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I believe there are a lot of similar questions even on stackoverflow. But most of them are dated 1-2 years ago. Sorry about same question again.
Could you suggest easy to run and tweak java based opensource E-Commerce solution. Before i used Magento, but it was really hard to change code at start. I spend almost 2 week to realize how Magento works. Performance was not good enough too.
Now i'm looking for simple java solution, which can be customized or rewritten easy.
I'm on the hunt for more or less the same.
Up until now, KonaKart has been my prime candidate. But their entire stack isn't opensource, this is limited to (snippet from http://www.konakart.com/product/customization):
The parts of KonaKart that customers are most likely to want to customize are all open >source. These include the Struts action classes and forms, the JSPs, the velocity templates, >the BIRT reports, the payment modules, order total modules, shipping modules and the GWT One >Page Checkout code. They are shipped under the GNU Lesser General Public License
An alternative is http://www.shopizer.com/ which offer the entire codebase under the LGPL license.
Since I'm purely in the very early stages of spotting a suitable system, I can't say much about performance of either system.
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I have pretty standard java project with standard gradle layout, all sources are stored in git. I want to write documentation in markdown (or similar markup language) and keep all files in project directory (e.g. docs/ folder in the root). Then I want to generate static site or push my sources somewhere to have access to full documentation in html (should be self-hosted solution).
It will be good if I'm able to add simple link to other articles (like I do it in any wiki engine by using [[article]]). And It would be perfect if I've been able to add quick links to javadoc by the same technique as link to articles. And also it would be perfect if it has had built-in search engine.
I've gone through couple of static site generators but I didn't find anything which can satisfy my requirements at least half. Is there something like that? Or I need to code it by myself (I know it won't take to much time)? Maybe there's more common use case for documentation?
You have to use the concept of Doclets. There are some out there. Maybe just try this one:
https://github.com/Abnaxos/pegdown-doclet
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I have recently been tasked to working on code that uses Java CUP. Does anybody still use it? I've found a couple small resources on it, but it looks like there isn't much documentation on the main site, Java Cup Website. If there are any mailing-lists or users out there I would like to know. BTW, I can't use the new engine that is being maintained by the people in Munich, I got to stick with version 0.1.
We use the newer one on the Eclipse XPath2 engine (disturbingly called PsychoPath).
CUP gets the job done, but we use the newer one.
Being a small piece of software, it's easier to understand, which makes up for the scarceness of resources.
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Consider the requirements for embedding help in a Java desktop application (or applet):
Single source for content (such as AsciiDoc) to generate high quality PDF manuals1
Hooks for context-sensitive help
Robust, simple, and well documented API (under an hour to learn)
Small footprint (a sub-100K Java archive)2
Integrate as a docked MDI-style window, or a separate window
Free open source software
Google says:
JavaHelp
Java Programming Help
Help Authoring Tools
Which of these, or any others, would you recommend?
1Storing the content in AsciiDoc format would be ideal, so long as conversion is trivial.
2Up to 500kb.
Have a look at DocBook - last time I looked it could generate PDF, HTML and JavaHelp from files written in DocBook XML .
A crash course is available at: http://opensource.bureau-cornavin.com/crash-course/
Definitely Asciidoc, or its more recent cousin AsciiDoctor.
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Is there any existing open source CMS in stripes?
I'm especially looking for a very tiny and lightweight one that I can take a look at and learn from.
Unfortunately, I've been unable to find a lightweight CMS in any language.
Java has the JSR 170 Java Content Repository specification, with Jackrabbit being the reference impelementation. Unfortunately, my experience has been that it is neither lightweight nor easy to learn from.
You might try looking at some of the version control systems and filesystems though: their functionality is overlapping and may resemble yours.
Have a look to http://wiki.opensymphony.com/display/ABLE/Home, it use Stripes and other tools.
Is not a pure CMS but a framework for building CRUD applications and auto-generating controllers and scaffolding.
Unless you really have to learn something a little more modern. Stripes is just a better Struts which isnt much. Both are dated and do next to nothing in terms of building something snazzy.
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Does anyone know or has experience with a pure Java library to select portfolios or do some similar kinds of quadratic programming with constraints?
There seems to be a lot of tools, as already discussed elsewhere - but what I would like to use is a pure Java implementation. Since I want to call the library from within another open-source software with a BSD-ish license I would prefer LGPL over GPL.
Any help is appreciated. If you don't know such libraries, which is the most simple algorithm you would suggest to implement? It has to cope with an inequality constraint (all x_i >= 0) and an equality constraint (sum of all x_i = 1).
Try ojAlgo. This is FOSS with a business friendly licence.
I think WebCab Portfolio may help you. It will handle Markowitz models, efficient frontiers etc. Is that the sort of thing you're addressing above ?
Unfortunately the licensing may cause you problems (but it's runtime-royalty-free, which may be of use)