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From Jean-Baptiste Onofré ...@nanthrax.net>
Subject Re: Hello World!
Date Fri, 20 Sep 2019 08:44:54 GMT
It makes sense, and I agree with you, sometime users are lost to find
the right solution.
Karaf examples show a "panel" of what you can do, in different ways.

I would propose a full application, more "directive" in the approach
used, a bit as we did in Decanter (adopting SCR everywhere, etc).

A full stack application running in Karaf (as example) would be great,
probably not as part of the Karaf examples, but more a karaf-tutorial or
karaf-boot isolated repo (not necessary at Apache).


On 20/09/2019 09:55, Christian Schneider wrote:
> Don't get me wrong. The karaf examples are great and do a good job in
> showing all the features karaf has.
> The big issue though is that the examples show a lot of ways of doing the
> same thing. This is the right choice when it is about showing the features
> of karaf.
> It is not good as an introduction for how to create a streamlined
> application as it offers too many choices.
> What I have in mind is a very opinionated and structured documentation that
> concentrates on one solution for each of the parts of an application. It
> also has to show how it all fits together. This is very different from the
> goals of the karaf examples.
> I remember well the discussion we had about the karaf examples and about
> how opinionated they should be. I think you were right about being not very
> opinionated for karaf examples. It fits the idea of the platform.
> Christian
> Am Do., 19. Sept. 2019 um 15:43 Uhr schrieb Julian Feinauer <
> j.feinauer@pragmaticminds.de>:
>> Thanks Christian, I will check out your stuff later on. Ideally I would
>> love to have a book about karaf and some osgi basics and ds... But I guess
>> that's a lot of work.
>> So I think tutorials and examples are a good pragmatic compromise : )
>> ________________________________
>> From: Jean-Baptiste Onofré <jb@nanthrax.net>
>> Sent: Thursday, September 19, 2019 8:15:08 AM
>> To: dev@karaf.apache.org <dev@karaf.apache.org>
>> Subject: Re: Hello World!
>> Hi Christian,
>> I think Karaf examples are good enough to start. They are maybe too
>> simple but provide "classic" use cases (rest, service, jpa, etc).
>> I agree we can do more, and we are working on it. It's something I
>> discuss with some guys at ApacheCon last week.
>> I will come with concrete proposal soon ;)
>> Regards
>> JB
>> On 19/09/2019 15:02, Christian Schneider wrote:
>>> The problem with OSGi docs is that most of the material is quite old.
>>> Much of it does not apply to modern OSGi development anymore.
>>> Another issue is that especially for dependency injection there are
>> quite a
>>> few alternatives. Every of these come with their own pros and cons.
>>> As a beginner it is difficult to understand and decide how to start.
>>> Karaf is a great way to start playing with OSGi as many things are
>> readily
>>> available and the shell and webconsole allow some nice insight into the
>>> system. What karaf does not provide though is a good introduction into
>>> OSGi. I tried to do so with my tutorials but they are more like explained
>>> examples.
>>> I planned to do a longer introduction around how to build a typical
>>> application based on best practices .. but it is a lot of work and I
>> never
>>> really took on the task.
>>> You might be interested in my recent talk about OSGi best practices.
>>> Unfortunately in 30 minutes I was not able to really explain how to build
>>> an application but maybe the example helps a bit.
>>> https://adapt.to/2019/en/schedule/osgi-best-practices.html
>>> The most interesting part there is maybe how to build bundles without xml
>>> config.
>>> The new annotations that combine requirements and configs are also very
>>> interesting.
>>> Both of these are not yet covered by much material on the web.
>>> In the example there is a small application with an angular front end
>> and a
>>> jax-rs backend that can be easily installed in karaf.
>>> Christian
>>> Am Mi., 18. Sept. 2019 um 06:45 Uhr schrieb Julian Feinauer <
>>> j.feinauer@pragmaticminds.de>:
>>>> Hi,
>>>> it was not so much karaf (I kind of liked it from the start) it was
>> rather
>>>> OSGi.
>>>> We come from spring and when I looked through all the osgi material lots
>>>> of it seemed strange and confusing like Aries, Blueprint, DS, enRoute,
>> ... .
>>>> Serge helped me a lot with sorting the things in my head and getting all
>>>> clear (also with bundle vs. feature vs. feature-repo) and DS stuff and
>> lots
>>>> more.
>>>> So I think Karaf is already doing an excellent job its rather the OSGi
>>>> world that is damn confusing and one thing that probably could help is a
>>>> small OSGi introduction or something.
>>>> I hope that helps!
>>>> Julian
>>>> Am 16.09.19, 11:47 schrieb "Jean-Baptiste Onofré" <jb@nanthrax.net>:
>>>>     By the way, Julian, I'm curious. Why did you consider Karaf "hard
>> for
>>>>     you to adopt" ? It's to understand what we can improve (maybe
>>>>     message/website, example, whatever) in the project to change that !
>>>>     Thanks !
>>>>     Regards
>>>>     JB
>>>>     On 16/09/2019 18:21, Julian Feinauer wrote:
>>>>     > Hi everybody,
>>>>     >
>>>>     > my name is Julian and as I’m new on this list, I just wanted to
>>>> shortly introduce myself. I’m a contributor to some Apache projects
>> (PLC4X,
>>>> IoTDB, Calcite) and I met some karaf folks at the ApacheCon in Las
>> Vegas (I
>>>> was the guy hanging around introducing JB and Serge).
>>>>     > I have Karaf on my radar for quite some time but always considered
>>>> it to hard for us to adopt.
>>>>     >
>>>>     > But, as Serge gave me an awesome hands on introduction yesterday,
>> I
>>>> feel like we should really start to work with it and see how it goes.
>> So,
>>>> expect some mails from me here or on user@.
>>>>     >
>>>>     > Best
>>>>     > Julian
>>>>     >
>>>>     --
>>>>     Jean-Baptiste Onofré
>>>>     jbonofre@apache.org
>>>>     http://blog.nanthrax.net
>>>>     Talend - http://www.talend.com
>> --
>> Jean-Baptiste Onofré
>> jbonofre@apache.org
>> http://blog.nanthrax.net
>> Talend - http://www.talend.com

Jean-Baptiste Onofré
Talend - http://www.talend.com

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