Package Exports

log-tracer

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (log-tracer) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

log-tracer

lightweight logger for node.js heavily inspired by log and rotating-file-stream

Features

default file output
optional console output
file rotation support
log reader support
cluster mode support

Usage

install

npm i log-tracer --save

import

//default options, 'debug' level
var log = require('log-tracer')()

//levelStr option. 
var log = require('log-tracer')('info') //statement level under 'info' will be ignored.
log.info('info message')   //record normally
log.debug('debug message') //would not be recorded

//details with an object options
var log = require('log-tracer')({
    levelStr: 'error',
    enableConsole: true
})

arguments

levelStr {String} debug default

Details with an object which have following attributes:

logName {String} default trace.log
path {String} parent dir of the logfiles, recommend an absolue path. default ./trace
size {String} rotation size for the file. default 20M
maxFiles {Number} max number of files to be stored. default 10
history {String} history file name for rotation. default ${logName}.txt
enableConsole {Boolean} enable console output. default false
reader {Boolean} read log from file. default false

Exapmle

//logger
var log = require('log-tracer')();
log.debug('debug message');
log.info('info message');
log.error('error message');

//reader
var log = require('log-tracer')({reader: true});
log.on('line', (data)=>{
    console.log(data)
})

log levels

0 EMERGENCY system is unusable
1 ALERT action must be taken immediately
2 CRITICAL the system is in critical condition
3 ERROR error condition
4 WARNING warning condition
5 NOTICE a normal but significant condition
6 INFO a purely informational message
7 DEBUG messages to debug an application

License

MIT