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//! All features are described in one copy and paste.
use casual_logger::{Extension, Level, Log, Table};
fn main() {
// Example of Log file name:
//
// 'tic-tac-toe-2020-07-11.log.toml'
// -----------
// Prefix -----------
// StartDate ----
// Suffix
// -----
// Extention
//
// - StartDate is automatically added.
//
// Set the prefix with 'set_file_name' method.
Log::set_file_name("tic-tac-toe");
// Log file extension.
//
// '.log.toml' or '.log'.
// '.log' for safety, include a word that
// clearly states that you can delete the file.
// If you don't like the .toml extension, change.
Log::set_file_ext(Extension::LogToml);
// Logs with lower priority than this level will not
// be written.
//
// |<-- Low Level --------------------- High level -->|
// |<-- High priority --------------- Low priority -->|
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
Log::set_level(Level::Trace);
// Remove old log files. This is determined by the
// StartDate in the filename.
Log::set_retention_days(2);
// Wait for seconds logging to complete.
// By default it's set to 30 seconds,
// so you probably don't need to set it.
Log::set_timeout_secs(30);
// Set to true to allow Casual_logger to
// output information to stdout and stderr.
// By default it's set to false,
// so you probably don't need to set it.
Log::set_development(true);
// Remove old log files. This is determined by the
// StartDate in the filename.
Log::remove_old_logs();
// Multi-line string.
// The suffix "ln" adds a newline at the end.
Log::infoln(
"Hello, world!!
こんにちわ、世界！！",
);
// After explicitly checking the level.
if Log::enabled(Level::Info) {
let x = 100; // Time-consuming preparation, here.
Log::infoln(&format!("x is {}.", x));
}
// The level is implicitly confirmed.
Log::trace("( 1)TRACE");
Log::traceln("( 2)trace-line");
Log::debug("( 3)DEBUG");
Log::debugln("( 4)debug-line");
Log::info("( 5)INFO");
Log::infoln("( 6)info-line");
Log::notice("( 7)NOTICE");
Log::noticeln("( 8)notice-line");
Log::warn("( 9)WARN");
Log::warnln("(10)warn-line");
Log::error("(11)ERROR");
Log::errorln("(12)error-line");
Log::fatal("(13)FATAL");
Log::fatalln("(14)fatal-line");
// Fatal is Panic! Can be used as the first argument of.
// panic!(Log::fatal(&format!("Invalid number=|{}|", 99)));
// Suffix '_t'. TOML say a table. So-called map.
Log::infoln_t(
"The sky is from top to bottom!!
上から下まで空です！！",
Table::default()
.str(
// Do not include spaces in your key.
"ABird",
"fly in the sky.",
)
// Not enclose this value in quotation marks.
.literal("NumberOfSwimmingFish", "2")
.str(
"ThreeMonkeys",
"climb
a tall
tree.",
),
);
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | *****|
Log::set_level(Level::Trace);
Log::trace("(7)Trace on (7)Trace.");
Log::debug("(6)Debug on (7)Trace.");
Log::info("(5)Info on (7)Trace.");
Log::notice("(4)Notice on (7)Trace.");
Log::warn("(3)Warn on (7)Trace.");
Log::error("(2)Error on (7)Trace.");
Log::fatal("(1)Fatal on (7)Trace.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | ***** |
Log::set_level(Level::Debug);
Log::trace("(7)Trace on (6)debug. Skip!");
Log::debug("(6)Debug on (6)debug.");
Log::info("(5)Info on (6)debug.");
Log::notice("(4)Notice on (6)debug.");
Log::warn("(3)Warn on (6)debug.");
Log::error("(2)Error on (6)debug.");
Log::fatal("(1)Fatal on (6)debug.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | ***** |
Log::set_level(Level::Info);
Log::trace("(7)Trace on (5)Info. Skip!");
Log::debug("(6)Debug on (5)Info. Skip!");
Log::info("(5)Info on (5)Info.");
Log::notice("(4)Notice on (5)Info.");
Log::warn("(3)Warn on (5)Info.");
Log::error("(2)Error on (5)Info.");
Log::fatal("(1)Fatal on (5)Info.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | ****** |
Log::set_level(Level::Notice);
Log::trace("(7)Trace on (4)Notice. Skip!");
Log::debug("(6)Debug on (4)Notice. Skip!");
Log::info("(5)Info on (4)Notice. Skip!");
Log::notice("(4)Notice on (4)Notice.");
Log::warn("(3)Warn on (4)Notice.");
Log::error("(2)Error on (4)Notice.");
Log::fatal("(1)Fatal on (4)Notice.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | **** |
Log::set_level(Level::Warn);
Log::trace("(7)Trace on (3)Warn. Skip!");
Log::debug("(6)Debug on (3)Warn. Skip!");
Log::info("(5)Info on (3)Warn. Skip!");
Log::notice("(4)Notice on (3)Warn. Skip!");
Log::warn("(3)Warn on (3)Warn.");
Log::error("(2)Error on (3)Warn.");
Log::fatal("(1)Fatal on (3)Warn.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// | ***** |
Log::set_level(Level::Error);
Log::trace("(7)Trace on (2)Error. Skip!");
Log::debug("(6)Debug on (2)Error. Skip!");
Log::info("(5)Info on (2)Error. Skip!");
Log::notice("(4)Notice on (2)Error. Skip!");
Log::warn("(3)Warn on (2)Error. Skip!");
Log::error("(2)Error on (2)Error.");
Log::fatal("(1)Fatal on (2)Error.");
// |Fatal< Error < Warn < Notice < Info < Debug <Trace|
// |***** |
Log::set_level(Level::Fatal);
Log::trace("(7)Trace on (1)Fatal. Skip!");
Log::debug("(6)Debug on (1)Fatal. Skip!");
Log::info("(5)Info on (1)Fatal. Skip!");
Log::notice("(4)Notice on (1)Fatal. Skip!");
Log::warn("(3)Warn on (1)Fatal. Skip!");
Log::error("(2)Error on (1)Fatal. Skip!");
Log::fatal("(1)Fatal on (1)Fatal.");
// Wait for logging to complete or to timeout.
Log::wait();
}