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link with client

This commit is contained in:
Feng 2015-10-26 09:21:03 +08:00
parent fb9f1bf8e4
commit 2af91ea140
1 changed files with 21 additions and 23 deletions
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34
src/emqttd_session.erl
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@ -81,9 +81,6 @@
%% Client Pid bind with session
client_pid :: pid(),
%% Client Monitor
client_mon :: reference(),
%% Last packet id of the session
packet_id = 1,
@ -224,7 +221,8 @@ unsubscribe(SessPid, Topics) ->
%%%=============================================================================
init([CleanSess, ClientId, ClientPid]) ->
%% process_flag(trap_exit, true),
process_flag(trap_exit, true),
true = link(ClientPid),
QEnv = emqttd:env(mqtt, queue),
SessEnv = emqttd:env(mqtt, session),
Session = #session{
@ -245,10 +243,8 @@ init([CleanSess, ClientId, ClientPid]) ->
collect_interval = emqttd_opts:g(collect_interval, SessEnv, 0),
timestamp = os:timestamp()},
emqttd_sm:register_session(CleanSess, ClientId, info(Session)),
%% monitor client
MRef = erlang:monitor(process, ClientPid),
%% start statistics
{ok, start_collector(Session#session{client_mon = MRef}), hibernate}.
{ok, start_collector(Session), hibernate}.
prioritise_call(Msg, _From, _Len, _State) ->
case Msg of _ -> 0 end.
@ -268,7 +264,6 @@ prioritise_cast(Msg, _Len, _State) ->
prioritise_info(Msg, _Len, _State) ->
case Msg of
{'DOWN', _, _, _, _} -> 10;
{'EXIT', _, _} -> 10;
session_expired -> 10;
{timeout, _, _} -> 5;
@ -368,7 +363,6 @@ handle_cast({resume, ClientId, ClientPid}, Session) ->
#session{client_id = ClientId,
client_pid = OldClientPid,
client_mon = MRef,
inflight_queue = InflightQ,
awaiting_ack = AwaitingAck,
awaiting_comp = AwaitingComp,
@ -388,10 +382,12 @@ handle_cast({resume, ClientId, ClientPid}, Session) ->
true ->
lager:error([{client, ClientId}], "Session(~s): ~p kickout ~p",
[ClientId, ClientPid, OldClientPid]),
OldClientPid ! {stop, duplicate_id, ClientPid},
erlang:demonitor(MRef, [flush])
unlink(OldClientPid),
OldClientPid ! {stop, duplicate_id, ClientPid}
end,
true = link(ClientPid),
%% Redeliver PUBREL
[ClientPid ! {redeliver, {?PUBREL, PktId}} || PktId <- maps:keys(AwaitingComp)],
@ -402,7 +398,6 @@ handle_cast({resume, ClientId, ClientPid}, Session) ->
[cancel_timer(TRef) || TRef <- maps:values(AwaitingComp)],
Session1 = Session#session{client_pid = ClientPid,
client_mon = erlang:monitor(process, ClientPid),
awaiting_ack = #{},
awaiting_comp = #{},
expired_timer = undefined},
@ -548,20 +543,23 @@ handle_info(collect_info, Session = #session{clean_sess = CleanSess, client_id =
emqttd_sm:register_session(CleanSess, ClientId, info(Session)),
{noreply, start_collector(Session), hibernate};
handle_info({'DOWN', _MRef, process, ClientPid, _}, Session = #session{clean_sess = true,
handle_info({'EXIT', ClientPid, _Reason}, Session = #session{clean_sess = true,
client_pid = ClientPid}) ->
{stop, normal, Session};
handle_info({'DOWN', _MRef, process, ClientPid, _}, Session = #session{clean_sess = false,
handle_info({'EXIT', ClientPid, Reason}, Session = #session{clean_sess = false,
client_id = ClientId,
client_pid = ClientPid,
expired_after = Expires}) ->
lager:info("Session(~s): unlink with client ~p: reason=~p",
[ClientId, ClientPid, Reason]),
TRef = timer(Expires, session_expired),
noreply(Session#session{client_pid = undefined, client_mon = undefined, expired_timer = TRef});
noreply(Session#session{client_pid = undefined, expired_timer = TRef});
handle_info({'DOWN', _MRef, process, Pid, Reason}, Session = #session{client_id = ClientId,
handle_info({'EXIT', Pid, Reason}, Session = #session{client_id = ClientId,
client_pid = ClientPid}) ->
lager:error([{client, ClientId}], "Session(~s): unexpected DOWN: "
"client_pid=~p, down_pid=~p, reason=~p",
lager:error("Session(~s): Unexpected EXIT: client_pid=~p, exit_pid=~p, reason=~p",
[ClientId, ClientPid, Pid, Reason]),
noreply(Session);