public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
System.out.println("MyDubboFilter");
RpcInvocation inv = (RpcInvocation) invocation;
inv.setAttachmentIfAbsent("test", "test value from RPC");
Result result = invoker.invoke(invocation);
System.out.println("result in MyDubboFilter: " + result);
return result;
}
