host_cache_persistence_manager.cc 2.8 KB

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  1. // Copyright 2017 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. #include "components/cronet/host_cache_persistence_manager.h"
  5. #include <memory>
  6. #include "base/bind.h"
  7. #include "base/values.h"
  8. #include "components/prefs/pref_service.h"
  9. #include "net/log/net_log.h"
  10. namespace cronet {
  11. HostCachePersistenceManager::HostCachePersistenceManager(
  12. net::HostCache* cache,
  13. PrefService* pref_service,
  14. std::string pref_name,
  15. base::TimeDelta delay,
  16. net::NetLog* net_log)
  17. : cache_(cache),
  18. pref_service_(pref_service),
  19. pref_name_(pref_name),
  20. writing_pref_(false),
  21. delay_(delay),
  22. net_log_(net::NetLogWithSource::Make(
  23. net_log,
  24. net::NetLogSourceType::HOST_CACHE_PERSISTENCE_MANAGER)) {
  25. DCHECK(cache_);
  26. DCHECK(pref_service_);
  27. // Get the initial value of the pref if it's already initialized.
  28. if (pref_service_->HasPrefPath(pref_name_))
  29. ReadFromDisk();
  30. registrar_.Init(pref_service_);
  31. registrar_.Add(pref_name_,
  32. base::BindRepeating(&HostCachePersistenceManager::ReadFromDisk,
  33. weak_factory_.GetWeakPtr()));
  34. cache_->set_persistence_delegate(this);
  35. }
  36. HostCachePersistenceManager::~HostCachePersistenceManager() {
  37. DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  38. timer_.Stop();
  39. registrar_.RemoveAll();
  40. cache_->set_persistence_delegate(nullptr);
  41. }
  42. void HostCachePersistenceManager::ReadFromDisk() {
  43. DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  44. if (writing_pref_)
  45. return;
  46. net_log_.BeginEvent(net::NetLogEventType::HOST_CACHE_PREF_READ);
  47. const base::Value::List& pref_value = pref_service_->GetValueList(pref_name_);
  48. bool success = cache_->RestoreFromListValue(pref_value);
  49. net_log_.AddEntryWithBoolParams(net::NetLogEventType::HOST_CACHE_PREF_READ,
  50. net::NetLogEventPhase::END, "success",
  51. success);
  52. }
  53. void HostCachePersistenceManager::ScheduleWrite() {
  54. DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  55. if (timer_.IsRunning())
  56. return;
  57. net_log_.AddEvent(net::NetLogEventType::HOST_CACHE_PERSISTENCE_START_TIMER);
  58. timer_.Start(FROM_HERE, delay_,
  59. base::BindOnce(&HostCachePersistenceManager::WriteToDisk,
  60. weak_factory_.GetWeakPtr()));
  61. }
  62. void HostCachePersistenceManager::WriteToDisk() {
  63. DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  64. net_log_.AddEvent(net::NetLogEventType::HOST_CACHE_PREF_WRITE);
  65. base::Value::List list;
  66. cache_->GetList(list, false, net::HostCache::SerializationType::kRestorable);
  67. writing_pref_ = true;
  68. pref_service_->SetList(pref_name_, std::move(list));
  69. writing_pref_ = false;
  70. }
  71. } // namespace cronet