1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2012-2016. 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%
%%
-module(proto).
-compile(export_all).
-record(conn_state, {id, pid, ref, data}).
%% TEST1: N connections (same key) -> N conn pids
%% TEST2: N connections (same key) -> 1 conn pid
%% TEST3: N aliases (same key) -> N conn pids
%% TEST4: N aliases (same key) -> 1 conn pid
open(KeyOrAlias) ->
case ct:get_config(KeyOrAlias) of
undefined ->
{error,{not_available,KeyOrAlias}};
ConnData ->
io:format("Opening connection with ~p~n", [ConnData]),
%% if KeyOrAlias == Key, each call returns unique handle
%% if KeyOrAlias == Alias, successive calls return same handle
{ok,Handle} = ct_gen_conn:start(ConnData,
[],
?MODULE,
[{name,KeyOrAlias}]),
io:format("Handle for ~p = ~p~n", [KeyOrAlias,Handle]),
Handle
end.
close(AliasOrHandle) ->
Handle = get_handle(AliasOrHandle),
io:format("Closing connection for ~p (~p)~n", [AliasOrHandle,Handle]),
case ct_gen_conn:stop(Handle) of
E = {error,_} ->
E;
Result ->
Result
end.
kill_conn_proc(AliasOrHandle) ->
ConnPid = ct_gen_conn:get_conn_pid(get_handle(AliasOrHandle)),
io:format("Killing connection process ~p~n", [ConnPid]),
ConnPid ! fail,
ok.
send(_) ->
ok.
%%%-----------------------------------------------------------------
%%%
init(KeyOrAlias, ConnData, []) ->
Addr = proplists:get_value(addr, ConnData),
Port = proplists:get_value(port, ConnData),
Ref = make_ref(),
Starter = self(),
MultConnPids = proplists:get_value(multiple_conn_pids, ConnData),
ConnPid =
case MultConnPids of
true ->
spawn(fun() -> active_conn(Starter, KeyOrAlias, Ref,
ConnData) end);
_ ->
ConnMgr = proplists:get_value(conn_mgr_name, ConnData),
case whereis(ConnMgr) of
undefined ->
MgrPid =
spawn(fun() -> active_conn(Starter, KeyOrAlias,
Ref, ConnData) end),
receive MgrPid ->
MgrPid
end;
MgrPid when is_pid(MgrPid) ->
MgrPid ! {connect,Ref},
MgrPid
end
end,
io:format("Connection ~p opened on ~p:~p -> ~p (~p)~n",
[KeyOrAlias,Addr,Port,ConnPid,Ref]),
{ok,ConnPid,#conn_state{id=KeyOrAlias, pid=ConnPid, ref=Ref, data=ConnData}}.
terminate(ConnPid, #conn_state{id=Id, pid=ConnPid, ref = Ref, data=Data}) ->
case proplists:get_value(multiple_conn_pids, Data) of
true ->
ConnPid ! close;
_ ->
ConnPid ! {close,Ref}
end,
io:format("Connection ~p on ~p (~p) closing!~n", [Id,ConnPid,Ref]),
ok.
reconnect(ConnData, State = #conn_state{id=Id, ref=DeadRef}) ->
io:format("Reconnect for ~p initiated...~n", [DeadRef]),
case application:get_env(ct_test, reconnect) of
{ok,true} ->
ConnMgr = proplists:get_value(conn_mgr_name, ConnData),
NewRef = make_ref(),
Starter = self(),
ConnPid =
case proplists:get_value(multiple_conn_pids, ConnData) of
true ->
spawn(fun() ->
active_conn(Starter, Id, NewRef,
ConnData)
end);
_ ->
case whereis(ConnMgr) of
undefined ->
MgrPid =
spawn(fun() ->
active_conn(Starter, Id,
NewRef, ConnData)
end),
receive MgrPid ->
MgrPid
end;
MgrPid ->
MgrPid ! {reconnect,DeadRef,NewRef},
MgrPid
end
end,
io:format("Connection ~p reopened on ~p (~p)~n",
[Id,ConnPid,NewRef]),
{ok,ConnPid,State#conn_state{pid=ConnPid, ref=NewRef}};
_ ->
{error,no_reconnection_allowed}
end.
%%%-----------------------------------------------------------------
%%%
active_conn(Starter, Id, Ref, ConnData) ->
ConnMgr = proplists:get_value(conn_mgr_name, ConnData),
case proplists:get_value(multiple_conn_pids, ConnData) of
true ->
ok;
_ ->
register(ConnMgr,self()),
io:format("Connection manager ~p on ~p started for "
"~p and ~p~n",
[ConnMgr,self(),Id,Ref])
end,
Starter ! self(),
active_conn_loop(ConnData, [Ref]).
active_conn_loop(ConnData, Conns) ->
receive
{connect,Ref} ->
io:format("Connecting ~p on ~p~n",
[Ref,self()]),
active_conn_loop(ConnData, [Ref | Conns]);
{reconnect,DeadRef,NewRef} ->
Conns1 = [NewRef | lists:delete(DeadRef, Conns)],
io:format("Reconnecting on ~p: ~p -> ~p~n",
[self(),DeadRef,NewRef]),
active_conn_loop(ConnData, Conns1);
close ->
io:format("Conn process ~p shutting down~n", [self()]),
ok;
{close,Ref} ->
io:format("Closing connection ~p on ~p~n", [Ref,self()]),
case proplists:delete(Ref, Conns) of
[] ->
io:format("Last connection on ~p closed, "
"now stopping~n", [self()]),
ok;
Conns1 ->
active_conn_loop(ConnData, Conns1)
end;
fail ->
io:format("Connection process not feeling good...~n", []),
exit(kaboom);
{respond,To} ->
To ! {self(),hello},
active_conn_loop(ConnData, Conns)
end.
%%%-----------------------------------------------------------------
%%%
get_handle(AliasOrHandle) when is_pid(AliasOrHandle) ->
AliasOrHandle;
get_handle(AliasOrHandle) ->
{ok,{H,_}} = ct_util:get_connection(AliasOrHandle,
?MODULE),
H.
|
