JCR Apps and Exchangable

[Frans Thamura <fl...@meruvian.com>]

Hi All,

I just comparing several of JCR tech and use it in my company for case study

1. Liferay -> www.meruvian.com
2. Alfresco --> www.meruvian.com/mspace
3. Magnolia --> www.intercitra.com

I just finding a way, which one is the "real" JCR, because in my opinion 
any JCR apps can move the data from one JCR to another JCR, or merging 
all the JCR apps to share the same JCR repo.

my problem
1. I just try to save my Magnolia data, and make another CMS that can 
read Magnolia data, because I find that Magnolia dont have feature to 
show the content in sort by date which for me it is a basic feature for 
CMS, and to make a module on top of Magnolia, I still cannot get the guide.

2. alfresco, I want to implement several digital library based on 
Alfresco, but I see that to develop a module i need to learn to develop 
aspect, need to learn more, but in the spirit of JCR, I want to develop 
a simple JCR apps using Jackrabbit, and try to move. I find difficulty, 
because my Jackrabbit View is still cannot work in alfresco 's  JCR

my question is, how to make test that my apps can be moveable from one 
JCR ot another JCR apps, it is possible

i got that Jackrabbit have XML feature, to import and export, but anyone 
have try another apps?





it is possible?

Re: JCR Apps and Exchangable

[Frans Thamura <fl...@meruvian.com>]

Nicolas Modrzyk wrote:
> you can always access the data in the JCR for sure, and in most cases 
> only reading the data would cause no problem.
> It is a matter of how you display the data onto your new (his) 
> application.
>
> Unless the application is written to access flexible data format, (has 
> been written in this way) that would not work. Same is true when 
> working with different SQL databases.
>
> Try migrating the data from one wiki server to another one... they 
> could even use the same SQL server but I don't think it would be easy.
> Thousands of consultants are making money just by migrating systems 
> from one data format to another (new?) one.
>
yah right, that will be wonderfull if wiki syntax is standarized, and 
JCR as the engine, so we can move from confulence to jspwiki, is it 
possible?

because i just want to develop a system based on dublincore, which the 
database can move (done using dbunit), but i want to move also the repo, 
i choose JCR.

so, if we know the schema of my sistem, db + jcr content, i think the 
system can be moveable,

i think this is the spirit of JCR

Frans

Re: JCR Apps and Exchangable

[Nicolas Modrzyk <ni...@macnica.com>]

you can always access the data in the JCR for sure, and in most cases  
only reading the data would cause no problem.
It is a matter of how you display the data onto your new (his)  
application.

Unless the application is written to access flexible data format,  
(has been written in this way) that would not work. Same is true when  
working with different SQL databases.

Try migrating the data from one wiki server to another one... they  
could even use the same SQL server but I don't think it would be easy.
Thousands of consultants are making money just by migrating systems  
from one data format to another (new?) one.

Regards,

Niko

> i did become a speaker in digital library system, and most of our  
> digital library here using PHP,
>
> i think i will develop a small digital library system using  
> jackrabbit, but i want to prove to the people, if you using JCR,  
> and dont want to use my apps, still can migrate from my apps to his  
> apps.
>
> that is my opinion

Re: JCR Apps and Exchangable

[Frans Thamura <fl...@meruvian.com>]

Nicolas Modrzyk wrote:
>
> I don't understand your problem on sorting by dates, this is just a 
> simple query on the jcr, and any of the CMS can do that (magnolia 
> included).
>
i did become a speaker in digital library system, and most of our 
digital library here using PHP,

i think i will develop a small digital library system using jackrabbit, 
but i want to prove to the people, if you using JCR, and dont want to 
use my apps, still can migrate from my apps to his apps.

that is my opinion

Re: JCR Apps and Exchangable

[Nicolas Modrzyk <ni...@macnica.com>]

Hi Frans,

Your question is a bit like asking how to I move my application from  
postgresql to mysql given that both postgres and mysql are using SQL  
as a language to access the data.
You even have tools to import/export data in both of them.

As a short answer, you can't. Most of the cms have custom nodes that  
can be read but surely cannot be shown or handled properly by other CMS.

> 1. I just try to save my Magnolia data, and make another CMS that  
> can read Magnolia data, because I find that Magnolia dont have  
> feature to show the content in sort by date which for me it is a  
> basic feature for CMS, and to make a module on top of Magnolia, I  
> still cannot get the guide.

I am crossposting to the user of magnolia. To create a module for it,  
you basically copy and paste an other module and start creating your  
own. The guys are busy with a industrial production-ready 3.0  
version, so the documentation is still a bit behind.

I don't understand your problem on sorting by dates, this is just a  
simple query on the jcr, and any of the CMS can do that (magnolia  
included).

Hope I have, to some extend, answered your question. Do not hesitate  
to ask more on the project's user list.

Regards,

Nicolas,