logger

Logger is a rust crate for printing structured log messages into the standard output.

Example

The following example creates a logger facility with one required field, i.e., a field that will be printed in all messages.

extern crate logger;

use logger::builder::LoggerBuilder;
use logger::fields::FieldValue;

fn main() {
    let log = LoggerBuilder::default()
        .with_field("name", FieldValue::String("alert".to_string()))
        .build();

    log.info("Starting");
    log.debugf("Just a debug message", logger::fields!{
        "level" => FieldValue::String("critical".to_string()),
    });
}

This will output the following:

2021-12-27 11:56:28.282117 -03:00	INFO	Starting	{"name":"alert","local.ts":1640616988,"local.ts_ms":1640616988282}
2021-12-27 11:56:28.283648 -03:00	DEBUG	Just a debug message	{"name":"alert","local.ts":1640616988,"local.ts_ms":1640616988283,"level":"critical"

Features

Logger supports categorizing messages in some levels. Also, when choosing Local or Test environments, it uses different colors on the level information.

The current supported levels (and their terminal colors) are the following:

• Debug (green)
• Info (blue)
• Warning (yellow)
• Error (red)