CODEWITHSUNDEEP
javascripttypescriptprotractorlog4js-node
anuvrat singh
anuvrat singh

Reputation: 421

How to log the Console logs into the file using log4js

I want to log the console logs whether the expect failing or any exception coming into the log file. How can i do that without using try and catch. In LOG4j for java there is rootlogger which automatically logs all the system information logs into the file. Can same be done for log4JS for javascript 

log4js.configure({
  appenders: [
    {
      type: "clustered",
      appenders: [
        {
          type: "dateFile",
          filename: "log/access.log",
          pattern: "-yyyy-MM-dd",
          category: "http"
        },
        {
          type: "file",
          filename: "log/app.log",
          maxLogSize: 10485760,
          numBackups: 3
        },
        {
          type: "logLevelFilter",
          level: "ERROR",
          appender: {
            type: "file",
            filename: "log/errors.log"
          }
        }
      ]
    }
  ]
})

Upvotes: 2

Views: 5556

Answers (1)

basarat
basarat

Reputation: 275947

You can override the default console.log functions to point to your logger e.g. 

const logger = log4js.getLogger('cheese');
console.log = (msg) => logger.trace(msg);

You can do similar things for other functions e.g. console.debug etc.

That said. You would be better off calling logger explicitly.

Upvotes: 5

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