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; }