Author: Damien Fuzeau

• Product Owner •Damien Fuzeau has joined the 4D Product team in February 2019. As a Product Owner, he is in charge of writing user stories, then translating them to functional specifications. His job also entails making sure that the feature implementations delivered are meeting the customer needs.Damien is graduated from the University of Nantes in software engineering. He spent more than 23 years in its former company, first as developer (discovering 4D in 1997), and later as engineering manager and software architect. This company is a 4D OEM partner and deployed 4D based business softwares for thousands users, on hundreds servers. So, Damien is used to 4D development and deployment in a multi-language context.
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Headless 4D applications

As a 4D developer, you may have already encountered a need to develop applications without a graphical user interface (GUI), otherwise known as a headless applications. Previously in 4D, this wasn’t entirely possible to do ….  until 4D v18! In this blog post, we’ll go through some of the newly available capabilities so you can make your applications “headless”!

Why create headless applications? There are several use cases such as simulating Windows behavior on macOS, or having the Windows service behavior without using the service manager, and so on. But above all, it opens new opportunities such as developing bots with 4D.

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Retrieve the current execution call chain

When programming an application, you may need to know where you are in your code, especially when one method calls other methods, which may then call other methods. That’s why it’s very helpful to see the chain of methods, or the call chain, during the debugging process. For this, 4D v17 R6 provides the new Get call chain command to give you an insight into the executed code. Now you won’t have to worry about getting lost anymore!

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Use ORDA to boost performance in Client/Server mode

Using ORDA to access large tables (especially those with relations) in Client/Server mode has been greatly enhanced. With 4D v17 R5, you’ll see 2-3xs improved LAN performance and up to 30xs faster WAN performance. And best of all – there’s no need to change anything in your code, it’s all automatic. Interesting, isn’t it? Well, let’s delve into the details.

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Better debug logs with these improvements

As a 4D developer, you may have already activated the debug log to troubleshoot problems. 4D v17 R5 introduces several improvements to help you analyze these files, such as logging only the current process and logging calls to member methods (collection or object methods).

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Who’s who? A new way to identify users

As a 4D developer you often need to manage end users with your own directory system. For internal users, you might create a few profiles with different rights or you might just use the default Designer account for everyone. The problem is when multiple people use the same profile, everyone has the same name and it’s difficult – sometime impossible – to differentiate them. Fortunately, 4D v17 R5 resolves the headache of trying to figure out who’s who. In this blog post, we’ll explain a new command and new selectors that’ll help you set the 4D user identity by defining a custom name to use instead of the current 4D user account name.