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Add mdc support for default format

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This commit is contained in:
gabime 2024-03-29 17:04:53 +03:00
parent cba66029e2
commit 1253a57db6
2 changed files with 76 additions and 59 deletions
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45
include/spdlog/mdc.h
View File

@ -1,35 +1,34 @@
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#pragma once
#include <map>
#include <string>
namespace spdlog {
class mdc {
public:
using mdc_map_t = std::map<std::string, std::string>;
class mdc {
public:
static void put(const std::string &key, const std::string &value) {
get_context()[key] = value;
}
static std::string get(const std::string &key) {
auto &context = get_context();
auto it = context.find(key);
if (it != context.end()) {
return it->second;
static void put(const std::string &key, const std::string &value) {
get_context()[key] = value;
}
return "";
}
static void remove(const std::string &key) { get_context().erase(key); }
static std::string get(const std::string &key) {
auto &context = get_context();
auto it = context.find(key);
if (it != context.end()) {
return it->second;
}
return "";
}
static void clear() { get_context().clear(); }
static void remove(const std::string &key) { get_context().erase(key); }
static std::map<std::string, std::string> &get_context() {
static thread_local std::map<std::string, std::string> context;
return context;
}
};
static void clear() { get_context().clear(); }
static mdc_map_t &get_context() {
static thread_local mdc_map_t context;
return context;
}
};
} // namespace spdlog

88
include/spdlog/pattern_formatter-inl.h
View File

@ -784,6 +784,49 @@ private:
log_clock::time_point last_message_time_;
};
// Class for formatting Mapped Diagnostic Context (MDC) in log messages.
// Example: [logger-name] [info] [mdc_key_1:mdc_value_1 mdc_key_2:mdc_value_2] some message
template <typename ScopedPadder>
class mdc_formatter : public flag_formatter {
public:
explicit mdc_formatter(padding_info padinfo)
: flag_formatter(padinfo) {}
void format(const details::log_msg &, const std::tm &, memory_buf_t &dest) override {
auto &mdc_map = mdc::get_context();
if (mdc_map.empty()) {
ScopedPadder p(0, padinfo_, dest);
return;
} else {
format_mdc(mdc_map, dest);
}
}
void format_mdc(const mdc::mdc_map_t &mdc_map, memory_buf_t &dest){
auto last_element = --mdc_map.end();
for (auto it = mdc_map.begin(); it != mdc_map.end(); ++it) {
auto &pair = *it;
const auto &key = pair.first;
const auto &value = pair.second;
size_t content_size = key.size() + value.size() + 1; // 1 for ':'
if (it != last_element) {
content_size++; // 1 for ' '
}
ScopedPadder p(content_size, padinfo_, dest);
fmt_helper::append_string_view(key, dest);
fmt_helper::append_string_view(":", dest);
fmt_helper::append_string_view(value, dest);
if (it != last_element) {
fmt_helper::append_string_view(" ", dest);
}
}
}
};
// Full info formatter
// pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] [%s:%#] %v
class full_formatter final : public flag_formatter {
@ -859,6 +902,15 @@ public:
dest.push_back(']');
dest.push_back(' ');
}
// add mdc if present
auto &mdc_map = mdc::get_context();
if (!mdc_map.empty()) {
dest.push_back('[');
mdc_formatter_.format_mdc(mdc_map, dest);
dest.push_back(']');
dest.push_back(' ');
}
// fmt_helper::append_string_view(msg.msg(), dest);
fmt_helper::append_string_view(msg.payload, dest);
}
@ -866,44 +918,10 @@ public:
private:
std::chrono::seconds cache_timestamp_{0};
memory_buf_t cached_datetime_;
mdc_formatter<null_scoped_padder> mdc_formatter_{padding_info{}};
};
// Class for formatting Mapped Diagnostic Context (MDC) in log messages.
// Example: [logger-name] [info] [mdc_key_1:mdc_value_1 mdc_key_2:mdc_value_2] some message
template <typename ScopedPadder>
class mdc_formatter : public flag_formatter {
public:
explicit mdc_formatter(padding_info padinfo)
: flag_formatter(padinfo) {}
void format(const details::log_msg &, const std::tm &, memory_buf_t &dest) override {
auto &mdc_map = mdc::get_context();
if (mdc_map.empty()) {
ScopedPadder p(0, padinfo_, dest);
return;
} else {
auto last_element = --mdc_map.end();
for (auto it = mdc_map.begin(); it != mdc_map.end(); ++it) {
auto &pair = *it;
const auto &key = pair.first;
const auto &value = pair.second;
size_t content_size = key.size() + value.size() + 1; // 1 for ':'
if (it != last_element) {
content_size++; // 1 for ' '
}
ScopedPadder p(content_size, padinfo_, dest);
fmt_helper::append_string_view(key, dest);
fmt_helper::append_string_view(":", dest);
fmt_helper::append_string_view(value, dest);
if (it != last_element) {
fmt_helper::append_string_view(" ", dest);
}
}
}
}
};
} // namespace details