code: /** 
   * Empty notify cause forbidden, non-empty notify cancels forbidden state
   */
  @Test public void testEmptyNotifyCauseForbidden(){
    RegistryDirectory registryDirectory=getRegistryDirectory();
    List invokers=null;
    List<URL> serviceUrls=new ArrayList<URL>();
    registryDirectory.notify(serviceUrls);
    RpcInvocation inv=new RpcInvocation();
    try {
      invokers=registryDirectory.list(inv);
    }
   catch (  RpcException e) {
      Assert.assertEquals(RpcException.FORBIDDEN_EXCEPTION,e.getCode());
      Assert.assertEquals(false,registryDirectory.isAvailable());
    }
    serviceUrls.add(SERVICEURL.addParameter("methods","getXXX1"));
    serviceUrls.add(SERVICEURL2.addParameter("methods","getXXX1,getXXX2"));
    serviceUrls.add(SERVICEURL3.addParameter("methods","getXXX1,getXXX2,getXXX3"));
    registryDirectory.notify(serviceUrls);
    inv.setMethodName("getXXX2");
    invokers=registryDirectory.list(inv);
    Assert.assertEquals(true,registryDirectory.isAvailable());
    Assert.assertEquals(2,invokers.size());
  }
  