log2 is an out-of-the-box logging library for Rust. It writes to stdout or to file asynchronousely,
and automatically rotates based on file size.
cargo add log2
Simple to start.
use log2::*;
fn main() {
let _log2 = log2::start();
trace!("send order request to server");
debug!("receive order response");
info!("order was executed");
warn!("network speed is slow");
error!("network connection was broken");
}Output
Show module path, and set log level.
use log2::*;
fn main() {
let _log2 = log2::stdout()
.module(false)
.level("info")
.start();
trace!("send order request to server");
debug!("receive order response");
info!("order was executed");
warn!("network speed is slow");
error!("network connection was broken");
}log2 with default file size 100MB, max file count 10, you can change as you like. Note the _log2 will
stop the log2 instance when it is out of the scope
use log2::*;
fn main() {
// configurable way:
// - log to file, file size: 100 MB, rotate: 20
// - tee to stdout
// - show module path, default is true
let _log2 = log2::open("log.txt")
.size(100*1024*1024)
.rotate(20)
.tee(true)
.module(true)
.start();
// out-of-the-box way
// let _log2 = log2::open("log.txt").start();
trace!("send order request to server");
debug!("receive order response");
info!("order was executed");
warn!("network speed is slow");
error!("network connection was broken");
}Output files
log.txt
log.1.txt
log.2.txt
log.3.txt
log.4.txt
log.5.txt
log.6.txt
log.7.txt
log.8.txt
log.9.txt
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