summaryrefslogtreecommitdiff
path: root/1.1.x/src/couchdb/couch_external_manager.erl
diff options
context:
space:
mode:
Diffstat (limited to '1.1.x/src/couchdb/couch_external_manager.erl')
-rw-r--r--1.1.x/src/couchdb/couch_external_manager.erl101
1 files changed, 0 insertions, 101 deletions
diff --git a/1.1.x/src/couchdb/couch_external_manager.erl b/1.1.x/src/couchdb/couch_external_manager.erl
deleted file mode 100644
index 7e401389..00000000
--- a/1.1.x/src/couchdb/couch_external_manager.erl
+++ /dev/null
@@ -1,101 +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_external_manager).
--behaviour(gen_server).
-
--export([start_link/0, execute/2, config_change/2]).
--export([init/1, terminate/2, code_change/3, handle_call/3, handle_cast/2, handle_info/2]).
-
--include("couch_db.hrl").
-
-start_link() ->
- gen_server:start_link({local, couch_external_manager},
- couch_external_manager, [], []).
-
-execute(UrlName, JsonReq) ->
- Pid = gen_server:call(couch_external_manager, {get, UrlName}),
- case Pid of
- {error, Reason} ->
- Reason;
- _ ->
- couch_external_server:execute(Pid, JsonReq)
- end.
-
-config_change("external", UrlName) ->
- gen_server:call(couch_external_manager, {config, UrlName}).
-
-% gen_server API
-
-init([]) ->
- process_flag(trap_exit, true),
- Handlers = ets:new(couch_external_manager_handlers, [set, private]),
- couch_config:register(fun config_change/2),
- {ok, Handlers}.
-
-terminate(_Reason, Handlers) ->
- ets:foldl(fun({_UrlName, Pid}, nil) ->
- couch_external_server:stop(Pid),
- nil
- end, nil, Handlers),
- ok.
-
-handle_call({get, UrlName}, _From, Handlers) ->
- case ets:lookup(Handlers, UrlName) of
- [] ->
- case couch_config:get("external", UrlName, nil) of
- nil ->
- Msg = lists:flatten(
- io_lib:format("No server configured for ~p.", [UrlName])),
- {reply, {error, {unknown_external_server, ?l2b(Msg)}}, Handlers};
- Command ->
- {ok, NewPid} = couch_external_server:start_link(UrlName, Command),
- true = ets:insert(Handlers, {UrlName, NewPid}),
- {reply, NewPid, Handlers}
- end;
- [{UrlName, Pid}] ->
- {reply, Pid, Handlers}
- end;
-handle_call({config, UrlName}, _From, Handlers) ->
- % A newly added handler and a handler that had it's command
- % changed are treated exactly the same.
-
- % Shutdown the old handler.
- case ets:lookup(Handlers, UrlName) of
- [{UrlName, Pid}] ->
- couch_external_server:stop(Pid);
- [] ->
- ok
- end,
- % Wait for next request to boot the handler.
- {reply, ok, Handlers}.
-
-handle_cast(_Whatever, State) ->
- {noreply, State}.
-
-handle_info({'EXIT', Pid, normal}, Handlers) ->
- ?LOG_INFO("EXTERNAL: Server ~p terminated normally", [Pid]),
- % The process terminated normally without us asking - Remove Pid from the
- % handlers table so we don't attempt to reuse it
- ets:match_delete(Handlers, {'_', Pid}),
- {noreply, Handlers};
-
-handle_info({'EXIT', Pid, Reason}, Handlers) ->
- ?LOG_INFO("EXTERNAL: Server ~p died. (reason: ~p)", [Pid, Reason]),
- % Remove Pid from the handlers table so we don't try closing
- % it a second time in terminate/2.
- ets:match_delete(Handlers, {'_', Pid}),
- {stop, normal, Handlers}.
-
-code_change(_OldVsn, State, _Extra) ->
- {ok, State}.
-