-
Notifications
You must be signed in to change notification settings - Fork 411
/
log_exporter.cc
200 lines (164 loc) · 5.39 KB
/
log_exporter.cc
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
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#ifdef ENABLE_LOGS_PREVIEW
# include "opentelemetry/exporters/ostream/log_exporter.h"
# include <mutex>
# include "opentelemetry/sdk_config.h"
# include <iostream>
# include <type_traits>
namespace nostd = opentelemetry::nostd;
namespace sdklogs = opentelemetry::sdk::logs;
OPENTELEMETRY_BEGIN_NAMESPACE
namespace exporter
{
namespace logs
{
/*********************** Helper functions ************************/
/*
print_value is used to print out the value of an attribute within a vector.
These values are held in a variant which makes the process of printing them much more
complicated.
*/
template <typename T>
void print_value(const T &item, std::ostream &sout)
{
sout << item;
}
template <typename T>
void print_value(const std::vector<T> &vec, std::ostream &sout)
{
sout << '[';
size_t i = 1;
size_t sz = vec.size();
for (auto v : vec)
{
sout << v;
if (i != sz)
sout << ',' << ' ';
i++;
};
sout << ']';
}
// Prior to C++14, generic lambda is not available so fallback to functor.
# if __cplusplus < 201402L
class OwnedAttributeValueVisitor
{
public:
OwnedAttributeValueVisitor(std::ostream &sout) : sout_(sout) {}
template <typename T>
void operator()(T &&arg)
{
print_value(arg, sout_);
}
private:
// The OStream to send the logs to
std::ostream &sout_;
};
# endif
void print_value(sdk::common::OwnedAttributeValue &value, std::ostream &sout)
{
# if __cplusplus < 201402L
nostd::visit(OwnedAttributeValueVisitor(sout), value);
# else
nostd::visit([&sout](auto &&arg) { print_value(arg, sout); }, value);
# endif
}
void printMap(std::unordered_map<std::string, sdk::common::OwnedAttributeValue> map,
std::ostream &sout)
{
sout << "{";
size_t size = map.size();
size_t i = 1;
for (auto kv : map)
{
sout << "{" << kv.first << ": ";
print_value(kv.second, sout);
sout << "}";
if (i != size)
sout << ", ";
i++;
}
sout << "}";
}
/*********************** Constructor ***********************/
OStreamLogExporter::OStreamLogExporter(std::ostream &sout) noexcept : sout_(sout) {}
/*********************** Exporter methods ***********************/
std::unique_ptr<sdklogs::Recordable> OStreamLogExporter::MakeRecordable() noexcept
{
return std::unique_ptr<sdklogs::Recordable>(new sdklogs::LogRecord());
}
sdk::common::ExportResult OStreamLogExporter::Export(
const nostd::span<std::unique_ptr<sdklogs::Recordable>> &records) noexcept
{
if (isShutdown())
{
OTEL_INTERNAL_LOG_ERROR("[Ostream Log Exporter] Exporting "
<< records.size() << " log(s) failed, exporter is shutdown");
return sdk::common::ExportResult::kFailure;
}
for (auto &record : records)
{
// Convert recordable to a LogRecord so that the getters of the LogRecord can be used
auto log_record =
std::unique_ptr<sdklogs::LogRecord>(static_cast<sdklogs::LogRecord *>(record.release()));
if (log_record == nullptr)
{
// TODO: Log Internal SDK error "recordable data was lost"
continue;
}
// Convert trace, spanid, traceflags into exportable representation
constexpr int trace_id_len = 32;
constexpr int span_id__len = 16;
constexpr int trace_flags_len = 2;
char trace_id[trace_id_len] = {0};
char span_id[span_id__len] = {0};
char trace_flags[trace_flags_len] = {0};
log_record->GetTraceId().ToLowerBase16(trace_id);
log_record->GetSpanId().ToLowerBase16(span_id);
log_record->GetTraceFlags().ToLowerBase16(trace_flags);
// Print out each field of the log record, noting that severity is separated
// into severity_num and severity_text
sout_ << "{\n"
<< " timestamp : " << log_record->GetTimestamp().time_since_epoch().count() << "\n"
<< " severity_num : " << static_cast<int>(log_record->GetSeverity()) << "\n"
<< " severity_text : ";
int severity_index = static_cast<int>(log_record->GetSeverity());
if (severity_index < 0 ||
severity_index >= std::extent<decltype(opentelemetry::logs::SeverityNumToText)>::value)
{
sout_ << "Invalid severity(" << severity_index << ")\n";
}
else
{
sout_ << opentelemetry::logs::SeverityNumToText[severity_index] << "\n";
}
sout_ << " name : " << log_record->GetName() << "\n"
<< " body : " << log_record->GetBody() << "\n"
<< " resource : ";
printMap(log_record->GetResource().GetAttributes(), sout_);
sout_ << "\n"
<< " attributes : ";
printMap(log_record->GetAttributes(), sout_);
sout_ << "\n"
<< " trace_id : " << std::string(trace_id, trace_id_len) << "\n"
<< " span_id : " << std::string(span_id, span_id__len) << "\n"
<< " trace_flags : " << std::string(trace_flags, trace_flags_len) << "\n"
<< "}\n";
}
return sdk::common::ExportResult::kSuccess;
}
bool OStreamLogExporter::Shutdown(std::chrono::microseconds timeout) noexcept
{
const std::lock_guard<opentelemetry::common::SpinLockMutex> locked(lock_);
is_shutdown_ = true;
return true;
}
bool OStreamLogExporter::isShutdown() const noexcept
{
const std::lock_guard<opentelemetry::common::SpinLockMutex> locked(lock_);
return is_shutdown_;
}
} // namespace logs
} // namespace exporter
OPENTELEMETRY_END_NAMESPACE
#endif