123 lines
2.6 KiB
Rust
123 lines
2.6 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
|
|
// This file is part of Parity.
|
|
|
|
// Parity is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Parity is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//! Common log helper functions
|
|
|
|
use std::env;
|
|
use rlog::LogLevelFilter;
|
|
use env_logger::LogBuilder;
|
|
use arrayvec::ArrayVec;
|
|
pub use ansi_term::{Colour, Style};
|
|
|
|
use parking_lot::{RwLock, RwLockReadGuard};
|
|
|
|
lazy_static! {
|
|
static ref LOG_DUMMY: bool = {
|
|
let mut builder = LogBuilder::new();
|
|
builder.filter(None, LogLevelFilter::Info);
|
|
|
|
if let Ok(log) = env::var("RUST_LOG") {
|
|
builder.parse(&log);
|
|
}
|
|
|
|
if builder.init().is_ok() {
|
|
println!("logger initialized");
|
|
}
|
|
true
|
|
};
|
|
}
|
|
|
|
/// Intialize log with default settings
|
|
pub fn init_log() {
|
|
let _ = *LOG_DUMMY;
|
|
}
|
|
|
|
const LOG_SIZE : usize = 128;
|
|
|
|
/// Logger implementation that keeps up to `LOG_SIZE` log elements.
|
|
pub struct RotatingLogger {
|
|
/// Defined logger levels
|
|
levels: String,
|
|
/// Logs array. Latest log is always at index 0
|
|
logs: RwLock<ArrayVec<[String; LOG_SIZE]>>,
|
|
}
|
|
|
|
impl RotatingLogger {
|
|
|
|
/// Creates new `RotatingLogger` with given levels.
|
|
/// It does not enforce levels - it's just read only.
|
|
pub fn new(levels: String) -> Self {
|
|
RotatingLogger {
|
|
levels: levels,
|
|
logs: RwLock::new(ArrayVec::<[_; LOG_SIZE]>::new()),
|
|
}
|
|
}
|
|
|
|
/// Append new log entry
|
|
pub fn append(&self, log: String) {
|
|
self.logs.write().insert(0, log);
|
|
}
|
|
|
|
/// Return levels
|
|
pub fn levels(&self) -> &str {
|
|
&self.levels
|
|
}
|
|
|
|
/// Return logs
|
|
pub fn logs(&self) -> RwLockReadGuard<ArrayVec<[String; LOG_SIZE]>> {
|
|
self.logs.read()
|
|
}
|
|
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use super::RotatingLogger;
|
|
|
|
fn logger() -> RotatingLogger {
|
|
RotatingLogger::new("test".to_owned())
|
|
}
|
|
|
|
#[test]
|
|
fn should_return_log_levels() {
|
|
// given
|
|
let logger = logger();
|
|
|
|
// when
|
|
let levels = logger.levels();
|
|
|
|
// then
|
|
assert_eq!(levels, "test");
|
|
}
|
|
|
|
#[test]
|
|
fn should_return_latest_logs() {
|
|
// given
|
|
let logger = logger();
|
|
|
|
// when
|
|
logger.append("a".to_owned());
|
|
logger.append("b".to_owned());
|
|
|
|
// then
|
|
let logs = logger.logs();
|
|
assert_eq!(logs[0], "b".to_owned());
|
|
assert_eq!(logs[1], "a".to_owned());
|
|
assert_eq!(logs.len(), 2);
|
|
}
|
|
}
|
|
|