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// Copyright 2014 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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
#include "base/callback.h"
#include "base/location.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/sync_file_system/sync_callbacks.h"
#include "chrome/browser/sync_file_system/task_logger.h"
namespace sync_file_system {
namespace drive_backend {
class SyncTaskManager;
struct TaskBlocker;
// Represents a running sequence of SyncTasks. Owned by a callback chain that
// should run exclusively, and held by SyncTaskManager when no task is running.
class SyncTaskToken {
public:
static const int64 kTestingTaskTokenID;
static const int64 kForegroundTaskTokenID;
static const int64 kMinimumBackgroundTaskTokenID;
static scoped_ptr<SyncTaskToken> CreateForTesting(
const SyncStatusCallback& callback);
static scoped_ptr<SyncTaskToken> CreateForForegroundTask(
const base::WeakPtr<SyncTaskManager>& manager,
base::SequencedTaskRunner* task_runner);
static scoped_ptr<SyncTaskToken> CreateForBackgroundTask(
const base::WeakPtr<SyncTaskManager>& manager,
base::SequencedTaskRunner* task_runner,
int64 token_id,
scoped_ptr<TaskBlocker> task_blocker);
void UpdateTask(const tracked_objects::Location& location,
const SyncStatusCallback& callback);
const tracked_objects::Location& location() const { return location_; }
virtual ~SyncTaskToken();
static SyncStatusCallback WrapToCallback(scoped_ptr<SyncTaskToken> token);
SyncTaskManager* manager() { return manager_.get(); }
const SyncStatusCallback& callback() const { return callback_; }
void clear_callback() { callback_.Reset(); }
void set_task_blocker(scoped_ptr<TaskBlocker> task_blocker);
const TaskBlocker* task_blocker() const;
void clear_task_blocker();
int64 token_id() const { return token_id_; }
void InitializeTaskLog(const std::string& task_description);
void FinalizeTaskLog(const std::string& result_description);
void RecordLog(const std::string& message);
bool has_task_log() const { return task_log_; }
void SetTaskLog(scoped_ptr<TaskLogger::TaskLog> task_log);
scoped_ptr<TaskLogger::TaskLog> PassTaskLog();
private:
SyncTaskToken(const base::WeakPtr<SyncTaskManager>& manager,
const scoped_refptr<base::SequencedTaskRunner>& task_runner,
int64 token_id,
scoped_ptr<TaskBlocker> task_blocker,
const SyncStatusCallback& callback);
base::WeakPtr<SyncTaskManager> manager_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
tracked_objects::Location location_;
int64 token_id_;
SyncStatusCallback callback_;
scoped_ptr<TaskLogger::TaskLog> task_log_;
scoped_ptr<TaskBlocker> task_blocker_;
DISALLOW_COPY_AND_ASSIGN(SyncTaskToken);
};
} // namespace drive_backend
} // namespace sync_file_system
#endif // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
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