| package org.onlab.osgi; |
| |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.FrameworkUtil; |
| import org.osgi.framework.ServiceReference; |
| |
| /** |
| * Default implementation of the service directory using OSGi framework utilities. |
| */ |
| public class DefaultServiceDirectory implements ServiceDirectory { |
| |
| /** |
| * Returns the reference to the implementation of the specified service. |
| * |
| * @param serviceClass service class |
| * @param <T> type of service |
| * @return service implementation |
| */ |
| public static <T> T getService(Class<T> serviceClass) { |
| BundleContext bc = FrameworkUtil.getBundle(serviceClass).getBundleContext(); |
| if (bc != null) { |
| ServiceReference<T> reference = bc.getServiceReference(serviceClass); |
| if (reference != null) { |
| T impl = bc.getService(reference); |
| if (impl != null) { |
| return impl; |
| } |
| } |
| } |
| throw new ServiceNotFoundException("Service " + serviceClass.getName() + " not found"); |
| } |
| |
| @Override |
| public <T> T get(Class<T> serviceClass) { |
| return getService(serviceClass); |
| } |
| |
| } |