public void cacheListenerAdded(final ServiceReference ref, NodeCacheListener handler){
Long pid = (Long) ref.getProperty(org.osgi.framework.Constants.SERVICE_ID);
handlers.put(pid, handler);
public void cacheListenerAdded(final ServiceReference ref, NodeCacheListener handler){
Long pid = (Long) ref.getProperty(org.osgi.framework.Constants.SERVICE_ID);
handlers.put(pid, handler);