Add options object to keys signature with optional scanCount.

Author: jeff-kilbride

index.js

@@ -328,12 +328,19 @@ function redisStore(args) {
    * Returns all keys matching pattern using the SCAN command.
    * @method keys
    * @param {String} pattern - The pattern used to match keys
+   * @param {Object} [options] - The options (optional)
+   * @param {number} [options.scanCount] - The number of keys to traverse with each call to SCAN (default: 100)
    * @param {Function} cb - A callback that returns a potential error and the response
    */
-  self.keys = function(pattern, cb) {
+  self.keys = function(pattern, options, cb) {
     if (typeof pattern === 'function') {
       cb = pattern;
       pattern = '*';
+      options = {};
+    }
+    else if (typeof options === 'function') {
+      cb = options;
+      options = {};
     }
 
     connect(function(err, conn) {
@@ -343,10 +350,10 @@ function redisStore(args) {
 
       // Use an object to dedupe as scan can return duplicates
       var keysObj = {};
-      var count = 100;
+      var scanCount = options.scanCount || 100;
 
       (function nextBatch(cursorId) {
-        conn.scan(cursorId, 'match', pattern, 'count', count, function (err, result) {
+        conn.scan(cursorId, 'match', pattern, 'count', scanCount, function (err, result) {
           if (err) {
             return cb && cb(err);
           }