Worker Utils

Starts workers with a set priority (to run background tasks or to respond in high urgency), with keepAlive option to restart failing processes.

Installation

npm install worker_utils --save

Usage

const 
    os = require('os'),
    WorkerUtils = require('./worker_utils.js');
 
var workerUtils = new WorkerUtils("Background Worker");
 
workerUtils.setVerbose(true);
 
workerUtils.run('./script_that_does_a_very_long_job.js', {
    verbose : true,
    priority : 10,// (below normal); ommit it and you will get normal
    //flags : '-c', //put here the flags you want passed to node
    argv : 'this_string_is_going_to_be_passed_as_an_argument', // the arguments string for you the child process
    keepAlive : true // if the process craches, should we restart it?
    //_restartLimit : 3, // this is the default restart limit (how many times)
    //_restartDelay : 50 // this is the default restart delay (how much delay between each time)
}, function(proc, restarts){
    if(proc){
        console.log('proccess started ' + proc.pid + ' with a restart of ' + restarts);
    }else{
        console.log('proccess creation failed');
    }
});

Notes

Windows

If you wish to use custom priority on a script, you might need write access on the running dir as wmic calls sometimes write a temp batch file

Nix

Uses nice for priority handling