35 lines
988 B
JavaScript
35 lines
988 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var util = require('util');
|
||
|
|
var debug = require('../../util/debug')('capacity-http-load');
|
||
|
|
var HttpSimpleCapacity = require('./http-simple');
|
||
|
|
|
||
|
|
function HttpLoadCapacity(host, capacityEndpoint) {
|
||
|
|
HttpSimpleCapacity.call(this);
|
||
|
|
this.host = host;
|
||
|
|
this.capacityEndpoint = capacityEndpoint;
|
||
|
|
}
|
||
|
|
util.inherits(HttpLoadCapacity, HttpSimpleCapacity);
|
||
|
|
|
||
|
|
module.exports = HttpLoadCapacity;
|
||
|
|
|
||
|
|
HttpLoadCapacity.prototype.getCapacity = function(callback) {
|
||
|
|
this.getResponse(function(err, values) {
|
||
|
|
var capacity = 1;
|
||
|
|
|
||
|
|
if (err) {
|
||
|
|
return callback(null, capacity);
|
||
|
|
}
|
||
|
|
|
||
|
|
var cores = parseInt(values.cores, 10);
|
||
|
|
var relativeLoad = parseFloat(values.relative_load);
|
||
|
|
|
||
|
|
capacity = Math.max(1, Math.floor(((1 - relativeLoad) * cores) - 1));
|
||
|
|
|
||
|
|
capacity = Number.isFinite(capacity) ? capacity : 1;
|
||
|
|
|
||
|
|
debug('host=%s, capacity=%s', this.host, capacity);
|
||
|
|
return callback(null, capacity);
|
||
|
|
}.bind(this));
|
||
|
|
};
|