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Added Mapped Diagnostic Context (MDC) support (#2907)

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* Added Mapped Diagnostic Context (MDC) support

* Update include statement

* Optimize string creation

* Fix includes

* Fix padding rules in mdc empty case

* Add comment to describe the use of mdc formatter
This commit is contained in:
Massimiliano Riva
2024-03-18 16:41:46 +01:00
committed by GitHub
parent 23587b0d9a
commit d03eb40c17
4 changed files with 202 additions and 0 deletions
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128
tests/test_pattern_formatter.cpp
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@@ -500,3 +500,131 @@ TEST_CASE("override need_localtime", "[pattern_formatter]") {
REQUIRE(to_string_view(formatted) == oss.str());
}
}
TEST_CASE("mdc formatter test-1", "[pattern_formatter]") {
spdlog::mdc::put("mdc_key_1", "mdc_value_1");
spdlog::mdc::put("mdc_key_2", "mdc_value_2");
auto formatter = std::make_shared<spdlog::pattern_formatter>();
formatter->set_pattern("[%n] [%l] [%&] %v");
memory_buf_t formatted;
spdlog::details::log_msg msg(spdlog::source_loc{}, "logger-name", spdlog::level::info,
"some message");
formatter->format(msg, formatted);
auto expected = spdlog::fmt_lib::format(
"[logger-name] [info] [mdc_key_1:mdc_value_1 mdc_key_2:mdc_value_2] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted) == expected);
SECTION("Tear down") { spdlog::mdc::clear(); }
}
TEST_CASE("mdc formatter value update", "[pattern_formatter]") {
spdlog::mdc::put("mdc_key_1", "mdc_value_1");
spdlog::mdc::put("mdc_key_2", "mdc_value_2");
auto formatter = std::make_shared<spdlog::pattern_formatter>();
formatter->set_pattern("[%n] [%l] [%&] %v");
memory_buf_t formatted_1;
spdlog::details::log_msg msg(spdlog::source_loc{}, "logger-name", spdlog::level::info,
"some message");
formatter->format(msg, formatted_1);
auto expected = spdlog::fmt_lib::format(
"[logger-name] [info] [mdc_key_1:mdc_value_1 mdc_key_2:mdc_value_2] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted_1) == expected);
spdlog::mdc::put("mdc_key_1", "new_mdc_value_1");
memory_buf_t formatted_2;
formatter->format(msg, formatted_2);
expected = spdlog::fmt_lib::format(
"[logger-name] [info] [mdc_key_1:new_mdc_value_1 mdc_key_2:mdc_value_2] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted_2) == expected);
SECTION("Tear down") { spdlog::mdc::clear(); }
}
TEST_CASE("mdc different threads", "[pattern_formatter]") {
auto formatter = std::make_shared<spdlog::pattern_formatter>();
formatter->set_pattern("[%n] [%l] [%&] %v");
spdlog::details::log_msg msg(spdlog::source_loc{}, "logger-name", spdlog::level::info,
"some message");
memory_buf_t formatted_2;
auto lambda_1 = [formatter, msg]() {
spdlog::mdc::put("mdc_key", "thread_1_id");
memory_buf_t formatted;
formatter->format(msg, formatted);
auto expected =
spdlog::fmt_lib::format("[logger-name] [info] [mdc_key:thread_1_id] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted) == expected);
};
auto lambda_2 = [formatter, msg]() {
spdlog::mdc::put("mdc_key", "thread_2_id");
memory_buf_t formatted;
formatter->format(msg, formatted);
auto expected =
spdlog::fmt_lib::format("[logger-name] [info] [mdc_key:thread_2_id] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted) == expected);
};
std::thread thread_1(lambda_1);
std::thread thread_2(lambda_2);
thread_1.join();
thread_2.join();
SECTION("Tear down") { spdlog::mdc::clear(); }
}
TEST_CASE("mdc remove key", "[pattern_formatter]") {
spdlog::mdc::put("mdc_key_1", "mdc_value_1");
spdlog::mdc::put("mdc_key_2", "mdc_value_2");
spdlog::mdc::remove("mdc_key_1");
auto formatter = std::make_shared<spdlog::pattern_formatter>();
formatter->set_pattern("[%n] [%l] [%&] %v");
memory_buf_t formatted;
spdlog::details::log_msg msg(spdlog::source_loc{}, "logger-name", spdlog::level::info,
"some message");
formatter->format(msg, formatted);
auto expected =
spdlog::fmt_lib::format("[logger-name] [info] [mdc_key_2:mdc_value_2] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted) == expected);
SECTION("Tear down") { spdlog::mdc::clear(); }
}
TEST_CASE("mdc empty", "[pattern_formatter]") {
auto formatter = std::make_shared<spdlog::pattern_formatter>();
formatter->set_pattern("[%n] [%l] [%&] %v");
memory_buf_t formatted;
spdlog::details::log_msg msg(spdlog::source_loc{}, "logger-name", spdlog::level::info,
"some message");
formatter->format(msg, formatted);
auto expected = spdlog::fmt_lib::format("[logger-name] [info] [] some message{}",
spdlog::details::os::default_eol);
REQUIRE(to_string_view(formatted) == expected);
SECTION("Tear down") { spdlog::mdc::clear(); }
}