It's possible that the HttpService published in the service registry
is not compatible with your bundle that is trying to track it. This
could happen if you have multiple bundles exporting the
org.osgi.service.http package, or if your tracking bundle has somehow
included the org.osgi.service.http package instead of importing it.
To check if this is the case, try changing the start() method of your
Activator to call httpServiceTracker.open(true) rather than just
httpServiceTracker.open(). This will force the tracker to find all
HttpServices, even the incompatible ones. Of course you will soon get
a ClassCastException when you try to use the returned service, so you
need to fix the underlying problem. Doing this will simply tell you if
that is indeed the problem.
Regards,
Neil
On Thu, Jan 29, 2009 at 1:48 PM, Vinicius Carvalho
<[email protected]> wrote:
Hello all, sorry for always comming back on the same subject, but
tomorrow
is our deadline, and even we got some progress on the osgi front with
spring
(we now have services and dependency injection working). Nothing seems
to
work on the HttpService integration.
We tried almost everything to get equinox running inside a servlet
container. The documentation on equinox servlet bridge is almost
inexistent.
We are not using their servletbridge since it starts the osgi container
and
that is something we are doing in our code (following the sling
approach)
What seems to be happening is that any service tracker registered to
HttpService never gets called, ever... We've seen this on the
OsgiManager
class, and now we decided to drop our own little servlet bundle:
public class Activator implements BundleActivator {
private ServiceTracker httpServiceTracker;
public void start(BundleContext context) throws Exception {
httpServiceTracker = new HttpServiceTracker(context);
httpServiceTracker.open();
}
public void stop(BundleContext arg0) throws Exception {
httpServiceTracker.close();
httpServiceTracker = null;
}
private class HttpServiceTracker extends ServiceTracker {
public HttpServiceTracker(BundleContext context) {
super(context, HttpService.class.getName(), null);
}
public Object addingService(ServiceReference reference) {
HttpService httpService = (HttpService)
context.getService(reference);
try {
httpService.registerServlet("/dummy", new DummyServlet(),
null, null); //$NON-NLS-1$
} catch (Exception e) {
e.printStackTrace();
}
return httpService;
}
public void removedService(ServiceReference reference, Object
service) {
HttpService httpService = (HttpService) service;
httpService.unregister("/dummy"); //$NON-NLS-1$
super.removedService(reference, service);
}
}
}
Well, the adding servlet never gets called :(
Here how we start the felix container:
public void init() throws ServletException {
ServletContextResourceProvider rp = new
ServletContextResourceProvider(getServletContext());
Logger logger = new ServletContextLogger(getServletContext());
Map<Object, Object> props = loadProperties();
this.osl = new OSL(rp,props,logger);
this.delegatee = new HttpServiceServlet();
this.delegatee.init(getServletConfig());
super.init();
}
public class OSL implements BundleActivator {
private Felix felix;
private ReadWriteLock felixLock;
private ResourceProvider resourceProvider;
private Logger logger;
private BundleActivator httpServiceActivator;
public OSL(ResourceProvider rp, Map<Object, Object> props, Logger
logger){
this.resourceProvider = rp;
this.logger = logger;
List<BundleActivator> activators = new
ArrayList<BundleActivator>();
activators.add(this);
activators.add(new BootstrapInstaller(logger,rp));
props.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP,
activators);
Felix tmpFelix = new Felix(props);
try {
tmpFelix.start();
this.felix = tmpFelix;
} catch (Exception e) {
e.printStackTrace();
}
}
public void start(BundleContext context) throws Exception {
this.httpServiceActivator = new Activator();
this.httpServiceActivator.start(context);
}
As you can see, we are starting the Httpservice ourselves, we tried to
not
do so and pack it with the other bundles, but the effect is the same
(do
not
call the addingservice)
After the complete startup we have these services:
System Bundle (0) provides:
---------------------------
org.osgi.service.startlevel.StartLevel
org.osgi.service.packageadmin.PackageAdmin
org.osgi.service.http.HttpService
So I guess the HttpService is up and running.
Is there anything else that we could do? Any other point to look at,
replace
class, packaging format, anything please. Tomorrow if we don't present
at
least one servlet (we needed at least the GWT-RPC working but one
servlet
should do it), we may have to drop osgi for good, and that's something
we
are really not willing to do :(
Regards
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