WSyslog

new WSyslog(optopt) → {Object}

Description:

• 輸出log

Source:

• WSyslog.mjs, line 56

Example

import fs from 'fs'
import _ from 'lodash-es'
import w from 'wsemi'
import WSyslog from './src/WSyslog.mjs'

w.fsCleanFolder('./_logs')

let log = WSyslog()
log.info({ event: 'runner', msg: 'start' })
log.warn({ event: 'monitor-memory', msg: 'usage-high', ratio: 85.4 })
log.error({ event: 'crash', msg: 'db connection', code: 500 })

await log.clear() //顯式關閉, flush殘餘log並終止transport worker, 之後不可再呼叫log方法

let vpfs = w.fsTreeFolder('./_logs')
// console.log('vpfs', vpfs)

let fp = _.get(vpfs, `0.path`, '')

let jj = fs.readFileSync(fp, 'utf8')
console.log(jj)
// {"level":30,"time":1751780174415,"pid":24144,"hostname":"DESKTOP-6R7USAO","event":"runner","msg":"start"}
// {"level":40,"time":1751780174415,"pid":24144,"hostname":"DESKTOP-6R7USAO","event":"monitor-memory","msg":"usage-high"}
// {"level":50,"time":1751780174415,"pid":24144,"hostname":"DESKTOP-6R7USAO","event":"crash","msg":"db connection","code":500}

Parameters:

Name	Type	Attributes	Default	Description
opt	Object	<optional>	{}	輸入設定物件，預設{} Properties Name Type Attributes Default Description fdLog String <optional> './_logs' 輸入儲存log資料夾字串，預設'./_logs' interval String <optional> 'day' 輸入儲存log時分檔模式字串，可選'day'、'hr'，分別代表每日或每時分檔，預設'day' timeZone String <optional> null 輸入時區字串（IANA格式如'Asia/Taipei'、'UTC'），用於決定切檔邊界與檔名，預設null代表使用系統時區 numKeep Number <optional> 輸入保留log檔案數量整數，超出最舊檔將被自動刪除，預設於day模式為365、hr模式為365*24（約等同保留一年）

Returns:

Type

Object