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node.jswinston

how to add callback to logger of winston node module?

I am using winston node module(here). 

var path = '/logs/mylog.log'
var logger = new(winston.Logger)({
  transports: [
    new (winston.transports.Console)(),
    new (winston.transports.File)({ filename: path})
  ]
});

My problem is that, I want to do some coding just after saving this file but i am not getting how can i add the callback function which will execute just after saving log file. I tried to do:

var logger = new(winston.Logger)({
  transports: [
    new (winston.transports.Console)(),
    new (winston.transports.File)({ filename: path},function(){

    })
  ]
});

but nothing is happening. Can anyone help me?

Solution

  • You can use the logging event for that:

    logger.on('logging', function(transport) {
  // check if this was the `File` transport
  if (transport.name === 'file') {
    console.log('logged a message to', transport.filename);
  }
});