Delphi Cookbook 2nd Edition was published by PacktPub at the end of June 2016. I’m very happy to see that in just 30 days, it has become a bestseller in its category.
So far, the book has sold 13 copies each day, which is a good figure for a tech book (it should increase in the following months because the book will be available in more stores).
Currently the book is available on all the big online stores.
PacktPub will be a sponsor of the upcoming ITDevCon in Rome (ITDevCon is the biggest Delphi Conference in Europe – www.itdevcon.it) and they have organized a nice offer for all the ITDevCon attendants!
If you are a Delphi developer (or you want to know why Delphi is so interesting now) you cannot miss ITDevCon 2016.
Moreover, since the 1st edition of ITDevCon we saw that a lot of programmers wants to be at ITDevCon because is a great conference full of practical contents (and with good italian food 🙂 ) but leaving the office for 2 days often can be a problem. So, starting by this year, you can buy also a single day of conference! So, if you cannot be with us for 2 days, check the timetable, and book the day most interesting for you!
Almost an year ago I started to write a book about Delphi for Packt Publishing. Today that book has been published.
This book is a cookbook! That’s it, in 328 pages you will find useful (I hope) “recipes” for your day-by-day Delphi job.
Topics of the book
Create visually stunning applications using FireMonkey
Effectively use LiveBindings with the right OOP approach
Create server-side programs to serve RESTful web services and provide data to your mobile apps
Develop mobile apps for Android and iOS using well-defined GUI design patterns for a great user experience
Build efficient mobile apps that read data from a remote server
Call the platform-native API on Android and iOS even for an unpublished API
Use extended RTTI to better manage the software customization for your customer
Leverage the most popular design patterns for a better design without wasting too much time debugging
It is not an introductory book, you will not find any “Introduction to the Object Pascal language”, however the majority of the chapters are not too complex and can be grasped also by the new Delphi programmers.
The book is available for sale on the editor website and on Amazon.
In 2009 I was looking for a fast, very fast, messaging system for a complex project and I meet ZeroMQ. At that time there was the 1.x version and I wrote a Delphi wrapper for the C dll that some days later has been included in the official ZeroMQ distribution.
Yes, this book is really a crash course in ZeroMQ. In about 100 pages, this “small but full of interesting things” book, explains all the most useful message patterns implemented in ZeroMQ. Congrats to Faruk Akgul (the author).
Traditional message queuing systems use a broker. However, ZeroMQ is brokerless. In a brokerless design, applications can directly communicate with each other without any broker in the middle. All the complexity is hidden, and handled, by ZeroMQ. In this situation there isn’t the “single point of failure”. In some cases this architecture cannot be used, but when it can be, you can gain a lot of flexibility, speed with no added complexity.
Let’s give a more deeper overview for each chapter.
Chapter 1: Getting Started
In this chapter there are some informations about the messaging architectures in general (good for newcomers to the topic) and about ZeroMQ messaging (in particular). Some concepts introduced in this chapter are reused a lot in the rest of the book.
In chapter 1 is introduced the first and the simpler ZeroMQ pattern, the request-replay.
Chapter 2: Introduction to Socket
This chapter starts with a nice introduction to the publish-subscribe pattern and the related filtering (ZeroMQ can filter messages with a very simple “match” pattern). Then, the chapter talks about one of the most interesting patterns when speed is important: the pipeline pattern. While is talking about the pipeline, it explain the ZMQ_PULL and the ZMQ_PUSH socket types. At the end of the chapter, there is an introduction to the Valgrind’s tools suite to detect memory leaks in C/C++ programs. In Delphi can be used FastMM or other similar tools for the same thing.
Chapter 3: Using Socket Topology
In this chapter there is a small introduction to the types of Internet Sockets and TCP. There there is a nice comparison between the “plain” sockets and the ZeroMQ sockets.
At the end, there is an introduction to the CZMQ, a small helper library which lets
C developers to code their ZeroMQ applications easier and shorter. For a Delphi programmer there are a number of ZeroMQ wrapper that makes its use really a snap.
Chapter 4: Advanced Patterns
In this last chapter, are introduced some advanced variation of the previously introduced patterns. Then, there is a nice explanation of some critical situations that could happened in a messaging system. To help the programmer to handle this cases there a number of examples of the ZeroMQ “High Watermark” setting. As very last topic, there is a well known problem, the infamous “slow subscribers in a publish-subscribe pattern”.
As in every single thing, there are good aspects and bad aspects.
This book is good for an introduction but is not so good for advanced users. There are some other ZeroMQ patterns and features that are not explained at all. However, these patterns are not the most used, or are advanced stuff, so this could not be a big issue.
Considering, the price, the contents and the informative density, is a definitely a good book that can be read, and studied, in few hours and could change your way to do things in everyday programming (messaging are very often not used, or used in a bad way, simply because usually is complex to write and maintain a good messaging system).
One of the more nice features about ZeroMQ is that it can use different transportation protocols. The same library and the same code can be used to do messaging between machines, between processes or between threads in the same process (ipc). As last note, ZeroMQ can handle, without much effort, millions of messages per seconds. If you need speed… consider this.
P.S. I’ll translate and publish on this blog, some of the C examples contained in the book, in Delphi. Stay tuned.