Class to handle many concurrent open file handles in nodejs

gistfile1.txt

//Script in case you get following error in your project
/*
Error: EMFILE: too many open files, open '%file%'
    at Error (native)
*/
var fs = require('fs');

var fsHandler = function(callBack){
    var queue = [];
    var semaphore = 0;

    var addFile = function(filename){
        queue.push(filename);
    }
    this.checkQueue = function(){
        semaphore--;
        if(queue.length >0)
            this.checkFile(queue.shift())
    }
    this.readFile = function(filename){
        var self = this;
        fs.readFile(filename, 'utf8', function read(err, data) {
            if (err) {
                throw err;
            }
            callBack(data);
            self.checkQueue();
        });
    }
    this.checkFile = function(filename){
        if(semaphore >= 50 ){
            queue.push(filename);
        }else{
            this.readFile(filename);
            semaphore++;
        }
    }

}


function processFile(content) {
    console.log(content);
}

var fsHandler = new fsHandler(processFile);



for(var i = 0; i <100000;i++){
   fsHandler.checkFile("./read.txt");
}