@Override
public String processCall( String payload ) throws SerializationException {
Map<Class<?>, Boolean> whitelist = new HashMap<Class<?>, Boolean>();
whitelist.put( GwtRpcProxyException.class, Boolean.TRUE );
Map<Class<?>, String> obfuscatedTypeIds = new HashMap<Class<?>, String>();
StandardSerializationPolicy policy = new StandardSerializationPolicy( whitelist, whitelist, obfuscatedTypeIds );
String servletContextPath = getServletContextPath();
Object target = null;
try {