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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 |
| 5 #include "components/cronet/host_cache_persistence_manager.h" |
| 6 |
| 7 #include <memory> |
| 8 |
| 9 #include "base/memory/ptr_util.h" |
| 10 #include "base/values.h" |
| 11 #include "components/prefs/pref_service.h" |
| 12 |
| 13 namespace cronet { |
| 14 |
| 15 HostCachePersistenceManager::HostCachePersistenceManager( |
| 16 net::HostCache* cache, |
| 17 PrefService* pref_service, |
| 18 std::string pref_name, |
| 19 base::TimeDelta delay) |
| 20 : cache_(cache), |
| 21 pref_service_(pref_service), |
| 22 pref_name_(pref_name), |
| 23 delay_(delay), |
| 24 weak_factory_(this) { |
| 25 DCHECK(cache_); |
| 26 DCHECK(pref_service_); |
| 27 |
| 28 // Get the initial value of the pref if it's already initialized. |
| 29 if (pref_service_->HasPrefPath(pref_name_)) |
| 30 ReadFromDisk(); |
| 31 |
| 32 registrar_.Init(pref_service_); |
| 33 registrar_.Add(pref_name_, |
| 34 base::Bind(&HostCachePersistenceManager::ReadFromDisk, |
| 35 weak_factory_.GetWeakPtr())); |
| 36 cache_->set_persistence_delegate(this); |
| 37 } |
| 38 |
| 39 HostCachePersistenceManager::~HostCachePersistenceManager() { |
| 40 DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| 41 |
| 42 timer_.Stop(); |
| 43 registrar_.RemoveAll(); |
| 44 cache_->set_persistence_delegate(nullptr); |
| 45 } |
| 46 |
| 47 void HostCachePersistenceManager::ReadFromDisk() { |
| 48 DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| 49 |
| 50 if (writing_pref_) |
| 51 return; |
| 52 |
| 53 const base::ListValue* pref_value = pref_service_->GetList(pref_name_); |
| 54 cache_->RestoreFromListValue(*pref_value); |
| 55 } |
| 56 |
| 57 void HostCachePersistenceManager::ScheduleWrite() { |
| 58 DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| 59 |
| 60 if (timer_.IsRunning()) |
| 61 return; |
| 62 |
| 63 timer_.Start(FROM_HERE, delay_, |
| 64 base::Bind(&HostCachePersistenceManager::WriteToDisk, |
| 65 weak_factory_.GetWeakPtr())); |
| 66 } |
| 67 |
| 68 void HostCachePersistenceManager::WriteToDisk() { |
| 69 DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| 70 |
| 71 base::ListValue value; |
| 72 cache_->GetAsListValue(&value, false); |
| 73 writing_pref_ = true; |
| 74 pref_service_->Set(pref_name_, value); |
| 75 writing_pref_ = false; |
| 76 } |
| 77 |
| 78 } // namespace cronet |
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