%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2016. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
%%
%%----------------------------------------------------------------------
%% Purpose:
%%----------------------------------------------------------------------
-module(megaco_tc_controller).
-export([start_link/0, stop/0,
insert/2, lookup/1, delete/1]).
-export([init/2]).
-include("megaco_test_lib.hrl").
-define(SERVER, ?MODULE).
-define(TABLE, ?MODULE).
start_link() ->
p("start_link -> entry"),
Pid = spawn_link(?MODULE, init, [self(),get(dbg)]),
receive
{tc_started, Pid, Reply} ->
p("start_link -> ~n ~p", [Reply]),
Reply
end.
stop() ->
request(stop, undefined).
insert(Key, Val) ->
request(insert, {Key, Val}).
lookup(Key) ->
case request(lookup, Key) of
{value, _} = Value ->
Value;
_ ->
false
end.
delete(Key) ->
request(delete, Key).
request(Tag, Data) ->
p("request -> entry with"
"~n Tag: ~p"
"~n Data: ~p", [Tag, Data]),
case global:whereis_name(?SERVER) of
Pid when is_pid(Pid) ->
Pid ! {Tag, self(), Data},
receive
{Tag, Pid, Reply} ->
p("request -> response: "
"~n Reply: ~p", [Reply]),
Reply
end;
_ ->
{error, not_started}
end.
init(Parent, true) ->
put(dbg,true),
init(Parent);
init(Parent, _) ->
init(Parent).
init(Parent) ->
p("init -> entry with"
"~n Parent: ~p", [Parent]),
ets:new(?TABLE, [named_table, protected, set]),
case global:register_name(?SERVER, self()) of
yes ->
p("init -> registration ok"),
Parent ! {tc_started, self(), ok},
loop(Parent);
no ->
p("init -> registration failed"),
Parent ! {tc_started, self(), {error, already_registered}},
exit(normal)
end.
loop(Parent) ->
p("loop -> entry"),
receive
{insert, Parent, {Key, Val}} ->
p("loop -> received insert request when"
"~n Key: ~p"
"~n Val: ~p", [Key, Val]),
ets:insert(?TABLE, {Key, Val}),
Parent ! {insert, self(), ok};
{delete, Parent, Key} ->
p("loop -> received delete request when"
"~n Key: ~p", [Key]),
ets:delete(?TABLE, Key),
Parent ! {delete, self(), ok};
{lookup, From, Key} when is_pid(From) ->
p("loop -> received lookup request when"
"~n Key: ~p", [Key]),
case ets:lookup(?TABLE, Key) of
[{Key, Val}] ->
p("loop -> lookup: ~p", [Val]),
From ! {lookup, self(), {value, Val}};
_ ->
p("loop -> lookup unsuccessful"),
From ! {lookup, self(), false}
end;
{stop, Parent, _} ->
p("loop -> received stop request"),
ets:delete(?TABLE),
global:unregister_name(?SERVER),
Parent ! {stop, self(), ok},
exit(normal);
{'EXIT', Parent, Reason} when is_pid(Parent) ->
p("loop -> received exit signal from parent"
"~n Reason: ~p", [Reason]),
exit(Reason);
{UnknownRequest, Parent, UnknownData} when is_pid(Parent) ->
p("loop -> received unknown request when"
"~n UnknownRequest: ~p"
"~n UnknownData: ~p", [UnknownRequest, UnknownData]),
Error = {error, {unknown_request, {UnknownRequest, UnknownData}}},
Parent ! {UnknownRequest, self(), Error};
{Request, From, Data} when is_pid(From) ->
p("loop -> received request from unknown when"
"~n Request: ~p"
"~n From: ~p"
"~n Data: ~p", [Request, From, Data]),
Error = {error, {unknown_request, {Request, Data}}},
Parent ! {Request, self(), Error};
Crap ->
p("loop -> received crap: "
"~n Crap: ~p"
"~nwhen"
"~n Parent: ~p", [Crap, Parent]),
ok
end,
loop(Parent).
p(F) ->
p(F, []).
p(F, A) ->
p(get(dbg), F, A).
p(true, F, A) ->
io:format("~w:~p:" ++ F ++ "~n", [?MODULE, self()|A]);
p(_, _, _) ->
ok.
