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function RetryOperation(timeouts, options) {
// Compatibility for the old (timeouts, retryForever) signature
if (typeof options === 'boolean') {
options = { forever: options };
}
this._timeouts = timeouts;
this._options = options || {};
this._fn = null;
this._errors = [];
this._attempts = 1;
this._operationTimeout = null;
this._operationTimeoutCb = null;
this._timeout = null;
if (this._options.forever) {
this._cachedTimeouts = this._timeouts.slice(0);
}
}
module.exports = RetryOperation;
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;
}
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 (this._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._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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