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
|
-- Prosody IM v0.4
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local pcall = pcall;
local config = require "core.configmanager";
local log_sources = config.get("*", "core", "log_sources");
local find = string.find;
local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;
module "logger"
local name_sinks, level_sinks = {}, {};
local name_patterns = {};
-- Weak-keyed so that loggers are collected
local modify_hooks = setmetatable({}, { __mode = "k" });
local make_logger;
local outfunction = nil;
function init(name)
if log_sources then
local log_this = false;
for _, source in ipairs(log_sources) do
if find(name, source) then
log_this = true;
break;
end
end
if not log_this then return function () end end
end
local log_debug = make_logger(name, "debug");
local log_info = make_logger(name, "info");
local log_warn = make_logger(name, "warn");
local log_error = make_logger(name, "error");
--name = nil; -- While this line is not commented, will automatically fill in file/line number info
local namelen = #name;
return function (level, message, ...)
if outfunction then return outfunction(name, level, message, ...); end
if level == "debug" then
return log_debug(message, ...);
elseif level == "info" then
return log_info(message, ...);
elseif level == "warn" then
return log_warn(message, ...);
elseif level == "error" then
return log_error(message, ...);
end
end
end
function make_logger(source_name, level)
local level_handlers = level_sinks[level];
if not level_handlers then
level_handlers = {};
level_sinks[level] = level_handlers;
end
local source_handlers = name_sinks[source_name];
-- All your premature optimisation is belong to me!
local num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers;
local logger = function (message, ...)
if source_handlers then
for i = 1,num_source_handlers do
if source_handlers[i](source_name, level, message, ...) == false then
return;
end
end
end
for i = 1,num_level_handlers do
level_handlers[i](source_name, level, message, ...);
end
end
-- To make sure our cached lengths stay in sync with reality
modify_hooks[logger] = function () num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers; end;
return logger;
end
function setwriter(f)
local old_func = outfunction;
if not f then outfunction = nil; return true, old_func; end
local ok, ret = pcall(f, "logger", "info", "Switched logging output successfully");
if ok then
outfunction = f;
ret = old_func;
end
return ok, ret;
end
function add_level_sink(level, sink_function)
if not level_sinks[level] then
level_sinks[level] = { sink_function };
else
level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
end
for _, modify_hook in pairs(modify_hooks) do
modify_hook();
end
end
function add_name_sink(name, sink_function, exclusive)
if not name_sinks[name] then
name_sinks[name] = { sink_function };
else
name_sinks[name][#name_sinks[name] + 1] = sink_function;
end
for _, modify_hook in pairs(modify_hooks) do
modify_hook();
end
end
function add_name_pattern_sink(name_pattern, sink_function, exclusive)
if not name_patterns[name_pattern] then
name_patterns[name_pattern] = { sink_function };
else
name_patterns[name_pattern][#name_patterns[name_pattern] + 1] = sink_function;
end
end
_M.new = make_logger;
return _M;
|
