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// Copyright (c) 2012 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_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_
#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "components/policy/core/common/policy_service.h"
#include "extensions/browser/api/storage/settings_observer.h"
#include "extensions/browser/api/storage/value_store_cache.h"
class Profile;
namespace content {
class BrowserContext;
}
namespace policy {
class PolicyMap;
}
namespace extensions {
class PolicyValueStore;
class SettingsStorageFactory;
// A ValueStoreCache that manages a PolicyValueStore for each extension that
// uses the storage.managed namespace. This class observes policy changes and
// which extensions listen for storage.onChanged(), and sends the appropriate
// updates to the corresponding PolicyValueStore on the FILE thread.
class ManagedValueStoreCache : public ValueStoreCache,
public policy::PolicyService::Observer {
public:
// |factory| is used to create databases for the PolicyValueStores.
// |observers| is the list of SettingsObservers to notify when a ValueStore
// changes.
ManagedValueStoreCache(content::BrowserContext* context,
const scoped_refptr<SettingsStorageFactory>& factory,
const scoped_refptr<SettingsObserverList>& observers);
virtual ~ManagedValueStoreCache();
private:
class ExtensionTracker;
// Maps an extension ID to its PolicyValueStoreMap.
typedef std::map<std::string, linked_ptr<PolicyValueStore> >
PolicyValueStoreMap;
// ValueStoreCache implementation:
virtual void ShutdownOnUI() OVERRIDE;
virtual void RunWithValueStoreForExtension(
const StorageCallback& callback,
scoped_refptr<const Extension> extension) OVERRIDE;
virtual void DeleteStorageSoon(const std::string& extension_id) OVERRIDE;
// PolicyService::Observer implementation:
virtual void OnPolicyServiceInitialized(policy::PolicyDomain domain) OVERRIDE;
virtual void OnPolicyUpdated(const policy::PolicyNamespace& ns,
const policy::PolicyMap& previous,
const policy::PolicyMap& current) OVERRIDE;
// Posted by OnPolicyUpdated() to update a PolicyValueStore on the FILE
// thread.
void UpdatePolicyOnFILE(const std::string& extension_id,
scoped_ptr<policy::PolicyMap> current_policy);
// Returns an existing PolicyValueStore for |extension_id|, or NULL.
PolicyValueStore* GetStoreFor(const std::string& extension_id);
// Returns true if a backing store has been created for |extension_id|.
bool HasStore(const std::string& extension_id) const;
// The profile that owns the extension system being used. This is used to
// get the PolicyService, the EventRouter and the ExtensionService.
Profile* profile_;
// The |profile_|'s PolicyService.
policy::PolicyService* policy_service_;
// Observes extension loading and unloading, and keeps the Profile's
// PolicyService aware of the current list of extensions.
scoped_ptr<ExtensionTracker> extension_tracker_;
// These live on the FILE thread.
scoped_refptr<SettingsStorageFactory> storage_factory_;
scoped_refptr<SettingsObserverList> observers_;
base::FilePath base_path_;
// All the PolicyValueStores live on the FILE thread, and |store_map_| can be
// accessed only on the FILE thread as well.
PolicyValueStoreMap store_map_;
DISALLOW_COPY_AND_ASSIGN(ManagedValueStoreCache);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_
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