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// 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 WEBKIT_FILEAPI_FILE_SYSTEM_QUOTA_UTIL_H_
#define WEBKIT_FILEAPI_FILE_SYSTEM_QUOTA_UTIL_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "googleurl/src/gurl.h"
#include "webkit/fileapi/file_system_types.h"
namespace base {
class MessageLoopProxy;
}
namespace quota {
class QuotaManagerProxy;
}
namespace fileapi {
// An abstract interface that provides common quota-related utility functions
// for internal filesystem modules. The main consumer of this class is
// file_system_quota_client and quota_file_util.
// All the methods of this class are synchronous and need to be called on
// the thread that the method name implies.
class FileSystemQuotaUtil {
public:
// Methods of this class can be called on any thread.
class Proxy : public base::RefCountedThreadSafe<Proxy> {
public:
void UpdateOriginUsage(quota::QuotaManagerProxy* proxy,
const GURL& origin_url,
fileapi::FileSystemType type,
int64 delta);
void StartUpdateOrigin(const GURL& origin_url,
fileapi::FileSystemType type);
void EndUpdateOrigin(const GURL& origin_url,
fileapi::FileSystemType type);
private:
friend class FileSystemQuotaUtil;
friend class base::RefCountedThreadSafe<Proxy>;
Proxy(FileSystemQuotaUtil* quota_handler,
base::MessageLoopProxy* file_thread);
~Proxy();
FileSystemQuotaUtil* quota_util_; // Accessed only on the FILE thread.
scoped_refptr<base::MessageLoopProxy> file_thread_;
DISALLOW_COPY_AND_ASSIGN(Proxy);
};
// Called by quota client.
virtual void GetOriginsForTypeOnFileThread(fileapi::FileSystemType type,
std::set<GURL>* origins) = 0;
// Called by quota client.
virtual void GetOriginsForHostOnFileThread(fileapi::FileSystemType type,
const std::string& host,
std::set<GURL>* origins) = 0;
// Called by quota client.
// Returns the amount of data used for the origin for usage tracking.
virtual int64 GetOriginUsageOnFileThread(const GURL& origin_url,
fileapi::FileSystemType type) = 0;
// Called by quota file util.
virtual void UpdateOriginUsageOnFileThread(quota::QuotaManagerProxy* proxy,
const GURL& origin_url,
fileapi::FileSystemType type,
int64 delta) = 0;
// Called by file_system_operation.
// Called when a read operation accesses the origin's storage data.
virtual void NotifyOriginWasAccessedOnIOThread(
quota::QuotaManagerProxy* proxy,
const GURL& origin_url,
fileapi::FileSystemType type) = 0;
// Called by quota_file_util or file_writer_delegate.
// Called before a write operation modifies the origin's storage data.
virtual void StartUpdateOriginOnFileThread(const GURL& origin_url,
fileapi::FileSystemType type) = 0;
// Called by quota_file_util or file_writer_delegate.
// Called after a write operation modifies the origin's storage data.
virtual void EndUpdateOriginOnFileThread(const GURL& origin_url,
fileapi::FileSystemType type) = 0;
virtual void InvalidateUsageCache(const GURL& origin_url,
fileapi::FileSystemType type) = 0;
Proxy* proxy() { return proxy_.get(); }
protected:
explicit FileSystemQuotaUtil(base::MessageLoopProxy* file_thread);
virtual ~FileSystemQuotaUtil();
private:
scoped_refptr<Proxy> proxy_;
};
} // namespace fileapi
#endif // WEBKIT_FILEAPI_FILE_SYSTEM_QUOTA_UTIL_H_
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