chrome/browser/sync/test/integration/retry_verifier.h

   1 // Copyright 2013 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 #ifndef CHROME_BROWSER_SYNC_TEST_INTEGRATION_RETRY_VERIFIER_H_
   6 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_RETRY_VERIFIER_H_
   7
   8 #include "base/time/time.h"
   9
  10 namespace syncer {
  11 namespace sessions {
  12 class SyncSessionSnapshot;
  13 }  // namespace sessions
  14 }  // namespace syncer
  15
  16 // The minimum and maximum wait times for a retry. The actual retry would take
  17 // place somewhere in this range. The algorithm that calculates the retry wait
  18 // time uses rand functions.
  19 struct DelayInfo {
  20   int64 min_delay;
  21   int64 max_delay;
  22 };
  23
  24 // Class to verify retries take place using the exponential backoff algorithm.
  25 class RetryVerifier {
  26  public:
  27   static const int kMaxRetry = 3;
  28   RetryVerifier();
  29   ~RetryVerifier();
  30   int retry_count() const { return retry_count_; }
  31
  32   // Initialize with the current sync session snapshot. Using the snapshot
  33   // we will figure out when the first retry sync happened.
  34   void Initialize(const syncer::sessions::SyncSessionSnapshot& snap);
  35   void VerifyRetryInterval(
  36       const syncer::sessions::SyncSessionSnapshot& snap);
  37   bool done() const { return done_; }
  38   bool Succeeded() const { return done() && success_; }
  39
  40  private:
  41   int retry_count_;
  42   base::Time last_sync_time_;
  43   DelayInfo delay_table_[kMaxRetry];
  44   bool success_;
  45   bool done_;
  46   DISALLOW_COPY_AND_ASSIGN(RetryVerifier);
  47 };
  48
  49 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_RETRY_VERIFIER_H_