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| 1 // Copyright 2014 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 NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_ |
| 6 #define NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 #include "base/macros.h" |
| 11 #include "base/memory/ref_counted.h" |
| 12 #include "base/memory/weak_ptr.h" |
| 13 #include "base/threading/non_thread_safe.h" |
| 14 #include "base/time/time.h" |
| 15 #include "net/base/completion_callback.h" |
| 16 #include "net/base/net_export.h" |
| 17 #include "net/disk_cache/disk_cache.h" |
| 18 #include "net/quic/chromium/quic_server_info.h" |
| 19 |
| 20 namespace net { |
| 21 |
| 22 class HttpCache; |
| 23 class IOBufferWithSize; |
| 24 class QuicServerId; |
| 25 |
| 26 // DiskCacheBasedQuicServerInfo fetches information about a QUIC server from |
| 27 // our standard disk cache. Since the information is defined to be |
| 28 // non-sensitive, it's ok for us to keep it on disk. |
| 29 class NET_EXPORT_PRIVATE DiskCacheBasedQuicServerInfo |
| 30 : public QuicServerInfo, |
| 31 public NON_EXPORTED_BASE(base::NonThreadSafe) { |
| 32 public: |
| 33 DiskCacheBasedQuicServerInfo(const QuicServerId& server_id, |
| 34 HttpCache* http_cache); |
| 35 ~DiskCacheBasedQuicServerInfo() override; |
| 36 |
| 37 // QuicServerInfo implementation. |
| 38 void Start() override; |
| 39 int WaitForDataReady(const CompletionCallback& callback) override; |
| 40 void ResetWaitForDataReadyCallback() override; |
| 41 void CancelWaitForDataReadyCallback() override; |
| 42 bool IsDataReady() override; |
| 43 bool IsReadyToPersist() override; |
| 44 void Persist() override; |
| 45 void OnExternalCacheHit() override; |
| 46 size_t EstimateMemoryUsage() const override; |
| 47 |
| 48 private: |
| 49 struct CacheOperationDataShim; |
| 50 |
| 51 enum State { |
| 52 GET_BACKEND, |
| 53 GET_BACKEND_COMPLETE, |
| 54 OPEN, |
| 55 OPEN_COMPLETE, |
| 56 READ, |
| 57 READ_COMPLETE, |
| 58 WAIT_FOR_DATA_READY_DONE, |
| 59 CREATE_OR_OPEN, |
| 60 CREATE_OR_OPEN_COMPLETE, |
| 61 WRITE, |
| 62 WRITE_COMPLETE, |
| 63 SET_DONE, |
| 64 NONE, |
| 65 }; |
| 66 |
| 67 // Persists |pending_write_data_| if it is not empty, otherwise serializes the |
| 68 // data and pesists it. |
| 69 void PersistInternal(); |
| 70 |
| 71 std::string key() const; |
| 72 |
| 73 // The |unused| parameter is a small hack so that we can have the |
| 74 // CacheOperationDataShim object owned by the Callback that is created for |
| 75 // this method. See comment above CacheOperationDataShim for details. |
| 76 void OnIOComplete(CacheOperationDataShim* unused, int rv); |
| 77 |
| 78 int DoLoop(int rv); |
| 79 |
| 80 int DoGetBackendComplete(int rv); |
| 81 int DoOpenComplete(int rv); |
| 82 int DoReadComplete(int rv); |
| 83 int DoWriteComplete(int rv); |
| 84 int DoCreateOrOpenComplete(int rv); |
| 85 |
| 86 int DoGetBackend(); |
| 87 int DoOpen(); |
| 88 int DoRead(); |
| 89 int DoWrite(); |
| 90 int DoCreateOrOpen(); |
| 91 |
| 92 // DoWaitForDataReadyDone is the terminal state of the read operation. |
| 93 int DoWaitForDataReadyDone(); |
| 94 |
| 95 // DoSetDone is the terminal state of the write operation. |
| 96 int DoSetDone(); |
| 97 |
| 98 // Tracks in a histogram the number of times data read/parse/write API calls |
| 99 // of QuicServerInfo to and from disk cache is called. |
| 100 void RecordQuicServerInfoStatus(QuicServerInfoAPICall call); |
| 101 |
| 102 // Tracks in a histogram the failure reasons to read/load/write of |
| 103 // QuicServerInfo to and from disk cache. It also saves the |failure| in |
| 104 // |last_failure_|. |
| 105 void RecordQuicServerInfoFailure(FailureReason failure); |
| 106 |
| 107 // Tracks in a histogram if |last_failure_| is not NO_FAILURE. |
| 108 void RecordLastFailure(); |
| 109 |
| 110 CacheOperationDataShim* data_shim_; // Owned by |io_callback_|. |
| 111 CompletionCallback io_callback_; |
| 112 State state_; |
| 113 bool ready_; |
| 114 bool found_entry_; // Controls the behavior of DoCreateOrOpen. |
| 115 std::string new_data_; |
| 116 std::string pending_write_data_; |
| 117 const QuicServerId server_id_; |
| 118 HttpCache* const http_cache_; |
| 119 disk_cache::Backend* backend_; |
| 120 disk_cache::Entry* entry_; |
| 121 CompletionCallback wait_for_ready_callback_; |
| 122 scoped_refptr<IOBufferWithSize> read_buffer_; |
| 123 scoped_refptr<IOBufferWithSize> write_buffer_; |
| 124 std::string data_; |
| 125 base::TimeTicks load_start_time_; |
| 126 FailureReason last_failure_; |
| 127 |
| 128 base::WeakPtrFactory<DiskCacheBasedQuicServerInfo> weak_factory_; |
| 129 |
| 130 DISALLOW_COPY_AND_ASSIGN(DiskCacheBasedQuicServerInfo); |
| 131 }; |
| 132 |
| 133 } // namespace net |
| 134 |
| 135 #endif // NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_ |
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