diff options
Diffstat (limited to 'src/rexi/src/rexi_server.erl')
| -rw-r--r-- | src/rexi/src/rexi_server.erl | 132 |
1 files changed, 72 insertions, 60 deletions
diff --git a/src/rexi/src/rexi_server.erl b/src/rexi/src/rexi_server.erl index 4cd9ce66e..47c128d7b 100644 --- a/src/rexi/src/rexi_server.erl +++ b/src/rexi/src/rexi_server.erl @@ -13,8 +13,14 @@ -module(rexi_server). -behaviour(gen_server). -vsn(1). --export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, - code_change/3]). +-export([ + init/1, + handle_call/3, + handle_cast/2, + handle_info/2, + terminate/2, + code_change/3 +]). -export([start_link/1, init_p/2, init_p/3]). @@ -24,10 +30,10 @@ -include_lib("rexi/include/rexi.hrl"). -record(job, { - client::reference(), - worker::reference(), - client_pid::pid(), - worker_pid::pid() + client :: reference(), + worker :: reference(), + client_pid :: pid(), + worker_pid :: pid() }). -record(st, { @@ -47,30 +53,27 @@ init([]) -> handle_call(get_errors, _From, #st{errors = Errors} = St) -> {reply, {ok, lists:reverse(queue:to_list(Errors))}, St}; - handle_call(get_last_error, _From, #st{errors = Errors} = St) -> try {reply, {ok, queue:get_r(Errors)}, St} - catch error:empty -> - {reply, {error, empty}, St} + catch + error:empty -> + {reply, {error, empty}, St} end; - -handle_call({set_error_limit, N}, _From, #st{error_count=Len, errors=Q} = St) -> - if N < Len -> - {NewQ, _} = queue:split(N, Q); - true -> - NewQ = Q +handle_call({set_error_limit, N}, _From, #st{error_count = Len, errors = Q} = St) -> + if + N < Len -> + {NewQ, _} = queue:split(N, Q); + true -> + NewQ = Q end, NewLen = queue:len(NewQ), - {reply, ok, St#st{error_limit=N, error_count=NewLen, errors=NewQ}}; - + {reply, ok, St#st{error_limit = N, error_count = NewLen, errors = NewQ}}; handle_call(_Request, _From, St) -> {reply, ignored, St}. - handle_cast({doit, From, MFA}, St) -> handle_cast({doit, From, undefined, MFA}, St); - handle_cast({doit, {ClientPid, ClientRef} = From, Nonce, MFA}, State) -> {LocalPid, Ref} = spawn_monitor(?MODULE, init_p, [From, MFA, Nonce]), Job = #job{ @@ -80,60 +83,61 @@ handle_cast({doit, {ClientPid, ClientRef} = From, Nonce, MFA}, State) -> worker_pid = LocalPid }, {noreply, add_job(Job, State)}; - - handle_cast({kill, FromRef}, St) -> kill_worker(FromRef, St), {noreply, St}; - handle_cast({kill_all, FromRefs}, St) -> lists:foreach(fun(FromRef) -> kill_worker(FromRef, St) end, FromRefs), {noreply, St}; - handle_cast(_, St) -> couch_log:notice("rexi_server ignored_cast", []), {noreply, St}. -handle_info({'DOWN', Ref, process, _, normal}, #st{workers=Workers} = St) -> +handle_info({'DOWN', Ref, process, _, normal}, #st{workers = Workers} = St) -> case find_worker(Ref, Workers) of - #job{} = Job -> - {noreply, remove_job(Job, St)}; - false -> - {noreply, St} + #job{} = Job -> + {noreply, remove_job(Job, St)}; + false -> + {noreply, St} end; - -handle_info({'DOWN', Ref, process, Pid, Error}, #st{workers=Workers} = St) -> +handle_info({'DOWN', Ref, process, Pid, Error}, #st{workers = Workers} = St) -> case find_worker(Ref, Workers) of - #job{worker_pid=Pid, worker=Ref, client_pid=CPid, client=CRef} =Job -> - case Error of #error{reason = {_Class, Reason}, stack = Stack} -> - notify_caller({CPid, CRef}, {Reason, Stack}), - St1 = save_error(Error, St), - {noreply, remove_job(Job, St1)}; - _ -> - notify_caller({CPid, CRef}, Error), - {noreply, remove_job(Job, St)} - end; - false -> - {noreply, St} + #job{worker_pid = Pid, worker = Ref, client_pid = CPid, client = CRef} = Job -> + case Error of + #error{reason = {_Class, Reason}, stack = Stack} -> + notify_caller({CPid, CRef}, {Reason, Stack}), + St1 = save_error(Error, St), + {noreply, remove_job(Job, St1)}; + _ -> + notify_caller({CPid, CRef}, Error), + {noreply, remove_job(Job, St)} + end; + false -> + {noreply, St} end; - handle_info(_Info, St) -> {noreply, St}. terminate(_Reason, St) -> - ets:foldl(fun(#job{worker_pid=Pid},_) -> exit(Pid,kill) end, nil, - St#st.workers), + ets:foldl( + fun(#job{worker_pid = Pid}, _) -> exit(Pid, kill) end, + nil, + St#st.workers + ), ok. -code_change(_OldVsn, #st{}=State, _Extra) -> +code_change(_OldVsn, #st{} = State, _Extra) -> {ok, State}. init_p(From, MFA) -> init_p(From, MFA, undefined). %% @doc initializes a process started by rexi_server. --spec init_p({pid(), reference()}, {atom(), atom(), list()}, - string() | undefined) -> any(). +-spec init_p( + {pid(), reference()}, + {atom(), atom(), list()}, + string() | undefined +) -> any(). init_p(From, {M,F,A}, Nonce) -> put(rexi_from, From), put('$initial_call', {M,F,length(A)}), @@ -158,13 +162,19 @@ init_p(From, {M,F,A}, Nonce) -> save_error(_E, #st{error_limit = 0} = St) -> St; -save_error(E, #st{errors=Q, error_limit=L, error_count=C} = St) when C >= L -> +save_error(E, #st{errors = Q, error_limit = L, error_count = C} = St) when C >= L -> St#st{errors = queue:in(E, queue:drop(Q))}; -save_error(E, #st{errors=Q, error_count=C} = St) -> - St#st{errors = queue:in(E, Q), error_count = C+1}. +save_error(E, #st{errors = Q, error_count = C} = St) -> + St#st{errors = queue:in(E, Q), error_count = C + 1}. clean_stack(S) -> - lists:map(fun({M,F,A}) when is_list(A) -> {M,F,length(A)}; (X) -> X end, S). + lists:map( + fun + ({M, F, A}) when is_list(A) -> {M, F, length(A)}; + (X) -> X + end, + S + ). add_job(Job, #st{workers = Workers, clients = Clients} = State) -> ets:insert(Workers, Job), @@ -177,19 +187,21 @@ remove_job(Job, #st{workers = Workers, clients = Clients} = State) -> State. find_worker(Ref, Tab) -> - case ets:lookup(Tab, Ref) of [] -> false; [Worker] -> Worker end. + case ets:lookup(Tab, Ref) of + [] -> false; + [Worker] -> Worker + end. notify_caller({Caller, Ref}, Reason) -> rexi_utils:send(Caller, {Ref, {rexi_EXIT, Reason}}). - kill_worker(FromRef, #st{clients = Clients} = St) -> case find_worker(FromRef, Clients) of - #job{worker = KeyRef, worker_pid = Pid} = Job -> - erlang:demonitor(KeyRef), - exit(Pid, kill), - remove_job(Job, St), - ok; - false -> - ok + #job{worker = KeyRef, worker_pid = Pid} = Job -> + erlang:demonitor(KeyRef), + exit(Pid, kill), + remove_job(Job, St), + ok; + false -> + ok end. |