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
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010-2016. 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: The HDLT server module.
%% This is just a stub, making future expansion easy.
%% All code in this module is executed in the local node!
%%----------------------------------------------------------------------
-module(hdlt_server).
-export([start/1, stop/0, start_inets/0, start_service/1]).
-export([proxy/1]).
-include_lib("kernel/include/file.hrl").
-include("hdlt_logger.hrl").
-define(PROXY, hdlt_proxy).
%% This function is used to start the proxy process
%% This function is called *after* the nodes has been
%% "connected" with the controller/collector node.
start(Debug) ->
proc_lib:start(?MODULE, proxy, [Debug]).
stop() ->
?PROXY ! stop.
start_inets() ->
?PROXY ! start_inets.
start_service(Config) ->
?PROXY ! {server_start, Config, self()},
receive
{server_start_result, Result} ->
Result
after 15000 ->
{error, timeout}
end.
proxy(Debug) ->
process_flag(trap_exit, true),
erlang:register(?PROXY, self()),
?SET_NAME("HDLT PROXY"),
?SET_LEVEL(Debug),
?LOG("starting", []),
Ref = await_for_controller(10),
CtrlNode = node(Ref),
erlang:monitor_node(CtrlNode, true),
proc_lib:init_ack({ok, self()}),
?DEBUG("started", []),
proxy_loop(Ref, CtrlNode).
await_for_controller(N) when N > 0 ->
case global:whereis_name(hdlt_ctrl) of
Pid when is_pid(Pid) ->
erlang:monitor(process, Pid);
_ ->
timer:sleep(1000),
await_for_controller(N-1)
end;
await_for_controller(_) ->
proc_lib:init_ack({error, controller_not_found, nodes()}),
timer:sleep(500),
halt().
proxy_loop(Ref, CtrlNode) ->
?DEBUG("await command", []),
receive
stop ->
?LOG("received stop", []),
halt();
start_inets ->
?LOG("start the inets service framework", []),
case (catch inets:start()) of
ok ->
?LOG("framework started", []),
proxy_loop(Ref, CtrlNode);
Error ->
?LOG("failed starting inets service framework: "
"~n Error: ~p", [Error]),
halt()
end;
{server_start, Config, From} ->
?LOG("start-server", []),
maybe_start_crypto_and_ssl(Config),
%% inets:enable_trace(max, "/tmp/inets-httpd-trace.log", httpd),
%% inets:enable_trace(max, "/tmp/inets-httpd-trace.log", all),
case (catch inets:start(httpd, Config)) of
{ok, _} ->
?LOG("server started when"
"~n which(inets): ~p"
"~n RootDir: ~p"
"~n System info: ~p", [code:which(inets),
code:root_dir(),
get_node_info()]),
From ! {server_start_result, ok},
proxy_loop(Ref, CtrlNode);
Error ->
?INFO("server start failed"
"~n Error: ~p", [Error]),
From ! {server_start_result, Error},
halt()
end;
{nodedown, CtrlNode} ->
?LOG("received nodedown for controller node - terminate", []),
halt();
{'DOWN', Ref, process, _, _} ->
?LOG("received DOWN message for controller - terminate", []),
%% The controller has terminated, time to die
halt()
end.
maybe_start_crypto_and_ssl(Config) ->
case lists:keysearch(socket_type, 1, Config) of
{value, {socket_type, SocketType}} when ((SocketType =:= ssl) orelse
(SocketType =:= ossl) orelse
(SocketType =:= essl)) ->
?LOG("maybe start crypto and ssl", []),
(catch crypto:start()),
ssl:start();
_ ->
ok
end.
get_node_info() ->
[{cpu_topology, erlang:system_info(cpu_topology)},
{heap_type, erlang:system_info(heap_type)},
{nof_schedulers, erlang:system_info(schedulers)},
{otp_release, erlang:system_info(otp_release)},
{version, erlang:system_info(version)},
{system_version, erlang:system_info(system_version)},
{system_architecture, erlang:system_info(system_architecture)}].
|
