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@imcooder/node-logger

v2.0.10

Published

node logger

Downloads

21

Readme

node-logger

node上日志输出库,目标是轻量 性能要优于log4js

NPM version npm download David deps

changelog

  • 20200118
  • stream出现异常后 继续写入 会导致进入缓存 内存泄露, 修改方案:捕捉异常 关闭stream释放资源 同时锁定创建60s 防止连续创建导致异常

使用

安装

npm install @imcooder/node-logger --save

配置

配置说明

let config = {
    main: { // app名字 最终也落到日志格式中 以支持多个文件输出
        'log_file': path.join(logDir, './node.log'), // 日志文件名字, 不配置 则无文件日志输出
        "time_format": "%F %T.%L", // 日志行中时间格式
        "auto_rotate": true, // 日志文件自动切分 切分格式为文件名称后 .%Y%m%d%H
        "level": "INFO", // 大于等于该级别的才可以输出
        "console": true // 是否同时输出到console中
    }
    "replaceConsole": true // 系统console日志也按照该格式输出 但不落日志文件
};

time_format格式参考:https://github.com/samsonjs/strftime

  • 日志级别 日志级别 从小到大依次为:DEBUG、TRACE、INFO、WARN、ERROR

使用方法

  • 配置
let nodeLogger = require('@baidu/node-logger');
const path = require('path');
let logDir = path.join(__dirname, '../log');
let config = {
    main: {
        'log_file': path.join(logDir, './node.log'),
        "time_format": "%F %T.%L",
        "auto_rotate": true,
        "level": "INFO",
        "console": true
    },
    trace: {
        "time_format": "%F %T.%L",
        'log_file': path.join(logDir, './trace.log'),
        "auto_rotate": true,
        "level": "debug",
        "console": true
    },
    "replaceConsole": true
};
nodeLogger.configure(config);
  • 普通日志输出,每次都会执行输出
let logger = nodeLogger.getLogger('main');

logger.debug('debug');
logger.trace('trace');
logger.info('info');
logger.notice('notice');
logger.log('log');
logger.warn('warn');
logger.error('error');
logger.fatal('fatal');
logger.debug('logid:%s main:%s config:%j', i, { a: 1 }, config);
  • 多次收集 最后输出 适用于一条请求一条访问日志
let tracer = nodeLogger.create('main', '_1111_'); // 参数1 对应日志配置 参数2: logid
tracer.debug('test_tracer');
tracer.gather('request', {}); // 收集
tracer.gather('response', {}); // 收集

tracer.dumps(); // 最终info级别输出

// 也可以使用其他日志输出函数 这样就不用再次输入logid了  这样每次调用都会输出

tracer.debug('test debug');
tracer.log('log');
tracer.warn('warn');
tracer.error('error');
tracer.fatal('fatal');