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Diffstat (limited to 'src/couchdb/couch_task_status.erl')
-rw-r--r-- | src/couchdb/couch_task_status.erl | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/src/couchdb/couch_task_status.erl b/src/couchdb/couch_task_status.erl deleted file mode 100644 index c4487dc4..00000000 --- a/src/couchdb/couch_task_status.erl +++ /dev/null @@ -1,124 +0,0 @@ -% 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(couch_task_status). --behaviour(gen_server). - -% This module allows is used to track the status of long running tasks. -% Long running tasks register (add_task/3) then update their status (update/1) -% and the task and status is added to tasks list. When the tracked task dies -% it will be automatically removed the tracking. To get the tasks list, use the -% all/0 function - --export([start_link/0, stop/0]). --export([all/0, add_task/3, update/1, update/2, set_update_frequency/1]). - --export([init/1, terminate/2, code_change/3]). --export([handle_call/3, handle_cast/2, handle_info/2]). - --import(couch_util, [to_binary/1]). - --include("couch_db.hrl"). - - -start_link() -> - gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). - - -stop() -> - gen_server:cast(?MODULE, stop). - - -all() -> - gen_server:call(?MODULE, all). - - -add_task(Type, TaskName, StatusText) -> - put(task_status_update, {{0, 0, 0}, 0}), - Msg = { - add_task, - to_binary(Type), - to_binary(TaskName), - to_binary(StatusText) - }, - gen_server:call(?MODULE, Msg). - - -set_update_frequency(Msecs) -> - put(task_status_update, {{0, 0, 0}, Msecs * 1000}). - - -update(StatusText) -> - update("~s", [StatusText]). - -update(Format, Data) -> - {LastUpdateTime, Frequency} = get(task_status_update), - case timer:now_diff(Now = now(), LastUpdateTime) >= Frequency of - true -> - put(task_status_update, {Now, Frequency}), - Msg = ?l2b(io_lib:format(Format, Data)), - gen_server:cast(?MODULE, {update_status, self(), Msg}); - false -> - ok - end. - - -init([]) -> - % read configuration settings and register for configuration changes - ets:new(?MODULE, [ordered_set, protected, named_table]), - {ok, nil}. - - -terminate(_Reason,_State) -> - ok. - - -handle_call({add_task, Type, TaskName, StatusText}, {From, _}, Server) -> - case ets:lookup(?MODULE, From) of - [] -> - true = ets:insert(?MODULE, {From, {Type, TaskName, StatusText}}), - erlang:monitor(process, From), - {reply, ok, Server}; - [_] -> - {reply, {add_task_error, already_registered}, Server} - end; -handle_call(all, _, Server) -> - All = [ - [ - {type, Type}, - {task, Task}, - {status, Status}, - {pid, ?l2b(pid_to_list(Pid))} - ] - || - {Pid, {Type, Task, Status}} <- ets:tab2list(?MODULE) - ], - {reply, All, Server}. - - -handle_cast({update_status, Pid, StatusText}, Server) -> - [{Pid, {Type, TaskName, _StatusText}}] = ets:lookup(?MODULE, Pid), - ?LOG_DEBUG("New task status for ~s: ~s",[TaskName, StatusText]), - true = ets:insert(?MODULE, {Pid, {Type, TaskName, StatusText}}), - {noreply, Server}; -handle_cast(stop, State) -> - {stop, normal, State}. - -handle_info({'DOWN', _MonitorRef, _Type, Pid, _Info}, Server) -> - %% should we also erlang:demonitor(_MonitorRef), ? - ets:delete(?MODULE, Pid), - {noreply, Server}. - - -code_change(_OldVsn, State, _Extra) -> - {ok, State}. - |