rust log选型

考察了最火的tracing。但是该模块不支持compact，仅支持根据时间进行rotate。

• daily

  Creates a daily-rotating file appender.

• hourly

  Creates an hourly-rotating file appender.

• minutely

  Creates a minutely-rotating file appender. This will rotate the log file once per minute.

• never

  Creates a non-rolling file appender.

这两点实在在工程上难以使用。因此选择了flexi_logger.该支持的都支持了。将配置如下。 

文档：flexi_logger::code_examples - Rust

flexi_logger::code_examples - Rust

use std::backtrace::Backtrace;
use std::{panic, thread};
use std::thread::sleep;
use std::time::Duration;
use anyhow::anyhow;
use flexi_logger::{writers::FileLogWriter, Cleanup, Criterion, FileSpec, Naming, WriteMode, Age};
use log;
use log::info;
use tracing::instrument;

fn panic_hook(){
    panic::set_hook(Box::new(|_| {
        log::error!("{:?}",anyhow!("panic found:"));
    }));
}
fn test(){
    info!("hello2");
}

fn main() {
    panic_hook();
    let logger = flexi_logger::Logger::try_with_str("info").unwrap()
        .log_to_file(
            FileSpec::default()
                .basename("calculate")
                .directory("./logs")
        ).append().write_mode(WriteMode::Async).rotate(
        Criterion::AgeOrSize(Age::Day,500 * 1024 * 1024), // 每天轮转一次日志
        Naming::Timestamps,
        Cleanup::KeepLogAndCompressedFiles(1,30), // 保留7天的日志
    ).format(flexi_logger::opt_format)
        .start();
    test();

}