/
polly.js
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/
polly.js
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/**
* Created by maurice on 9/17/2015.
*/
(function (root, factory) {
if (typeof define === "function" && define.amd) {
// AMD. Register as an anonymous module.
define([], factory);
} else if (typeof exports === "object") {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.polly = factory();
}
})(this, function () {
"use strict";
var defaults = {
delay: 100,
};
function execute(config, cb) {
var count = 0;
while (true) {
try {
return cb({ count: count });
} catch (ex) {
if (count < config.count && config.handleFn(ex)) {
config.loggerFn(ex);
count++;
} else {
throw ex;
}
}
}
}
function executeForPromise(config, cb) {
var count = 0;
return new Promise(function (resolve, reject) {
function execute() {
var original = cb({ count: count });
original.then(
function (e) {
resolve(e);
},
function (e) {
if (count < config.count && config.handleFn(e)) {
config.loggerFn(e);
count++;
execute();
} else {
reject(e);
}
}
);
}
execute();
});
}
function executeForPromiseWithDelay(config, cb) {
var count = 0;
return new Promise(function (resolve, reject) {
function execute() {
var original = cb({ count: count });
original.then(
function (e) {
resolve(e);
},
function (e) {
var delay = config.delays.shift();
if (delay && config.handleFn(e)) {
config.loggerFn(e);
count++;
setTimeout(execute, delay);
} else {
reject(e);
}
}
);
}
execute();
});
}
function executeForNode(config, fn, callback) {
var count = 0;
function internalCallback(err, data) {
if (err && count < config.count && config.handleFn(err)) {
config.loggerFn(err);
count++;
fn(internalCallback, { count: count });
} else {
callback(err, data);
}
}
fn(internalCallback, { count: count });
}
function executeForNodeWithDelay(config, fn, callback) {
var count = 0;
function internalCallback(err, data) {
var delay = config.delays.shift();
if (err && delay && config.handleFn(err)) {
config.loggerFn(err);
count++;
setTimeout(function () {
fn(internalCallback, { count: count });
}, delay);
} else {
callback(err, data);
}
}
fn(internalCallback, { count: count });
}
function delayCountToDelays(count) {
var delays = [],
delay = defaults.delay;
for (var i = 0; i < count; i++) {
delays.push(delay);
delay = 2 * delay;
}
return delays;
}
var pollyFn = function () {
var config = {
count: 1,
delays: [defaults.delay],
handleFn: function () {
return true;
},
loggerFn: function (err) {},
};
return {
logger: function (loggerFn) {
if (typeof loggerFn === "function") {
config.loggerFn = loggerFn;
}
return this;
},
handle: function (handleFn) {
if (typeof handleFn === "function") {
config.handleFn = handleFn;
}
return this;
},
retry: function (count) {
if (typeof count === "number") {
config.count = count;
}
return {
execute: execute.bind(null, config),
executeForPromise: executeForPromise.bind(null, config),
executeForNode: executeForNode.bind(null, config),
};
},
waitAndRetry: function (delays) {
if (typeof delays === "number") {
delays = delayCountToDelays(delays);
}
if (Array.isArray(delays)) {
config.delays = delays;
}
return {
executeForPromise: executeForPromiseWithDelay.bind(
null,
config
),
executeForNode: executeForNodeWithDelay.bind(null, config),
};
},
};
};
pollyFn.defaults = defaults;
return pollyFn;
});