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The greeter demo can be found in the samples/greeter directory of the SVN code base and implements a simple OSGi Greeter Service and a consumer to that service with a trivial UI.
In this walkthrough all the required bundles are installed straight from the maven release repository, so no need to check out SVN and build anything to get started with the Greeter Demo.

NOTE: this demo requires CXF/DOSGi 1.1

The Greeter demo design

The demo is composed of 3 bundles:

...

Code Block
C:\felix-framework-3.0.1>

Welcome to Apache Felix Gogo
g! install http://repo1.maven.org/maven2/org/osgi/org.osgi.compendium/4.2.0/org.osgi.compendium-4.2.0.jar
g! start http://www.apache.org/dist/cxf/dosgi/1.12/cxf-dosgi-ri-singlebundle-distribution-1.12.jar
... some log messages may appear...
g! lb
    0|Active     |    0|org.apache.felix.framework (3.0.1)
    1|Active     |    1|org.apache.felix.bundlerepository (1.6.2)
    2|Active     |    1|org.apache.felix.gogo.command (0.6.0)
    3|Active     |    1|org.apache.felix.gogo.runtime (0.6.0)
    4|Active     |    1|org.apache.felix.gogo.shell (0.6.0)
    5|Resolved   |    1|osgi.cmpn (4.2.0.200908310645)
    6|Active     |    1|cxf-dosgi-ri-singlebundle-distribution (1.2.0)

...

Code Block
g! start http://repo1.maven.org/maven2/org/apache/cxf/dosgi/samples/cxf-dosgi-ri-samples-greeter-interface/1.12/cxf-dosgi-ri-samples-greeter-interface-1.12.jar
g! start http://repo1.maven.org/maven2/org/apache/cxf/dosgi/samples/cxf-dosgi-ri-samples-greeter-impl/1.12/cxf-dosgi-ri-samples-greeter-impl-1.12.jar
... some log messages will appear ...
g! lb
START LEVEL 1
   ID|State      |Level|Name
    0|Active     |    0|System Bundle (3.0.1)
    1|Active     |    1|Apache Felix Bundle Repository (1.6.2)
    2|Active     |    1|Apache Felix Gogo Command (0.6.0)
    3|Active     |    1|Apache Felix Gogo Runtime (0.6.0)
    4|Active     |    1|Apache Felix Gogo Shell (0.6.0)
    5|Resolved   |    1|osgi.cmpn (4.2.0.200908310645)
    6|Active     |    1|Distributed OSGi Distribution Software Single-Bundle Distribution
    7|Active     |    1|CXF Distributed OSGi Greeter Demo Interface Bundle
    8|Active     |    1|CXF Distributed OSGi Greeter Demo Service Implementation Bundle

At the end of the log messages you will see one appear that says:
INFO: TopologyManager: export sucessful Endpoints: [ Endpoint Desctiption Description for ServiceReference [org.apache.cxf.dosgi.samples.greeter.GreeterService]
This means that the service is successfully exposed remotely, and you can verify this by requesting the WSDL:

...

So the remote service is simply looked up the normal way, via the OSGi Service Registry.
How does it get there? The fact that a lookup on a service is done internally triggers a Service Registry Hook. This will go out to any registered Distributed OSGi Discovery implementations and query them for any matching services.
However, in our setup we haven't yet registered a Discovery implementation. There is an alternative, more static way to provide discovery type information, in case this info is not available via discovery. It can be specified in a OSGI-INF/remote-service/*.xml file. This the content of the Greeter Service Consumer remote-services.xml file:

Code Block
xml
xml
<endpoint<service-descriptions xmlns="http://www.osgi.org/xmlns/sdrsa/v1.0.0">
  <service<endpoint-description>
    <provide<property interfacename="orgobjectClass">
      <array>
        <value>org.apache.cxf.dosgi.samples.greeter.GreeterService"GreeterService</>value>
    <property name="service.exported.interfaces">*  </array>
    </property>
    <property name="serviceendpoint.exported.configs">org.apache.cxf.ws<id">http://localhost:9090/greeter</property>
    <property name="orgservice.imported.configs">org.apache.cxf.ws.address">http://localhost:9090/greeter</ws</property>
  </serviceendpoint-description>
</serviceendpoint-descriptions>

Let's run the consumer in Equinox, so that we have the bundles running in Equinox talking to a remoted service running in Felix!
As with Felix, we will have to load the bundle with the OSGi compendium interfaces. There's one that ships with Equinox.

Code Block
/eclipse> java -jar plugins/org.eclipse.osgi_3.56.0.v20090520v20100517.jar -configuration conf -console
osgi> install install file:plugins/org.eclipse.osgi.services_3.2.0100.v20090520-1800v20100503.jar
Bundle id is 1
osgi> start 1

osgi> install http://www.apache.org/dist/cxf/dosgi/1.12/cxf-dosgi-ri-singlebundle-distribution-1.12.jar
Bundle id is 2

osgi> start 2
... some log messages may appear...

Some logging messages may appear. You can also automatically load the DOSGi bundles by appending the target/equinox.config.ini.append to you equinox config.ini file.

Code Block
osgi> install http://repo1.maven.org/maven2/org/apache/cxf/dosgi/samples/cxf-dosgi-ri-samples-greeter-interface/1.12/cxf-dosgi-ri-samples-greeter-interface-1.12.jar
Bundle id is 3
osgi> install http://repo1.maven.org/maven2/org/apache/cxf/dosgi/samples/cxf-dosgi-ri-samples-greeter-client/1.12/cxf-dosgi-ri-samples-greeter-client-1.12.jar
Bundle id is 4
osgi> ss

Framework is launched.

id      State       Bundle
0       ACTIVE      org.eclipse.osgi_3.56.0.v20081201-1815v20100517
1       ACTIVERESOLVED      org.eclipse.osgi.services_3.2.0100.v20081205-1800v20100503
2       ACTIVE      cxf-dosgi-ri-singlebundle-distribution
3       INSTALLED   cxf-dosgi-ri-samples-greeter-interface
4       INSTALLED   cxf-dosgi-ri-samples-greeter-client

osgi> start 4

...