How to expose the spring couchbase template as OSGI service

Question

Had one more question regarding the Spring-data-couchbase and OSGI.

I want to have different persistence bundles based on the functionality but I would like to have a common bundle while provides me the connection to couchbase. If I want to scan for the repositories from a different bundle, I have to pass the template-ref object to it.

<couchbase:repositories base-package="xyz.abc.model"
 couchbase-template-ref="cb-template-first">
</couchbase:repositories>

The template is created in the way as shown below as per the examples

<couchbase:template id="cb-template-first"
     client-ref="cb-first" />

Basically, I wanted to know is there a way to expose the template as an OSGI Service, so that this service can be referenced in my other bundle.

Please provide more information about your environment, are you using blueprint or felix scr? Or just OSGi only? — Martin Baumgartner, Apr 11 '14 at 10:32
We are using just OSGI. We have Apache Karaf OSGI container, on top of OSGI, we installed spring, cxf, couchbase, etc... bundles. couchbase-spring-data which is release recently has a concept called template, and wanted to know how to provide template as service is OSGI as explained above. — Srikanth Hugar, Apr 14 '14 at 06:46

score 0 · Answer 1 · answered Apr 14 '14 at 07:35

If you use just "OSGi" as mentioned in your comment, you have a bundle activator class which initializes your context. In this case your activator would look like this:

public class Activator implements BundleActivator
{
   @Override
   public void start( BundleContext context ) throws Exception
   {
     // start spring application context 
     // template-interface = application context get bean 
      context.registerService( template-interface.class.getName(), template-interface, null );

   }
}

But if you want to build an OSGi application based on spring i would recommend to use gemini blueprint to remove boilerplate code. Gemini Blueprint is an extensions which scans all started bundles for context-files inside of META-INF/spring and starts them automatically. Due to namespace-support of gemini blueprint, you can publish or fetch a service within your context:

 <osgi:service id="simpleServiceOsgi" ref="simpleService" interface="org.xyz.MyService" />
 <osgi:reference id="messageService" interface="com.xyz.MessageService"/>

How to expose the spring couchbase template as OSGI service

1 Answers1