public void start(BundleContext bundleContext) throws Exception {

        Properties props = new Properties();
        props.put("description", "An SLF4J LogService implementation.");
        ServiceFactory factory = new LogServiceFactory();
        bundleContext.registerService(LogService.class.getName(), factory, props);
    }
Implements <code>BundleActivator.start()</code> to register a
LogServiceFactory.

@param bundleContext the framework context for the bundle
@throws Exception
osgi-over-slf4j/src/main/java/org/slf4j/osgi/logservice/impl/Activator.java