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

components/data_reduction_proxy/core/browser/db_data_store_impl.h

Index: components/data_reduction_proxy/core/browser/db_data_store_impl.h
diff --git a/components/data_reduction_proxy/core/browser/db_data_store_impl.h b/components/data_reduction_proxy/core/browser/db_data_store_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..c8e9ba0b6aafbc111ccb7a4f1cc522a84239cd7b
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+++ b/components/data_reduction_proxy/core/browser/db_data_store_impl.h
@@ -0,0 +1,52 @@
+// 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_DATA_STORE_IMPL_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DB_DATA_STORE_IMPL_H_
+
+#include <map>
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/sequence_checker.h"
+#include "components/data_reduction_proxy/core/browser/db_data_store.h"
+
+namespace leveldb {
+class DB;
+}
+
+namespace data_reduction_proxy {
+
+// Implementation of DataReductionProxyStore using LevelDB.

[jeremyim, 2015/07/08 18:21:46]

Rename in comment

[Not at Google. Contact bengr, 2015/07/08 19:07:20]

Done.

+class DBDataStoreImpl : public DBDataStore {
+ public:
+  explicit DBDataStoreImpl(const base::FilePath& profile_path);
+  ~DBDataStoreImpl() override;
+
+  void InitializeOnDBThread() override;
+
+  Status Get(const std::string& key, std::string* value) override;
+
+  Status Put(const std::map<std::string, std::string>& map) override;
+
+ private:
+  // Opens the underlying Level DB for read and write.
+  Status OpenDB();
+
+  // Deletes the LevelDB and recreates it. Call this method if any DB calls
+  // return |CORRUPTED| status.
+  void RecreateDB();
+
+  scoped_ptr<leveldb::DB> db_;
+  const base::FilePath profile_path_;
+  base::SequenceChecker sequence_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(DBDataStoreImpl);
+};
+
+}  // namespace data_reduction_proxy
+
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DB_DATA_STORE_IMPL_H_