// Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/basictypes.h" #include "sync/internal_api/public/engine/polling_constants.h" namespace syncer { // Server can overwrite these values via client commands. // Standard short poll. This is used when XMPP is off. // We use high values here to ensure that failure to receive poll updates from // the server doesn't result in rapid-fire polling from the client due to low // local limits. const int64 kDefaultShortPollIntervalSeconds = 3600 * 8; // Long poll is used when XMPP is on. const int64 kDefaultLongPollIntervalSeconds = 3600 * 12; // Maximum interval for exponential backoff. const int64 kMaxBackoffSeconds = 60 * 60 * 4; // 4 hours. // Backoff interval randomization factor. const int kBackoffRandomizationFactor = 2; // After a failure contacting sync servers, specifies how long to wait before // reattempting and entering exponential backoff if consecutive failures // occur. const int kInitialBackoffRetrySeconds = 60 * 5; // 5 minutes. // A dangerously short retry value that would not actually protect servers from // DDoS if it were used as a seed for exponential backoff, although the client // would still follow exponential backoff. Useful for debugging and tests (when // you don't want to wait 5 minutes). const int kInitialBackoffShortRetrySeconds = 1; // Similar to kInitialBackoffRetrySeconds above, but only to be used in // certain exceptional error cases, such as MIGRATION_DONE. const int kInitialBackoffImmediateRetrySeconds = 0; } // namespace syncer