| // 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 "components/sync/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_t kDefaultShortPollIntervalSeconds = 3600 * 8; |
| // Long poll is used when XMPP is on. |
| const int64_t kDefaultLongPollIntervalSeconds = 3600 * 12; |
| |
| // Maximum interval for exponential backoff. |
| const int64_t kMaxBackoffSeconds = 60 * 10; // 10 minutes. |
| |
| // 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 = 30; // 30 seconds. |
| |
| // 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 |