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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 #ifndef COMPONENTS_CRONET_HOST_CACHE_PERSISTENCE_MANAGER_H_ | |
6 #define COMPONENTS_CRONET_HOST_CACHE_PERSISTENCE_MANAGER_H_ | |
7 | |
8 #include <memory> | |
9 #include <string> | |
10 | |
11 #include "base/macros.h" | |
12 #include "base/memory/weak_ptr.h" | |
13 #include "base/sequence_checker.h" | |
14 #include "base/time/time.h" | |
15 #include "net/dns/host_cache.h" | |
16 | |
17 class PrefChangeRegistrar; | |
18 class PrefService; | |
19 | |
20 namespace base { | |
21 class OneShotTimer; | |
22 } | |
23 | |
24 namespace cronet { | |
25 // Handles the interaction between HostCache and prefs for persistence. | |
26 // On write, starts a timer, or ignores if the timer is already running. When | |
27 // that timer expires, writes the current state of the HostCache to prefs. | |
28 // | |
29 // Can be used with synchronous or asynchronous prefs loading. Not appropriate | |
30 // for use outside of Cronet because its network and prefs operations run on | |
31 // the same sequence. Must be created after and destroyed before the HostCache | |
32 // and PrefService. | |
33 class HostCachePersistenceManager : public net::HostCache::PersistenceDelegate { | |
34 public: | |
35 HostCachePersistenceManager(net::HostCache* cache, | |
pauljensen
2017/06/22 19:03:51
Can you add a comment here explaining the argument
mgersh
2017/06/22 21:27:32
Done.
| |
36 PrefService* pref_service, | |
37 std::string pref_name, | |
38 base::TimeDelta delay); | |
39 ~HostCachePersistenceManager(); | |
40 | |
41 // HostCache::PersistenceDelegate implementation | |
42 void ScheduleWrite() override; | |
43 | |
44 private: | |
45 // Gets the serialized HostCache and writes it to prefs. | |
46 void DoWrite(); | |
47 // On initial prefs read, passes the serialized entries to the HostCache. | |
48 void OnRead(); | |
49 | |
50 net::HostCache* cache_; | |
pauljensen
2017/06/22 19:03:50
add const, then we can remove all but the construc
mgersh
2017/06/22 21:27:32
Done.
| |
51 | |
52 std::unique_ptr<PrefChangeRegistrar> registrar_; | |
pauljensen
2017/06/22 19:03:51
remove the unique_ptr, so just PrefChangeRegistrar
mgersh
2017/06/22 21:27:32
Done.
| |
53 PrefService* pref_service_; | |
pauljensen
2017/06/22 19:03:51
add const, then we can remove all but the construc
mgersh
2017/06/22 21:27:32
Done.
| |
54 const std::string pref_name_; | |
55 bool writing_pref_; | |
56 | |
57 base::TimeDelta delay_; | |
pauljensen
2017/06/22 19:03:50
const
mgersh
2017/06/22 21:27:32
Done.
| |
58 std::unique_ptr<base::OneShotTimer> timer_; | |
pauljensen
2017/06/22 19:03:50
remove the unique_ptr, so just base::OneShotTimer
mgersh
2017/06/22 21:27:32
Done.
| |
59 | |
60 SEQUENCE_CHECKER(sequence_checker_); | |
61 base::WeakPtrFactory<HostCachePersistenceManager> weak_factory_; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(HostCachePersistenceManager); | |
64 }; | |
65 | |
66 } // namespace cronet | |
67 | |
68 #endif // COMPONENTS_CRONET_HOST_CACHE_PERSISTENCE_MANAGER_H_ | |
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