Elixir/Erlang - 跟踪邮件何时到达邮箱

Question

相当直接的问题，是否可以跟踪到达 Process/GenServer（的邮箱）的邮件？请注意，这不同于当邮件为 received 时的跟踪（一旦它离开邮箱并被处理）。直到现在我还没有找到这样做的方法。

Answer 1

在 erlang 中，您在 dbg:p/2 中有它的标志，s 用于发送，r 用于接收：

1> dbg:tracer().
{ok,<0.82.0>}
2> dbg:p(self(), r).
(<0.80.0>) << {dbg,{ok,[{matched,nonode@nohost,1}]}}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.183997>,319}
{ok,[{matched,nonode@nohost,1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184000>,
                        [{expand_fun,#Fun<group.0.82824323>},
                         {echo,true},
                         {binary,false},
                         {encoding,latin1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184002>,ok}
3> self() ! trace_me.
(<0.80.0>) << {shell_cmd,<0.73.0>,
                         {eval,[{op,{1,8},
                                    '!',
                                    {call,{1,1},{atom,{1,1},self},[]},
                                    {atom,{1,10},trace_me}}]},
                         cmd}
(<0.80.0>) << trace_me
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184006>,319}
trace_me
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184008>,
                        [{expand_fun,#Fun<group.0.82824323>},
                         {echo,true},
                         {binary,false},
                         {encoding,latin1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184011>,ok}

Elixir/Erlang - 跟踪邮件何时到达邮箱

Elixir/Erlang - Trace when a message arrives in the mailbox

erlang

elixir

gen-server

actor