Converting JBI projects to OSGI

[techy_bolek <te...@yahoo.com>]

I have a few old JBI legacy projects that I'd like to convert to OSGI. I have
a custom binding component, a few service units and a service assembly. I'm
new to OSGI and I'm looking for some guidelines where to start and how to
convert my JBO projects to OSGI. Thanks.




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Re: Converting JBI projects to OSGI

[Christian Schneider <ch...@die-schneider.net>]

Unfortunately there is no good guideline as far as I know.

I can give you a coarse idea what needs to be done.

1. If you use external libraries you have to make sure they can be 
deployed to OSGi. So first check if they already are bundles, next 
fallback would be to check if they exist in 
org.apache.servicemix.bundles in maven central. If they do not exist 
then you have to bundle them yourself which
can be easy or quite challenging depending on the lib.
I would first check each library for its operation in OSGi by using it 
from a simple bundle you write, without camel and the rest of the stack.
2. Next step is to move from JBI to camel. Most of your processing 
likely can be done in a camel route. Your binding component might be a 
good match for a custom camel component. If it is simple you might also 
be able to just use it as a processor.
3. Step is the deployment. You have to switch from the jbi packagings to 
a karaf feature file.

For most of the parts of the puzzle you need my karaf tutorials might be 
helpful.  See http://liquid-reality.de/display/liquid/Karaf+Tutorial
(especially the camel tutorial). I also have some feature files so you 
can see how to deploy your application.

In any case I suggest to get some consulting from an expert in this 
area. You might be able to do it alone but you will stumble into all the 
pitfalls.
On the servicemix page you can find a list of companies providing 
commercial support.
Talend (which I work for) is not listed there but we provide support for 
karaf + cxf + camel which effectively is the same as servicemix :-)

One thing you should keep in mind when migrating is that the new 
servicemix based on OSGi is much more than just JBI. It can be used as a 
platform for camel integration routes but also for more traditional java 
application programming. So before applying the camel hammer to every 
problem think if you can achieve the same with some lines of java code 
and and a OSGi or cxf service.

Christian

On 13.03.2014 22:44, techy_bolek wrote:
> I have a few old JBI legacy projects that I'd like to convert to OSGI. I have
> a custom binding component, a few service units and a service assembly. I'm
> new to OSGI and I'm looking for some guidelines where to start and how to
> convert my JBO projects to OSGI. Thanks.
>
>
>
>
> --
> View this message in context: http://servicemix.396122.n5.nabble.com/Converting-JBI-projects-to-OSGI-tp5719595.html
> Sent from the ServiceMix - User mailing list archive at Nabble.com.


-- 
Christian Schneider
http://www.liquid-reality.de

Open Source Architect
http://www.talend.com