Crate logging

A logging fascility inspired by the python logging framework.

This library implements named herachical loggers which have message handlers associated with them.

The framework is intended more for people who want to set log levels for there application without the need to recompile the software.

features

• Thread safe.
• Easy to extend.
• Log handlers can be added and removed at runtime.
• Log levels can be changed at runtime.

behavior

• Via default there is no log handler added.
• The default log level of all loggers is DEFAULT.
• Log messages bubble up to their parents and will be logged by all intermediate handlers.

usage

extern crate logging;

use std::sync::Arc;

struct MyOwnHandler {}

impl logging::Handler for MyOwnHandler {
  fn emit(&self, msg: &logging::Message) {
    print!("{:7} | {}", msg.name, msg.msg);
  }
}

fn main() {
  // you will see nothing, because no handler added yet
  logging::debug("app started");

  logging::root().add_handler(Arc::new(Box::new(MyOwnHandler {})));

  let log = logging::get("myapp");
  log.add_handler(logging::ConsoleHandler::new());

  // will be printed by both handlers
  log.info("created".to_owned());
  {
    let sub_log = logging::get("myapp.special");
    sub_log.debug("some other stuff");
  }

  log.level = logging::Level::WARN;
  // will not be printed by the handler of `myapp`.
  log.info("unly plain not in color");
}

Structs

ConsoleHandler

Colorfull console logging

FileHandler

Logging to a file

Message

A message to be logged.

_Logger

A logger node.

Enums

Level

The aviable logging levels.

Traits

Handler

Handels an emitted message.

Functions

debug

Convenient debug log to the root logger.

error

Convenient error log to the root logger.

fatal

Convenient fatal log to the root logger.

get

Gets a Logger instance by it’s name.

info

Convenient info log to the root logger.

root

Gets the root logger.

warn

Convenient warn log to the root logger.

Type Aliases

Logger

A logger instance.