1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/basictypes.h" 6 #include "chrome/browser/sync/engine/polling_constants.h" 7 8 namespace browser_sync { 9 10 // Server can overwrite these values via client commands. 11 // Standard short poll. This is used when XMPP is off. 12 // We use high values here to ensure that failure to receive poll updates from 13 // the server doesn't result in rapid-fire polling from the client due to low 14 // local limits. 15 const int64 kDefaultShortPollIntervalSeconds = 3600 * 8; 16 // Long poll is used when XMPP is on. 17 const int64 kDefaultLongPollIntervalSeconds = 3600 * 12; 18 19 // Maximum interval for exponential backoff. 20 const int64 kMaxBackoffSeconds = 60 * 60 * 4; // 4 hours. 21 22 // Backoff interval randomization factor. 23 const int kBackoffRandomizationFactor = 2; 24 25 } // namespace browser_sync 26 27