Updated script that can be controled by Nodejs web app

node_modules/backo2/.npmignore

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+node_modules/

node_modules/backo2/History.md

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+
+1.0.1 / 2014-02-17
+==================
+
+ * go away decimal point
+ * history
+
+1.0.0 / 2014-02-17
+==================
+
+ * add jitter option
+ * Initial commit

node_modules/backo2/Makefile

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+
+test:
+	@./node_modules/.bin/mocha \
+		--require should \
+		--reporter dot \
+		--bail
+
+.PHONY: test

node_modules/backo2/Readme.md

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+# backo
+
+  Simple exponential backoff because the others seem to have weird abstractions.
+
+## Installation
+
+```
+$ npm install backo
+```
+
+## Options
+
+ - `min` initial timeout in milliseconds [100]
+ - `max` max timeout [10000]
+ - `jitter` [0]
+ - `factor` [2]
+
+## Example
+
+```js
+var Backoff = require('backo');
+var backoff = new Backoff({ min: 100, max: 20000 });
+
+setTimeout(function(){
+  something.reconnect();
+}, backoff.duration());
+
+// later when something works
+backoff.reset()
+```
+
+# License
+
+  MIT

node_modules/backo2/component.json

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+{
+  "name": "backo",
+  "repo": "segmentio/backo",
+  "dependencies": {},
+  "version": "1.0.1",
+  "description": "simple backoff without the weird abstractions",
+  "keywords": ["backoff"],
+  "license": "MIT",
+  "scripts": ["index.js"],
+  "main": "index.js"
+}

node_modules/backo2/index.js

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+
+/**
+ * Expose `Backoff`.
+ */
+
+module.exports = Backoff;
+
+/**
+ * Initialize backoff timer with `opts`.
+ *
+ * - `min` initial timeout in milliseconds [100]
+ * - `max` max timeout [10000]
+ * - `jitter` [0]
+ * - `factor` [2]
+ *
+ * @param {Object} opts
+ * @api public
+ */
+
+function Backoff(opts) {
+  opts = opts || {};
+  this.ms = opts.min || 100;
+  this.max = opts.max || 10000;
+  this.factor = opts.factor || 2;
+  this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
+  this.attempts = 0;
+}
+
+/**
+ * Return the backoff duration.
+ *
+ * @return {Number}
+ * @api public
+ */
+
+Backoff.prototype.duration = function(){
+  var ms = this.ms * Math.pow(this.factor, this.attempts++);
+  if (this.jitter) {
+    var rand =  Math.random();
+    var deviation = Math.floor(rand * this.jitter * ms);
+    ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
+  }
+  return Math.min(ms, this.max) | 0;
+};
+
+/**
+ * Reset the number of attempts.
+ *
+ * @api public
+ */
+
+Backoff.prototype.reset = function(){
+  this.attempts = 0;
+};
+
+/**
+ * Set the minimum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMin = function(min){
+  this.ms = min;
+};
+
+/**
+ * Set the maximum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMax = function(max){
+  this.max = max;
+};
+
+/**
+ * Set the jitter
+ *
+ * @api public
+ */
+
+Backoff.prototype.setJitter = function(jitter){
+  this.jitter = jitter;
+};
+

node_modules/backo2/package.json

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+{
+  "name": "backo2",
+  "version": "1.0.2",
+  "repository": "mokesmokes/backo",
+  "description": "simple backoff based on segmentio/backo",
+  "keywords": [
+    "backoff"
+  ],
+  "dependencies": {},
+  "devDependencies": {
+    "mocha": "*",
+    "should": "*"
+  },
+  "license": "MIT"
+}

node_modules/backo2/test/index.js

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+
+var Backoff = require('..');
+var assert = require('assert');
+
+describe('.duration()', function(){
+  it('should increase the backoff', function(){
+    var b = new Backoff;
+
+    assert(100 == b.duration());
+    assert(200 == b.duration());
+    assert(400 == b.duration());
+    assert(800 == b.duration());
+
+    b.reset();
+    assert(100 == b.duration());
+    assert(200 == b.duration());
+  })
+})