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Hands-On Design Patterns with Delphi

You're reading from   Hands-On Design Patterns with Delphi Build applications using idiomatic, extensible, and concurrent design patterns in Delphi

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Product type Paperback
Published in Feb 2019
Publisher Packt
ISBN-13 9781789343243
Length 476 pages
Edition 1st Edition
Languages
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Author (1):
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Primož Gabrijelčič Primož Gabrijelčič
Author Profile Icon Primož Gabrijelčič
Primož Gabrijelčič
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Toc

Table of Contents (19) Chapters Close

Preface 1. Section 1: Design Pattern Essentials FREE CHAPTER
2. Introduction to patterns 3. Section 2: Creational Patterns
4. Singleton, Dependency Injection, Lazy Initialization, and Object Pool 5. Factory Method, Abstract Factory, Prototype, and Builder 6. Section 3: Structural Patterns
7. Composite, Flyweight, Marker Interface, and Bridge 8. Adapter, Proxy, Decorator, and Facade 9. Section 4: Behavioral Patterns
10. Nullable Value, Template Method, Command, and State 11. Iterator, Visitor, Observer, and Memento 12. Section 5: Concurrency Patterns
13. Locking patterns 14. Thread pool, Messaging, Future and Pipeline 15. Section 6: Miscellaneous Patterns
16. Designing Delphi Programs 17. Other Kinds of Patterns 18. Other Books You May Enjoy

Thread pool, Messaging, Future and Pipeline

Multithreaded programming is complicated. I hope that the previous chapter has sufficiently demonstrated how hard it is to coordinate multiple threads that work on shared data. There are just so many possibilities for writing code that doesn't always work correctly or to implement a fix that slows a program down so much that the new and improved parallel solution is actually slower than the original single-threaded code.

In this chapter, I will continue exploring design patterns (with a bit of architectural thinking thrown in) in a completely different direction. Instead of working on shared data, the patterns from this chapter will be used to write parallel tasks that are independent of each other. To achieve that, they use multiple copies of data and communicate with messages.

Introducing such patterns, however, often requires...

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