ResPool

Instance pooling and load-balancing.

var _             = require('underscore');
var respool     = require('./respool');

var childClass    = function(callback) {
    this.count    = 0;
    setTimeout(function() {
        callback();
    }, _.random(200,3000));
};
childClass.prototype.hit = function () {
    this.count++;
    return this.count;
};



var demo    = function(n) {
    var scope    = this;
    this.n        = n;
    this.spool    = new respool({
        async:        false,
        progress:    'Creating...',
        count:        10,
        min:        2,
        create:        function(done) {
            var instance;
            instance = new childClass(function() {
                console.log("> created");
                done(instance);
            });
        }
    });
    this.spool.init(function() {
        console.log("Spool.init()");
        scope.start();
        scope.output();
    });

}
demo.prototype.start = function() {
    var i;
    console.log("Start", this.n);
    for (i=0;i<this.n;i++) {
        this.spool.instance().hit();
    }
}
demo.prototype.output = function() {
    _.each(this.spool.counts, function(count, n) {
        console.log("Instance #"+n, count);
    });
}


var test    = new demo(100);