Vaadin front-end for social network? [closed] - spring-boot

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From the information I've gathered, Vaadin seems best suited for business related applications.
I'm just wondering if anyone with experience could tell me if it would be possible to create Facebook 2.0 with Vaadin? It seems like a really good front-end for such a thing and I see many possibilities for amazing user experiences.
(That's not what I'm aiming to do, just trying to make the question more concrete)
Note that I'm a beginner and currently developing using Thymeleaf as my template engine.

I would not recommend Vaadin as a technology for realizing a social network. Vaadin is a server-side UI framework that stores the UI state in the session. With thousands of concurrently active users you have a massive memory consumption on the server. I would rather use a fat-client approach with client-side technologies such as angularJS.

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Good and easy-to-use XACML GUI editor? [closed]

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I have need to do the authorization for my web service. And I want to design some XACML policies to do the job. But they are a little complicated for me (forgive me that I'm a newbee to security policy). I feel I have the need to have a GUI editor to help me do the design. But I haven't found a good GUI editor except UMU-XACML-Editor, which is no longer actively developed currently.
In my humble opinion, a XACML PDP server maybe too heavy for me. I just want to have a GUI policy editor, maybe a desktop software or a web-based UI. Is there a tool like this?
There are several tools, editors, and PDPs available:
Axiomatics Policy Server (YouTube demo) contains both a web-based ui and a desktop client.
the ALFA plugin for Eclipse
AT&T XACML

Auto Face Tagging Library [closed]

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I am looking for library which can auto tag persons on a photo. The features is similar to Facebook, Picasa or iPhoto tagging function. Preferably it's able to run on Linux server, callable through PHP and Python. Any recommendation? Thanks.
With regard to what you're looking for, you probably aren't going to find anything that you can host on your own server. Rather, most companies will offer an API to which you can send requests, and you will be charged base don how much you use the API. In no particular order, here are several resources you might consider using.
https://lambdal.com/face-recognition-api - They have low priced entry options, and they are well-suited to detecting and recognizing new faces.
http://www.alchemyapi.com/products/alchemyvision/face-detection - This is more geared to recognizing famous or well-know people.

Best web app programming platform/ language for someone used to Xcode [closed]

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I have learnt to program apps in Xcode and like the environment, especially the interface builder. I want to learn how to code web apps but don't seem to be able to find any similar platform, everything seems to be pretty much purely code based. Any help on where to start?
Thanks
You DO NOT want to work with any web app framework that includes an Interface builder. You will get a WYSIWYG mess of code that will be impossible to work with.
You DO want to adopt a web app framework, which makes deploying a web app fast and intuitive. Ruby on Rails is one of the most popular.
Then integrate that that framework with Bootstrap which makes CSS styling a breeze.
http://getbootstrap.com
This would be my recommendation;
1. Pick any framework like Rails(ruby), flask(Python), play!(Java), etc.
2. Learn how to integrate that framework with Bootstrap. If you choose Rails I recommend this tutorial, which teaches you how to integrate bootstrap: https://www.railstutorial.org/book/beginning

Exemplary open-source Spring projects [closed]

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I am new to the Spring Framework. With Spring Core course recently taken, what would be some good example projects to download and learn good design from?
Perfect would be a well designed project, small enough to read through and understand, big enough to have a structure that can scale well.
Spring ships with a very comprehensive example application called PetClinic. It was originally inspired by the PetStore J2EE example application, demonstrating just how much easier things were in Spring.
This is intended to represent "best practice" for Spring development. You can find it in the distribution package.
Spring distribution has the samples which are very good to start with. The petclinic application is where I start with.

Where are good examples of Web applications built for skilled and intense use? [closed]

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I have spent most of my development career writing backend code, or front-end apps for used as daily business tools, by at least semi-skilled staff, e.g. order-tracking, sales capture, etc. That those I helped build peformed their tasks well is comfort enough, but I am still seeking excellence in the building of these kind of apps, versus the trendy emphasis on more personal relationships with the UI.
Can anyone recommend reading on this type of application (LOB?) on the web today? Any available examples to study?
I suggest that you read Don't Make me Think. Don't think that engaging UIs are not efficient. I would suggest the opposite.
Actually this answer has many useful links.

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