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files >> //lib/node_modules/npm/node_modules/retry/lib/retry_operation.js
function RetryOperation(timeouts, options) { // Compatibility for the old (timeouts, retryForever) signature if (typeof options === 'boolean') { options = { forever: options }; } this._originalTimeouts = JSON.parse(JSON.stringify(timeouts)); this._timeouts = timeouts; this._options = options || {}; this._maxRetryTime = options && options.maxRetryTime || Infinity; this._fn = null; this._errors = []; this._attempts = 1; this._operationTimeout = null; this._operationTimeoutCb = null; this._timeout = null; this._operationStart = null; if (this._options.forever) { this._cachedTimeouts = this._timeouts.slice(0); } } module.exports = RetryOperation; RetryOperation.prototype.reset = function() { this._attempts = 1; this._timeouts = this._originalTimeouts; } RetryOperation.prototype.stop = function() { if (this._timeout) { clearTimeout(this._timeout); } this._timeouts = []; this._cachedTimeouts = null; }; RetryOperation.prototype.retry = function(err) { if (this._timeout) { clearTimeout(this._timeout); } if (!err) { return false; } var currentTime = new Date().getTime(); if (err && currentTime - this._operationStart >= this._maxRetryTime) { this._errors.unshift(new Error('RetryOperation timeout occurred')); return false; } this._errors.push(err); var timeout = this._timeouts.shift(); if (timeout === undefined) { if (this._cachedTimeouts) { // retry forever, only keep last error this._errors.splice(this._errors.length - 1, this._errors.length); this._timeouts = this._cachedTimeouts.slice(0); timeout = this._timeouts.shift(); } else { return false; } } var self = this; var timer = setTimeout(function() { self._attempts++; if (self._operationTimeoutCb) { self._timeout = setTimeout(function() { self._operationTimeoutCb(self._attempts); }, self._operationTimeout); if (self._options.unref) { self._timeout.unref(); } } self._fn(self._attempts); }, timeout); if (this._options.unref) { timer.unref(); } return true; }; RetryOperation.prototype.attempt = function(fn, timeoutOps) { this._fn = fn; if (timeoutOps) { if (timeoutOps.timeout) { this._operationTimeout = timeoutOps.timeout; } if (timeoutOps.cb) { this._operationTimeoutCb = timeoutOps.cb; } } var self = this; if (this._operationTimeoutCb) { this._timeout = setTimeout(function() { self._operationTimeoutCb(); }, self._operationTimeout); } this._operationStart = new Date().getTime(); this._fn(this._attempts); }; RetryOperation.prototype.try = function(fn) { console.log('Using RetryOperation.try() is deprecated'); this.attempt(fn); }; RetryOperation.prototype.start = function(fn) { console.log('Using RetryOperation.start() is deprecated'); this.attempt(fn); }; RetryOperation.prototype.start = RetryOperation.prototype.try; RetryOperation.prototype.errors = function() { return this._errors; }; RetryOperation.prototype.attempts = function() { return this._attempts; }; RetryOperation.prototype.mainError = function() { if (this._errors.length === 0) { return null; } var counts = {}; var mainError = null; var mainErrorCount = 0; for (var i = 0; i < this._errors.length; i++) { var error = this._errors[i]; var message = error.message; var count = (counts[message] || 0) + 1; counts[message] = count; if (count >= mainErrorCount) { mainError = error; mainErrorCount = count; } } return mainError; };
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