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futurosenso-log

v1.2.1

Published

Logging utility. You get a logger that adds a log to a file and to the console. A new file is created if the day has changed. The log files are organized in folders by year and month.

Downloads

7

Readme

Small logging utility

You get a logger that adds a log to a file and to the console.

A new file is created automatically if the day has changed.

The log files are organized in folders by year and month.

This logging mechanism used synchronized functions when writing to the log file.

Usage example

const logger = require("futurosenso-log");

logger.log("This is a test");

If today is the 6th of March 2019, a record is added to the file with path logs/2019/03/2019-03-06.log in the current directory of the application.

The record starts with the GMT time when the log was called including millisec.

14:19:38.145 GMT - This is a test

An output to the standard console is also done and also includes the time:

14:19:38.145 GMT: This is a test

Automatic log file creation

When a log is made, the creation of the log file is automatic depending on the current date. If no log is made during the current day then no log file is created for that day.

...
logs/2019/03/2019-03-01.log
logs/2019/03/2019-03-03.log
...
logs/2019/03/2019-03-06.log

Forking of standard output 'stdout' and standard error 'stderr'

logger.forkStdOut();

After calling logger.forkStdOut(), every message passed to console.log() will also be added to the log file.

logger.forkStdError();
    

After calling logger.forkStdError(), every message passed to console.error() will also be added to the log file.

14:06:52.763 GMT - stderr - forking test to stderr and log file

Redirection of process.stderr.write

logger.redirectStdError();
        

Every call to process.stderr.write will be directly redirected to the log file and the console standard output.

    14:06:52.763 GMT - stderr - redirection test to stderr.write