anchor.diff:  
   %%
   %% client to server
  -%% this is for direct call test.
  +%% this is for direct call test. (why test?, -> all clients access to this via AMQP.)
   %%
   new_account(Id, Password) -> impl_new_account(Id, Password).
   login(Id, Password) -> impl_login(Id, Password).
  
positive.code: -export([handle_info/2]).
  -export([handle_call/3]).
  -export([ctest/0]).
  -export([ctest2/0]).
  
  -export([rpc_echo/1]).
  -export([rpc_make_new_account/2]).
  
negative.code: 	{<<"offline">>,		{?MODULE, rpc_offline}}
  ].
  
  %%
  %% server process body here.
  %%
  %%
  rpc_echo(_Payload) -> term_to_binary({ok,"echo!!"}).
  rpc_make_new_account(LoginId, Password) -> term_to_binary({ng, notoken}).
  rpc_login(LoginId, Password) -> term_to_binary({ng, notoken}).
  rpc_logout(Token) -> term_to_binary(ng).
  rpc_check_token(Token) -> ng.
  rpc_online(Token) -> ng.
  rpc_offline(Token) -> ng.
  