Okay, here are the relevant java files of my two projects. Maybe I explain I
little bit how the classes work together:
Within my 'host-project' I'm using the functionality of the felix.jar to
create a OSGi instance (OSGiFramework.java). Within the initialize() method
I'm creating a new instance of HostAcitvator (HostActivator.java), which
implements the service interface Lookup (Lookup.java) like in the example on
the wiki. Within my bundle I try to access this Lookup service
(Activator.java). To be able to access the Lookup service interface I added
the whole 'host-project' to the build path of the equinox bundle project. If
I try to export that bundle using the build-in bundle export function I'm
getting the error.
BR,
Markus
2009/6/10 Ted Stockwell <[email protected]>
>
> How about posting the projects so I can try them?
>
>
>
> --- On Tue, 6/9/09, Markus Michel <[email protected]> wrote:
>
> > From: Markus Michel <[email protected]>
> > Subject: Embedded Felix: Using a service provided by the host from a
> bundle
> > To: [email protected]
> > Date: Tuesday, June 9, 2009, 11:52 AM
> > Hi there,
> >
> > after reading the wiki entry (
> >
> http://felix.apache.org/site/apache-felix-framework-launching-and-embedding.html#ApacheFelixFrameworkLaunchingandEmbedding-hostservices
> )
> > I tried to integrate the presented example
> > into my existing code. Within my Eclipse workspace I have
> > the following
> > projects:
> >
> > Host Project, which uses the functionality of the felix.jar
> > to create an
> > OSGi instance and implements the Lookup service
> >
> > Equinox Hello World bundle which tries to use the Lookup
> > service (To get
> > access to the service implementation I added the Host
> > Project as an required
> > project to the build path)
> >
> > If I try to export the bundle to a jar file I'm getting the
> > following errors
> > within a zipped log file:
> >
> > # 09.06.09 18:34:17 MESZ
> > # Eclipse Java Compiler 0.894_R34x, 3.4.2 release,
> > Copyright IBM Corp 2000,
> > 2008. All rights reserved.
> > ----------
> > 1. ERROR in
> >
> /home/markus/master/michel/masterthesis/eclipseWorkspace/TestBundle/src/bla/Activator.java
> > (at line 13)
> > ServiceReference serviceReference =
> > context.getServiceReference(CanEmulator.Lookup.class.getName());
> >
> > ^^^^^^^^^^^
> > CanEmulator cannot be resolved to a type
> > ----------
> > 2. ERROR in
> >
> /home/markus/master/michel/masterthesis/eclipseWorkspace/TestBundle/src/bla/Activator.java
> > (at line 17)
> > CanEmulator.Lookup lookup =
> > (CanEmulator.Lookup)
> > context.getService(serviceReference);
> > ^^^^^^^^^^^
> > CanEmulator cannot be resolved to a type
> > ----------
> > 3. ERROR in
> >
> /home/markus/master/michel/masterthesis/eclipseWorkspace/TestBundle/src/bla/Activator.java
> > (at line 17)
> > CanEmulator.Lookup lookup =
> > (CanEmulator.Lookup)
> > context.getService(serviceReference);
> >
> >
> > ^^^^^^^^^^^
> > CanEmulator cannot be resolved
> > ----------
> > 3 problems (3 errors)
> >
> > It seems like the bundle doesn't find the referenced
> > project. Does anybody
> > has an idea how to solve my problem? Do I have to add
> > something to the
> > mainfest file? (I tried to add my project to the bundle
> > import path, but I
> > couldn't find it in the list, because the host project
> > isn't a plugin
> > project)
> >
> > BR,
> >
> > Markus
> >
>
>
>
>
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>
>
package bla;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import CanEmulator.Lookup;
public class Activator implements BundleActivator
{
public void start(BundleContext context) throws Exception
{
System.out.println("Hello World!!");
ServiceReference serviceReference = context.getServiceReference(Lookup.class.getName());
if (serviceReference != null)
{
Lookup lookup = (Lookup) context.getService(serviceReference);
if (lookup != null)
{
System.out.println(lookup.lookup("name1"));
}
}
else
{
System.out.println("Service Reference is null!");
}
// serviceReference = context.getServiceReference(HelloService.class.getName());
//
// if (serviceReference != null)
// {
// HelloService helloService = (HelloService) context.getService(serviceReference);
//
// if (helloService != null)
// {
// helloService.speak();
// }
// }
}
public void stop(BundleContext context) throws Exception
{
System.out.println("Goodbye World!!");
}
}
package CanEmulator;
import java.util.Map;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
public class HostActivator implements BundleActivator
{
private Map m_lookupMap = null;
private BundleContext m_context = null;
private ServiceRegistration m_registration = null;
public HostActivator(Map lookupMap)
{
// Save a reference to the service's backing store.
m_lookupMap = lookupMap;
}
public void start(BundleContext context)
{
// Save a reference to the bundle context.
m_context = context;
// Create a property lookup service implementation.
