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Diffstat (limited to 'apps/rexi/src/rexi_server.erl')
-rw-r--r-- | apps/rexi/src/rexi_server.erl | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/apps/rexi/src/rexi_server.erl b/apps/rexi/src/rexi_server.erl deleted file mode 100644 index eb9b0ca2..00000000 --- a/apps/rexi/src/rexi_server.erl +++ /dev/null @@ -1,100 +0,0 @@ -% Copyright 2010 Cloudant -% -% Licensed under the Apache License, Version 2.0 (the "License"); you may not -% use this file except in compliance with the License. You may obtain a copy of -% the License at -% -% http://www.apache.org/licenses/LICENSE-2.0 -% -% Unless required by applicable law or agreed to in writing, software -% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT -% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the -% License for the specific language governing permissions and limitations under -% the License. - --module(rexi_server). --behaviour(gen_server). --export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, - code_change/3]). - --export([start_link/0, init_p/2]). - --include_lib("eunit/include/eunit.hrl"). - --record(st, { - workers = ets:new(workers, [private, {keypos,2}]) -}). - -start_link() -> - gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). - -init([]) -> - {ok, #st{}}. - -handle_call(_Request, _From, St) -> - {reply, ignored, St}. - -handle_cast({doit, From, MFA}, #st{workers=Workers} = St) -> - {LocalPid, Ref} = spawn_monitor(?MODULE, init_p, [From, MFA]), - {noreply, St#st{workers = add_worker({LocalPid, Ref, From}, Workers)}}; - -handle_cast({kill, FromRef}, #st{workers=Workers} = St) -> - case find_worker_from(FromRef, Workers) of - {Pid, KeyRef, {_, FromRef}} -> - erlang:demonitor(KeyRef), - exit(Pid, kill), - {noreply, St#st{workers = remove_worker(KeyRef, Workers)}}; - false -> - {noreply, St} - end. - -handle_info({'DOWN', Ref, process, _, normal}, #st{workers=Workers} = St) -> - {noreply, St#st{workers = remove_worker(Ref, Workers)}}; - -handle_info({'DOWN', Ref, process, Pid, Reason}, #st{workers=Workers} = St) -> - case find_worker(Ref, Workers) of - {Pid, Ref, From} -> - notify_caller(From, Reason), - {noreply, St#st{workers = remove_worker(Ref, Workers)}}; - false -> - {noreply, St} - end; - -handle_info(_Info, St) -> - {noreply, St}. - -terminate(_Reason, St) -> - ets:foldl(fun({Pid, _, _}, _) -> exit(Pid,kill) end, nil, St#st.workers), - ok. - -code_change(_OldVsn, St, _Extra) -> - {ok, St}. - -%% @doc initializes a process started by rexi_server. --spec init_p({pid(), reference()}, {atom(), atom(), list()}) -> any(). -init_p(From, {M,F,A}) -> - put(rexi_from, From), - put(initial_call, {M,F,length(A)}), - try apply(M, F, A) catch _:Reason -> exit(Reason) end. - -%% internal - -add_worker(Worker, Tab) -> - ets:insert(Tab, Worker), Tab. - -remove_worker(Ref, Tab) -> - ets:delete(Tab, Ref), Tab. - -find_worker(Ref, Tab) -> - case ets:lookup(Tab, Ref) of [] -> false; [Worker] -> Worker end. - -find_worker_from(Ref, Tab) -> - case ets:match_object(Tab, {'_', '_', {'_', Ref}}) of - [] -> - false; - [Worker] -> - Worker - end. - -notify_caller({Caller, Ref}, Reason) -> - Caller ! {Ref, {rexi_EXIT, Reason}}. |