Add extendsError method

Changelog.md

@@ -2,6 +2,8 @@
 
 ### Master Branch
 
+* Support cluster auto reconnection.
+* Add `maxRedirections` option to Cluster.
 * Remove `roleRetryDelay` option in favor of `sentinelRetryStrategy`.
 * Improve compatibility with node_redis.
 * More stable sentinel connection.

lib/parsers/javascript.js

@@ -2,6 +2,7 @@
 
 var events = require('events');
 var util = require('util');
+var utils = require('../utils');
 var ReplyError = require('../reply_error');
 
 function Packet(type, size) {
@@ -22,14 +23,7 @@ util.inherits(ReplyParser, events.EventEmitter);
 
 module.exports = ReplyParser;
 
-function IncompleteReadBuffer(message) {
-  Error.call(this);
-  Error.captureStackTrace(this, this.constructor);
-
-  this.name = this.constructor.name;
-  this.message = message;
-}
-util.inherits(IncompleteReadBuffer, Error);
+var IncompleteReadBuffer = utils.extendsError('IncompleteReadBuffer');
 
 // Buffer.toString() is quite slow for small strings
 function smallToString(buf, start, end) {

lib/reply_error.js

@@ -1,16 +1,5 @@
 'use strict';
 
-var util = require('util');
+var utils = require('./utils');
 
-function ReplyError(message) {
-  Error.call(this);
-  Error.captureStackTrace(this, this.constructor);
-
-  this.name = this.constructor.name;
-  this.message = message;
-}
-
-// inherit from Error
-util.inherits(ReplyError, Error);
-
-module.exports = ReplyError;
+module.exports = utils.extendsError('ReplyError');

lib/utils/index.js

@@ -1,5 +1,6 @@
 'use strict';
 var urllib = require('url');
+var util = require('util');
 var _ = require('lodash');
 
 /**
@@ -282,3 +283,18 @@ exports.parseURL = function (url) {
 
   return result;
 };
+
+exports.extendsError = function (name) {
+  var errorClass = function (message) {
+    Error.call(this);
+    Error.captureStackTrace(this, this.constructor);
+
+    this.name = name;
+    this.message = message;
+  };
+
+  // inherit from Error
+  util.inherits(errorClass, Error);
+
+  return errorClass;
+};