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| 1 // Copyright 2008, Google Inc. | |
| 2 // | |
| 3 // Redistribution and use in source and binary forms, with or without | |
| 4 // modification, are permitted provided that the following conditions are met: | |
| 5 // | |
| 6 // 1. Redistributions of source code must retain the above copyright notice, | |
| 7 // this list of conditions and the following disclaimer. | |
| 8 // 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 9 // this list of conditions and the following disclaimer in the documentation | |
| 10 // and/or other materials provided with the distribution. | |
| 11 // 3. Neither the name of Google Inc. nor the names of its contributors may be | |
| 12 // used to endorse or promote products derived from this software without | |
| 13 // specific prior written permission. | |
| 14 // | |
| 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 // | |
| 26 // The BackoffManager class is used to implement exponential back-off for | |
| 27 // network requests in case of sever errors. Users report to the BackoffManager | |
| 28 // class when they make a request to or receive a response from a given url. The | |
| 29 // BackoffManager class provides the earliest time at which subsequent requests | |
| 30 // should be made. | |
| 31 | |
| 32 #ifndef GEARS_GEOLOCATION_BACKOFF_MANAGER_H__ | |
| 33 #define GEARS_GEOLOCATION_BACKOFF_MANAGER_H__ | |
| 34 | |
| 35 // TODO(joth): port to chromium | |
| 36 #if 0 | |
| 37 | |
| 38 #include "gears/base/common/common.h" | |
| 39 #include "gears/base/common/mutex.h" | |
| 40 #include "gears/base/common/stopwatch.h" // For GetCurrentTimeMillis | |
| 41 #include <map> | |
| 42 | |
| 43 class BackoffManager { | |
| 44 public: | |
| 45 static void ReportRequest(const std::string16 &url); | |
| 46 static int64 ReportResponse(const std::string16 &url, bool server_error); | |
| 47 | |
| 48 private: | |
| 49 // A map from server URL to a pair of integers representing the last request | |
| 50 // time and the current minimum interval between requests, both in | |
| 51 // milliseconds. | |
| 52 typedef std::map<std::string16, std::pair<int64, int64> > ServerMap; | |
| 53 static ServerMap servers_; | |
| 54 | |
| 55 // The mutex used to protect the map. | |
| 56 static Mutex servers_mutex_; | |
| 57 | |
| 58 DISALLOW_EVIL_CONSTRUCTORS(BackoffManager); | |
| 59 }; | |
| 60 | |
| 61 #endif // if 0 | |
| 62 | |
| 63 #endif // GEARS_GEOLOCATION_BACKOFF_MANAGER_H__ | |
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