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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 STORAGE_BROWSER_QUOTA_USAGE_TRACKER_H_
#define STORAGE_BROWSER_QUOTA_USAGE_TRACKER_H_
#include <stdint.h>
#include <map>
#include <set>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "storage/browser/quota/quota_callbacks.h"
#include "storage/browser/quota/quota_client.h"
#include "storage/browser/quota/quota_task.h"
#include "storage/browser/quota/special_storage_policy.h"
#include "storage/browser/storage_browser_export.h"
#include "storage/common/quota/quota_types.h"
#include "url/gurl.h"
namespace storage {
class ClientUsageTracker;
class StorageMonitor;
// A helper class that gathers and tracks the amount of data stored in
// all quota clients.
// An instance of this class is created per storage type.
class STORAGE_EXPORT UsageTracker : public QuotaTaskObserver {
public:
UsageTracker(const QuotaClientList& clients, StorageType type,
SpecialStoragePolicy* special_storage_policy,
StorageMonitor* storage_monitor);
~UsageTracker() override;
StorageType type() const { return type_; }
ClientUsageTracker* GetClientTracker(QuotaClient::ID client_id);
void GetGlobalLimitedUsage(const UsageCallback& callback);
void GetGlobalUsage(const GlobalUsageCallback& callback);
void GetHostUsage(const std::string& host, const UsageCallback& callback);
void UpdateUsageCache(QuotaClient::ID client_id,
const GURL& origin,
int64_t delta);
void GetCachedOriginsUsage(std::map<GURL, int64_t>* origin_usage) const;
void GetCachedHostsUsage(std::map<std::string, int64_t>* host_usage) const;
void GetCachedOrigins(std::set<GURL>* origins) const;
bool IsWorking() const {
return global_usage_callbacks_.HasCallbacks() ||
host_usage_callbacks_.HasAnyCallbacks();
}
void SetUsageCacheEnabled(QuotaClient::ID client_id,
const GURL& origin,
bool enabled);
private:
struct AccumulateInfo {
AccumulateInfo() : pending_clients(0), usage(0), unlimited_usage(0) {}
int pending_clients;
int64_t usage;
int64_t unlimited_usage;
};
typedef std::map<QuotaClient::ID, ClientUsageTracker*> ClientTrackerMap;
typedef CallbackQueue<UsageCallback, int64_t> UsageCallbackQueue;
typedef CallbackQueue<GlobalUsageCallback, int64_t, int64_t>
GlobalUsageCallbackQueue;
typedef CallbackQueueMap<UsageCallback, std::string, int64_t>
HostUsageCallbackMap;
friend class ClientUsageTracker;
void AccumulateClientGlobalLimitedUsage(AccumulateInfo* info,
int64_t limited_usage);
void AccumulateClientGlobalUsage(AccumulateInfo* info,
int64_t usage,
int64_t unlimited_usage);
void AccumulateClientHostUsage(AccumulateInfo* info,
const std::string& host,
int64_t usage);
const StorageType type_;
ClientTrackerMap client_tracker_map_;
UsageCallbackQueue global_limited_usage_callbacks_;
GlobalUsageCallbackQueue global_usage_callbacks_;
HostUsageCallbackMap host_usage_callbacks_;
StorageMonitor* storage_monitor_;
base::WeakPtrFactory<UsageTracker> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(UsageTracker);
};
} // namespace storage
#endif // STORAGE_BROWSER_QUOTA_USAGE_TRACKER_H_
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