. After a brisk introduction to modern C++ (C++17), you’ll be taken through language-level concurrency and the lock-free programming model to set the stage for our foray into the Functional Programming model. Following this, you’ll be introduced to RxCpp and its programming model. You’ll be able to gain deep insights into the RxCpp library, which facilitates reactive programming. You’ll learn how to deal with reactive programming using Qt/C++ (for the desktop) and C++ microservices for the Web.
By the end of the book, you will be well versed with advanced reactive programming concepts in modern C++ (C++17).
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Current Title:
C++ Reactive Programming
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Free Chapter
Reactive Programming Model – Overview and History
A Tour of Modern C++ and its Key Idioms
Language-Level Concurrency and Parallelism in C++
Asynchronous and Lock-Free Programming in C++
Introduction to Observables
Introduction to Event Stream Programming Using C++
Introduction to Data Flow Computation and the RxCpp Library
RxCpp – the Key Elements
Reactive GUI Programming Using Qt/C++
Creating Custom Operators in RxCpp
Design Patterns and Idioms for C++ Rx Programming
Reactive Microservices Using C++
Advanced Streams and Handling Errors
Other Books You May Enjoy
Index
Customer Reviews