LevelDB storage for data reduction proxy to store data usage stats.

components/data_reduction_proxy/core/browser/db_service.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DB_SERVICE_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DB_SERVICE_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"

[jeremyim, 2015/07/01 21:31:01]

Unused.

[Not at Google. Contact bengr, 2015/07/01 23:17:38]

Done.

+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace data_reduction_proxy {
+class DataReductionProxyStore;
+class DataUsageStore;
+class DataUsageBucket;
+
+typedef base::Callback<void(scoped_ptr<DataUsageBucket>)>
+    OnLoadDataUsageBucketCallback;
+
+// Contains and initializes all Data Reduction Proxy objects that have a
+// lifetime based on the DB thread.
+class DBService {

[jeremyim, 2015/07/01 21:31:02]

DataReductionProxyDBData?

[Not at Google. Contact bengr, 2015/07/01 23:17:38]

Personally prefer just DBData without the prefix. Do you have a preference on
prefix vs no prefix?

Using "DataReductionProxy" prefix on everything makes things pretty hard to
read. Especially when we also tag on "data_reduction_proxy::" namespace.

[jeremyim, 2015/07/06 20:08:42]

For better our worse, we prefix our filenames + classes (especially when the
names would be fairly generic otherwise).

[Not at Google. Contact bengr, 2015/07/06 21:02:23]

sleevi@ had brought our naming convention up in a prior review and now michaeln@
pointed out the same issue.
Sent an email to the team. Will wait to see if there is a consensus before I get
LGTMs. If not, I'll rename to DataReductionProxyDBData.

+ public:
+  explicit DBService(scoped_ptr<DataReductionProxyStore> store);
+  virtual ~DBService();
+
+  void InitializeOnDBThread();
+
+  void LoadCurrentDataUsageBucket(DataUsageBucket* bucket);
+
+  void StoreCurrentDataUsageBucket(scoped_ptr<DataUsageBucket> current);
+
+  base::WeakPtr<DBService> GetWeakPtr();
+
+ private:
+  scoped_ptr<DataReductionProxyStore> store_;
+  scoped_ptr<DataUsageStore> data_usage_;
+  base::WeakPtrFactory<DBService> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DBService);
+};
+
+}  // namespace data_reduction_proxy
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DB_SERVICE_H_