Crate logging [−] [src]
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 Definitions
Logger |
A logger instance. |