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