See the pseudo code as below. During OSGI bundle activation we want to register
the org.apache.cxf.transport.servlet.CXFServlet servlet with the whiteboard
pattern, get the cxf bus returned from the servlet and set it as the default
bus of BusFactory, and after that publish the endpoints by calling
javax.xml.ws.Endpoint.publish(). By doing this we can receive SOAP calls from
HP devices and also send SOAP calls to HP devices.
In our old product we registered the CXFServlet servlet by calling
httpService.registerServlet(…), the cxf bus retrieved from the CXFServlet was
not null (which was actually an org.apache.cxf.bus.spring.SpringBus object),
and the communication with HP device was always fine. Due to the OSGI version
upgrading for our product we change to use the whiteboard pattern to do the
registration and we notice the returned cxf bus from the CXFServlet is null
after calling bundleContext.registerService(…) , and also, the published
endpoints are not there for listening. We are trying to find a solution. The
experimentations showed the way to make it work is to get the
org.osgi.service.http.HttpService reference ready first, and then call
bundleContext.registerService(…) to register the CXFServlet. With this way the
returned cxf bus is not null anymore and the communication between the web
server and HP device is fine.
As per tests and experimentations, the OSGI HttpService instance seems to be
lazy started. In order to get the org.osgi.service.http.HttpService reference
ready (which is actually an
org.apache.felix.http.base.internal.service.PerBundleHttpServiceImpl object),
there has to be a web request sent to the web server. For example, in the code
make a web request to the web server itself. But, this does not seem to be
elegant . ) Is there any other way to make the OSGI HttpService reference ready
before calling bundleContext.registerService()?
... ...
import javax.servlet.Servlet;
import javax.xml.ws.Endpoint;
import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.transport.http.osgi.HTTPTransportActivator;
import org.apache.cxf.transport.servlet.CXFServlet;
... ...
@Component(service = { HPOmniWebServicePublishComponent.class })
public class HPOmniWebServicePublishComponent implements IWebComponent {
... ...
private HTTPTransportActivator httpTransportActivator = new
HTTPTransportActivator();
... ...
@Activate
public void activate(ComponentContext ctx)
{
try {
// Set value for keystore and keystore password
... ...
System.setProperty("javax.net.ssl.keyStore", keyStoreLocation);
System.setProperty("javax.net.ssl.keyStorePassword", password);
... ...
httpTransportActivator.start(ctx.getBundleContext());
} catch (NoClassDefFoundError | Exception exception) {
// Log error for starting HTTPTransportActivator
}
… …
ClassLoader currentcl = Thread.currentThread().getContextClassLoader();
try {
// set classloader to CXF bundle class loader to avoid OSGi
classloader problems
ClassLoader bundlecl = BusFactory.class.getClassLoader();
Thread.currentThread().setContextClassLoader(bundlecl);
... ...
System.setProperty("javax.xml.ws.spi.Provider",
"org.apache.cxf.jaxws.spi.ProviderImpl");
… …
org.apache.cxf.transport.servlet.CXFServlet servlet = new
org.apache.cxf.transport.servlet.CXFServlet();
BundleContext bundleContext = ctx.getBundleContext();
params.put(HttpWhiteboardConstants.HTTP_WHITEBOARD_SERVLET_PATTERN,
ApplicationFactory.SERVICE_BASE_PATH);
params.put(HttpWhiteboardConstants.HTTP_WHITEBOARD_CONTEXT_SELECT,
"(osgi.http.whiteboard.context.name=org.osgi.service.http)");
cxfServletRegistration =
bundleContext.registerService(Servlet.class, servlet, params); // Register the
org.apache.cxf.transport.servlet.CXFServlet servlet
org.apache.cxf.Bus bus = servlet.getBus(); // The returned
org.apache.cxf.Bus bus is always null if we didn’t get OSGI HttpService
reference ready before calling bundleContext.registerService(Servlet.class,
servlet, params);
BusFactory.setDefaultBus(bus); //org.apache.cxf.BusFactory
// Publishe endpoints for specified implementors
Endpoint.publish("/HPOmniWebAuthenticationAgentService",
jaxwsAuthenticationAgent);
... ...
Thanks.
Justin Li
