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// Copyright 2013 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 CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_SESSION_H_
#define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_SESSION_H_
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "content/browser/dom_storage/session_storage_namespace_impl.h"
#include "content/common/content_export.h"
namespace content {
class DOMStorageContextImpl;
// This refcounted class determines the lifetime of a session
// storage namespace and provides an interface to Clone() an
// existing session storage namespace. It may be used on any thread.
// See class comments for DOMStorageContextImpl for a larger overview.
class CONTENT_EXPORT DOMStorageSession
: public base::RefCountedThreadSafe<DOMStorageSession> {
public:
// Constructs a |DOMStorageSession| and allocates new IDs for it.
explicit DOMStorageSession(DOMStorageContextImpl* context);
// Constructs a |DOMStorageSession| and assigns |persistent_namespace_id|
// to it. Allocates a new non-persistent ID.
DOMStorageSession(DOMStorageContextImpl* context,
const std::string& persistent_namespace_id);
// Constructs a |DOMStorageSession| as an alias of
// |master_dom_storage_session|. Allocates a new non-persistent ID.
explicit DOMStorageSession(DOMStorageSession* master_dom_storage_session);
int64 namespace_id() const { return namespace_id_; }
const std::string& persistent_namespace_id() const {
return persistent_namespace_id_;
}
void SetShouldPersist(bool should_persist);
bool should_persist() const;
bool IsFromContext(DOMStorageContextImpl* context);
DOMStorageSession* Clone();
// Constructs a |DOMStorageSession| by cloning
// |namespace_id_to_clone|. Allocates new IDs for it.
static DOMStorageSession* CloneFrom(DOMStorageContextImpl* context,
int64 namepace_id_to_clone);
void AddTransactionLogProcessId(int process_id);
void RemoveTransactionLogProcessId(int process_id);
void Merge(bool actually_merge,
int process_id,
DOMStorageSession* other,
const SessionStorageNamespace::MergeResultCallback& callback);
private:
friend class base::RefCountedThreadSafe<DOMStorageSession>;
DOMStorageSession(DOMStorageContextImpl* context,
int64 namespace_id,
const std::string& persistent_namespace_id);
~DOMStorageSession();
void ProcessMergeResult(
bool actually_merge,
const SessionStorageNamespace::MergeResultCallback& callback,
const std::string& new_persistent_namespace_id,
SessionStorageNamespace::MergeResult result);
scoped_refptr<DOMStorageContextImpl> context_;
int64 namespace_id_;
std::string persistent_namespace_id_;
bool should_persist_;
DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageSession);
};
} // namespace content
#endif // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_SESSION_H_
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