Lookup lookup = new Lookup()
{
@Override
public Object lookup(String name)
{
return m_lookupMap.get(name);
}
};
// Register the property lookup service and save
// the service registration.
m_registration = m_context.registerService(Lookup.class.getName(), lookup, null);
}
public void stop(BundleContext context)
{
// Unregister the property lookup service.
m_registration.unregister();
m_context = null;
}
}
package CanEmulator;
public interface Lookup
{
public Object lookup(String name);
}
package CanEmulator;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.felix.framework.Felix;
import org.apache.felix.framework.util.FelixConstants;
import org.apache.felix.main.AutoActivator;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
public class OSGiFramework implements Runnable
{
private Thread thread;
private boolean stopRequested;
private BundleContext bundleContext = null;
private Bundle bundle = null;
private Felix felixInstance = null;
private Map<String, Object> configMap = null;
private String vehicleId = "";
private HostActivator hostActivator = null;
private final Map lookupMap = new HashMap();
public OSGiFramework(String vehicleId)
{
this.vehicleId = vehicleId;
stopRequested = false;
}
public void start()
{
thread = new Thread(this);
thread.start();
}
public void stopRequest()
{
stopRequested = true;
}
private void initialize()
{
// Initialize the map for the property lookup service.
lookupMap.put("name1", "value1");
lookupMap.put("name2", "value2");
lookupMap.put("name3", "value3");
lookupMap.put("name4", "value4");
// create new map for storing the felix configuration properties
configMap = new HashMap<String, Object>();
// Export the host provided service interface package.
configMap.put(FelixConstants.FRAMEWORK_SYSTEMPACKAGES_EXTRA, "CanEmulator.lookup; version=1.0.0");
// add autoactivator that specifies all bundles that shall be loaded together with the system bundle
configMap.put(AutoActivator.AUTO_START_PROP + ".1", "file:/home/markus/bundles/org.apache.felix.shell-1.2.0.jar " + "file:/home/markus/bundles/org.apache.felix.shell.tui-1.2.0.jar");
List<Object> list = new ArrayList<Object>();
list.add(new AutoActivator(configMap));
// Create host activator;
hostActivator = new HostActivator(lookupMap);
list.add(hostActivator);
configMap.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP, list);
// set felix-cache folder
configMap.put("org.osgi.framework.storage", "felix-cache/" + vehicleId);
}
public BundleContext getBundleContext()
{
return bundleContext;
}
public Bundle[] getInstalledBundles()
{
return bundleContext.getBundles();
}
@SuppressWarnings("unused")
private String getBundleState(Bundle bundle)
{
// get current state of bundle
int state = bundle.getState();
// map state to a String
switch (state)
{
case Bundle.UNINSTALLED:
return "UNINSTALLED";
case Bundle.INSTALLED:
return "INSTALLED";
case Bundle.RESOLVED:
return "RESOLVED";
case Bundle.STARTING:
return "STARTING";
case Bundle.STOPPING:
return "STOPPING";
case Bundle.ACTIVE:
return "ACTIVE";
default:
throw new IllegalStateException("Bundle state '" + state + "' not known");
}
}
public String getVehicleId()
{
return vehicleId;
}
@Override
public void run()
{
try
{
// set framework properties
initialize();
// create & start framework
try
{
felixInstance = new Felix(configMap);
felixInstance.start();
// save reference to the bundle context.
bundleContext = felixInstance.getBundleContext();
}
catch (Exception ex)
{
System.err.println("Could not create felix framework: " + ex);
ex.printStackTrace();
System.exit(1);
}
bundle = bundleContext.installBundle("file:/home/markus/bundles/plugins/TestBundle_1.0.0.jar");
// start bundle
bundle.start();
// wait until the framework shall be stopped
while (!stopRequested)
{
// wait
Thread.sleep(500);
}
// stop bundle
bundle.stop();
// stop framework
felixInstance.stop();
felixInstance.waitForStop(0);
}
catch (Exception e)
{
System.out.println("error: osgi framework crashed");
System.out.println(e);
System.exit(1);
}
}
}
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