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Unified Diff: chrome/browser/extensions/extension_settings_leveldb_storage.h

Issue 7189029: Implement an initial extension settings API. (Closed) Base URL: http://git.chromium.org/git/chromium.git@trunk
Patch Set: Make clang happy Created 9 years, 4 months ago
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Index: chrome/browser/extensions/extension_settings_leveldb_storage.h
diff --git a/chrome/browser/extensions/extension_settings_leveldb_storage.h b/chrome/browser/extensions/extension_settings_leveldb_storage.h
new file mode 100644
index 0000000000000000000000000000000000000000..699b8b46b318935a72b46e2b8c5b511400d01884
--- /dev/null
+++ b/chrome/browser/extensions/extension_settings_leveldb_storage.h
@@ -0,0 +1,59 @@
+// Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_LEVELDB_STORAGE_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_LEVELDB_STORAGE_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "base/task.h"
+#include "chrome/browser/extensions/extension_settings_storage.h"
+#include "third_party/leveldb/include/leveldb/db.h"
+
+// Extension settings storage object, backed by a leveldb database.
+// No caching is done; that should be handled by wrapping with an
+// ExtensionSettingsStorageCache.
+class ExtensionSettingsLeveldbStorage : public ExtensionSettingsStorage {
+ public:
+ // Tries to create a leveldb storage area for an extension at a base path.
+ // Returns NULL if creation fails.
+ // Must be run on the FILE thread.
+ static ExtensionSettingsLeveldbStorage* Create(
+ const FilePath& base_path, const std::string& extension_id);
+
+ // Can be run on any thread.
+ virtual void DeleteSoon() OVERRIDE;
+
+ virtual void Get(const std::string& key, Callback* callback) OVERRIDE;
+ virtual void Get(const ListValue& keys, Callback* callback) OVERRIDE;
+ virtual void Get(Callback* callback) OVERRIDE;
+ virtual void Set(
+ const std::string& key, const Value& value, Callback* callback) OVERRIDE;
+ virtual void Set(const DictionaryValue& values, Callback* callback) OVERRIDE;
+ virtual void Remove(const std::string& key, Callback* callback) OVERRIDE;
+ virtual void Remove(const ListValue& keys, Callback* callback) OVERRIDE;
+ virtual void Clear(Callback *callback) OVERRIDE;
+
+ private:
+ // Ownership of db is taken.
+ explicit ExtensionSettingsLeveldbStorage(leveldb::DB* db);
+
+ // This must only be deleted on the FILE thread.
+ friend class DeleteTask<ExtensionSettingsLeveldbStorage>;
+ virtual ~ExtensionSettingsLeveldbStorage();
+
+ // leveldb backend.
+ scoped_ptr<leveldb::DB> db_;
+
+ // Whether this has or is about to be deleted on the FILE thread.
+ // Used to prevent any use of this after DeleteSoon() is called.
+ bool marked_for_deletion_;
+
+ DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsLeveldbStorage);
+};
+
+#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_LEVELDB_STORAGE_H_

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