log.cpp 3.62 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
/** Logging and debugging routines
 *
 * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
 * @copyright 2017-2018, Institute for Automation of Complex Power Systems, EONERC
 * @license GNU General Public License (version 3)
 *
 * VILLAScommon
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************************/

23
24
25
#include <list>
#include <algorithm>

26
27
28
29
30
31
32
33
34
35
36
37
#include <spdlog/sinks/stdout_color_sinks.h>
#include <spdlog/sinks/syslog_sink.h>
#include <spdlog/sinks/basic_file_sink.h>

#include <villas/log.hpp>
#include <villas/exceptions.hpp>

using namespace villas;

/** The global log instance */
Log villas::logging;

38
Log::Log(Level level)
39
40
41
42
43
{
	char *p = getenv("VILLAS_LOG_PREFIX");
	if (p)
		prefix = p;

44
45
	setLevel(level);
	setPattern("%H:%M:%S %^%l%$ %n: %v");
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

	auto sink = std::make_shared<spdlog::sinks::stderr_color_sink_mt>();

	sink->set_pattern(prefix + pattern);
	sinks->add_sink(sink);
}

int Log::getWidth()
{
	int width = Terminal::getCols() - 25;

	if (!prefix.empty())
		width -= prefix.length();

	return width;
}

Logger Log::get(const std::string &name)
{
	auto logger = spdlog::get(name);

	if (not logger)
		logger = std::make_shared<Logger::element_type>(name, sinks);

	return logger;
}

void Log::parse(json_t *cfg)
{
	const char *level = NULL;
	const char *path = NULL;
	const char *pattern = NULL;

	int syslog;
	int ret;

	json_error_t err;
	json_t *json_expressions;

	ret = json_unpack_ex(cfg, &err, 0, "{ s?: s, s?: s, s?: s, s?: b, s?: s }",
		"level", &level,
		"file", &path,
		"expressions", &json_expressions,
		"syslog", &syslog,
		"pattern", &pattern
	);
	if (ret)
		throw new JsonError(err);

	if (level)
		setLevel(level);

	if (path) {
		auto sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(path);

		sinks->add_sink(sink);
	}

	if (syslog) {
		auto sink = std::make_shared<spdlog::sinks::syslog_sink_mt>("villas", LOG_PID, LOG_DAEMON);

		sinks->add_sink(sink);
	}

	if (json_expressions) {
		if (!json_is_array(json_expressions))
			throw new ConfigError(json_expressions, "node-config.html#node-config-logging-expressions", "The 'expressions' setting must be a list of objects.");

		size_t i;
		json_t *json_expression;
		json_array_foreach(json_expressions, i, json_expression) {
			const char *name;
			const char *lvl;

			ret = json_unpack_ex(json_expression, &err, 0, "{ s: s, s: s }",
				"name", &name,
				"level", &lvl
			);
			if (ret)
				throw new JsonError(err);

			auto logger = get(name);
			auto level = spdlog::level::from_str(lvl);

			logger->set_level(level);
		}
	}
}

Steffen Vogel's avatar
Steffen Vogel committed
135
136
137
138
139
140
141
void Log::setPattern(const std::string &pat)
{
	pattern = pat;

	spdlog::set_pattern(pattern, spdlog::pattern_time_type::utc);
}

142
143
void Log::setLevel(Level lvl)
{
144
145
	level = lvl;

146
147
148
149
150
	spdlog::set_level(lvl);
}

void Log::setLevel(const std::string &lvl)
{
151
152
153
154
155
156
	std::list<std::string> l = SPDLOG_LEVEL_NAMES;

	auto it = std::find(l.begin(), l.end(), lvl);
	if (it == l.end())
		throw RuntimeError("Invalid log level {}", lvl);

157
	setLevel(spdlog::level::from_str(lvl));
158
159
}

Steffen Vogel's avatar
Steffen Vogel committed
160
161
162
163
Log::Level Log::getLevel() const
{
	return level;
}