log-err

Light weight logging module for nodejs

Installation

$ npm install log-err

Usage

Load the module

var logerr = require('log-err');

After the module has been loaded, next step is to set the path of the logger file that will contain api and module info for logging.

Set the path

logerr.setPath(path);

Logging levels

Open your logger file after it has been created. This file will export an object which has the following structure.

module.exports = {
    moduleInfo : {
        apiInfo : {
            trace     : 0,
            error     : 0,
            request   : 0,
            response  : 0,
            query     : 0
        }
    }
};

moduleInfo is the file/module where your api function is residing. apiInfo is the name of the api function.

For example:

If you have an api to send a post request to any server.

Lets say we have an end point : /send_post_request So, we create a file/module : externalRequests.js Now this file has our api function as below :

exports.sendPostRequest = sendPostRequest

function sendPostRequest{

}

Here, moduleInfo = externalRequests and apiInfo = sendPostRequest

Lets start logging

First of all, you need to create an object in each api function and pass it to the logger functions.

Lets say the we declare an object named loggingInfo.

exports.sendPostRequest = sendPostRequest
function sendPostRequest{
  var loggingInfo = {
    moduleInfo : "externalRequests",
    apiInfo    : "sendPostRequest"
  }
}

Accordingly, your logger file will have following object details,

module.exports = {
    externalRequests : {
        sendPostRequest : {
            trace     : 0,
            error     : 0,
            request   : 0,
            response  : 0,
            query     : 0
        }
    }
};

To start logging, call any of the following functions depending upon their trace level,

logger.trace(loggingInfo, object, object, object);

logger.error(loggingInfo, object, object, object);

logger.request(loggingInfo, object, object, object);

logger.response(loggingInfo, object, object, object);

logger.query(loggingInfo, object, object, object);

Note : The number of arguments that you are passing to the logging functions may vary.

Enable/Disable logging

To enable or disable logging just toggle the logging level flag according to your need in the logger file for any module and api info you like.

LICENSE

Released under MIT.