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Mini Shell
Mini Shell
'use strict';
/*
* cls-bluebird
* Function to shim `Promise.prototype._resolveFromExecutor`
* in order to patch `onCancel` handler in `new Promise()`.
*/
// Modules
var shimmer = require('shimmer');
// Exports
/**
* Patch `_resolveFromExecutor` proto method to run `onCancel` callbacks in current CLS context.
*
* @param {Function} Promise - Bluebird Promise constructor to patch
* @param {Object} ns - CLS namespace to bind callbacks to
* @returns {undefined}
*/
module.exports = function(Promise, ns) {
// Patch method
shimmer.wrap(Promise.prototype, '_resolveFromExecutor', function(_resolveFromExecutorOriginal) {
return function(executor) {
// Patch executor
var executorPatched = function() {
var onCancel = arguments[2];
if (onCancel) {
// Patch onCancel function
arguments[2] = function(fn) {
// Bind onCancel handler to current CLS context
if (typeof fn === 'function') fn = ns.bind(fn);
return onCancel.call(this, fn);
};
}
return executor.apply(this, arguments);
};
// Call original method
return _resolveFromExecutorOriginal.call(this, executorPatched);
};
});
};
Zerion Mini Shell 1.0