[jira] Created: (DOSGI-73) OSGi Declarative Service-based consumer does not register proxy service on demand

["David Bosschaert (JIRA)" <ji...@apache.org>]

OSGi Declarative Service-based consumer does not register proxy service on demand
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                 Key: DOSGI-73
                 URL: https://issues.apache.org/jira/browse/DOSGI-73
             Project: CXF Distributed OSGi
          Issue Type: Bug
          Components: DSW
    Affects Versions: 1.2
         Environment: Equinox 3.6 with DS
            Reporter: David Bosschaert


When using OSGi Declarative Services (DS) you can express interest in an OSGi service through an XML descriptor, like this one (from the samples/ds demo):
{code:xml}<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="DS Consumer Sample" activate="start">
   <implementation class="org.apache.cxf.dosgi.samples.ds.consumer.AdderConsumer"/>
   <reference interface="org.apache.cxf.dosgi.samples.ds.AdderService" name="AdderService" cardinality="1..1" policy="dynamic" bind="bindAdder" unbind="unbindAdder"/>
</scr:component>{code}
The declarative services implementation will then inject your service into your component.

With CXF-DOSGi a remote service is always registered on-the-fly when a service is requested. This is done through a ListenerHook. The listenerhook gets called with the filter of services that are looked up by a consumer, e.g. what the consumer passed in to a ServiceTracker.

It seems like the DS implementation uses a single tracker or listener for all the services it's interested in, which probably uses an empty filter. This is currently ignored by the CXF-DOSGi listener hook implementation, which means that the AdderService proxy is not automatically injected in the component.

There is a workaround. Simply create a bundle (any bundle) in the consumer that registers a service tracker to listen for the service that you want to be discovered remotely.

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