opensource websites backend in java [closed] - java

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Are there any opensource websites backend in java?
Just like reddit in python, and openstreet in ruby.

So, you're looking for a Java open source CMS (Content Management System)?
You can find here an overview of the most of them: Open Source CMS in Java. Wikipedia also has an overview of some of them: List of CMS in Java.
The popular ones are Alfresco, Nuxeo and Liferay. You can compare the detailed features on the CMS Matrix site.

ThingLink is a finnish service with a custom build Java backend. The backend code is hosted on SourceForge.

Do you mean web frameworks? If so there are loads: http://java-source.net/open-source/web-frameworks
Edit: Tapestry 5 is great.

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How to get started with Flex and Java [closed]

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I want to learn Flex. I have some knowledge on Java Enterprise Edition, so the server side scripting is not very hard for me. But for Flex I am kind of lost. Unable to understand where to start. I am reading this Flex Tutorial. The IDE for Flash development is the Flash Builder. Also another SO thread says there is a free version of this software, but I guess the Flash Builder 4.7 Student edition is not free any more. I came to know that Eclipse has a Flex development plugin, but I don't know that, that plugin will serve the purpose.
It would very appreciative if someone give me pointers on the following topics.
Where to start on Flex 4,
Which IDE to use,
How to integrate with Web Service/EJB
Thanks in advance.
Where to start on Flex 4 :
Adobe website is the best place, here are few useful links:
http://livedocs.adobe.com/flex/gumbo/flex_4_tutorials.pdf
http://www.adobe.com/devnet/flex/videotraining.html
http://www.adobe.com/devnet/flex.html
Apart from learning the basics of flex it will be good to learn the mvc frameworks used in flex, such as Caringorm and PureMVC
Which IDE to use: Adobe Flex Builder, they provide 60 day trial license, good enough to learn.
How to integrate with Web Service/EJB : There is something called HttpService in flex using which you can integrate with web services.

jboss downloaded but where could I start to make work [closed]

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well I studied java language and I'm pretty sure I'm at a good point and I would move up to the next level beginning to build a web app. So I downloaded and installed jboss but I think although is a complete framework it's very complicated.so I ask you where couid I start?which could the beginning point to understand something and move on?
JBoss is only one of several web application containers available in the Java ecosystem. If I were you I'd start by looking at how to develop web components using servlets and jsp. Basically the things included in the Oracle Web Component Developer Certification. While it's certainly not necessary to get a certification it is good to have a grasp of the material covered. There are plenty of books and online resources that cover these topics.

Latest technologies in java [closed]

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I'm have an experience of 2+ in java development. I worked on corejava,toplink(db framework),sql.
I have knowledge on servlets,jsp and struts.
I would like to move to another company. What are the latest emerging technologies in java??
A master is a master not because of his knowledge of the additional elements in his field; but, because of his skill in handling the core fundamentals. All additional elements in a field stem from the fundamentals.
I am getting into java as well. From what I have gleaned you should be well versed with the Spring Framework and Hibernate or other comparable tools (Google for alternatives). They aren't the "latest", but people will expect you to know them well.

java web crawler [closed]

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hi can anyone recommend a simple java web crawler that crawls a websites and return a list of links in the website ? No, i do not need a parser. Thanks for your attention.
A web crawler is (almost by definition) never 'simple'.
Two names spring to mind however (although both have a learning curve):
Nutch
Heritrix
Both are open source and can accomplish what you want, although simply listing the links in a website is not what either is built for (Nutch is designed to build a search index and Heritrix is designed to archive websites). You will need to do some custom configurations to accomplish your task.
HTTrack is a much simpler tool, but is not implemented in Java.

Moodle with Java Or any other LMS that fits this requirement [closed]

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My requirement is to access moodle as a backend engine and front end will be mint in Java[jsf]
now I want to know that is there any interface available to access Moodle from Java , using WebServices or any APIs or anything.
Initially I tried using Sakai which is in Java, but the problem is there is no clear API written for it.
So let me know the option for using Moodle from JAVA.
Also if it is possible than what will be the feature available through the WebServices or API. ?
Or any other LMS that is in Java and provide API or WebService to make this working.
I reviewed many LMS (dokeos, docebo, ATutor) last year and to be frank all of them sucked. Moodle was the most stable, had more plugins and a huge community.
I came across Project Sakai, I havn't tried it, but sounds promising. Something very interesting from Google is cloudcourse (in python I guess, but looks awesome demo). But not a complete LMS (compared to moodle).
You forgot to add Chamilo they have a list of available web services (SOAP) that you can use to create courses, users, add users to courses, etc
https://www.olat.org/ and https://www.openolat.com seem a good alternative to moodle.

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