How to make logging asynchronous

[Vasavi Kaza]

Hi,

Created a custom winston logger. It works fine logging to console and file. However, all my log messages are printed once at the beginning of the code instead of wating step by step to execute. Especially, these print the log statements farther in the code than the failed statement that ends the program. How do I fix this.  Could not find how to resolve this. New to nodejs and in learning process. May be a silly question but please help. 

Thanks,

Vasavi Kaza

[Paul Spaulding]

Tough to say without seeing code, but it sounds like this sort of thing:

logger.info('msg1'); // this gets logged 1st
someAsyncFunc(function(){ // callback
l
});
logger.info('msg2');  //this gets logged 2nd

[Peter Ferak]

Depends mostly on how you write your javascript code. Can you give some samples?

One way to solve it is to use the synchronous methods, which are provided by most node modules (instead of their async counterparts using callbacks). 

Good luck.

[Ezequiel Carrizo]

as @Peter Ferak pointed, it depends on your code, you should read the basics about JavaScript and Asynchronous vs synchronous execution.

A working example so you can see how it really works.

console.log('calling some async function');

setTimeout(function(){
    console.log('Async function 1 finished');
},4);


console.log('calling some async function 2');

setTimeout(function(){
    console.log('Async function 2 finished');
},2);

See it working: https://jsfiddle.net/2x5oLx51/