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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 WEBKIT_BROWSER_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_
#define WEBKIT_BROWSER_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_
#include <map>
#include <string>
#include "base/memory/weak_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "base/timer/timer.h"
#include "webkit/browser/webkit_storage_browser_export.h"
#include "webkit/common/quota/quota_types.h"
class GURL;
namespace quota {
class QuotaEvictionHandler;
struct UsageAndQuota;
class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE QuotaTemporaryStorageEvictor
: public base::NonThreadSafe {
public:
struct Statistics {
Statistics()
: num_errors_on_evicting_origin(0),
num_errors_on_getting_usage_and_quota(0),
num_evicted_origins(0),
num_eviction_rounds(0),
num_skipped_eviction_rounds(0) {}
int64 num_errors_on_evicting_origin;
int64 num_errors_on_getting_usage_and_quota;
int64 num_evicted_origins;
int64 num_eviction_rounds;
int64 num_skipped_eviction_rounds;
void subtract_assign(const Statistics& rhs) {
num_errors_on_evicting_origin -= rhs.num_errors_on_evicting_origin;
num_errors_on_getting_usage_and_quota -=
rhs.num_errors_on_getting_usage_and_quota;
num_evicted_origins -= rhs.num_evicted_origins;
num_eviction_rounds -= rhs.num_eviction_rounds;
num_skipped_eviction_rounds -= rhs.num_skipped_eviction_rounds;
}
};
struct EvictionRoundStatistics {
EvictionRoundStatistics();
bool in_round;
bool is_initialized;
base::Time start_time;
int64 usage_overage_at_round;
int64 diskspace_shortage_at_round;
int64 usage_on_beginning_of_round;
int64 usage_on_end_of_round;
int64 num_evicted_origins_in_round;
};
QuotaTemporaryStorageEvictor(
QuotaEvictionHandler* quota_eviction_handler,
int64 interval_ms);
virtual ~QuotaTemporaryStorageEvictor();
void GetStatistics(std::map<std::string, int64>* statistics);
void ReportPerRoundHistogram();
void ReportPerHourHistogram();
void Start();
int64 min_available_disk_space_to_start_eviction() {
return min_available_disk_space_to_start_eviction_;
}
void reset_min_available_disk_space_to_start_eviction() {
min_available_disk_space_to_start_eviction_ =
kMinAvailableDiskSpaceToStartEvictionNotSpecified;
}
void set_min_available_disk_space_to_start_eviction(int64 value) {
min_available_disk_space_to_start_eviction_ = value;
}
private:
friend class QuotaTemporaryStorageEvictorTest;
void StartEvictionTimerWithDelay(int delay_ms);
void ConsiderEviction();
void OnGotUsageAndQuotaForEviction(
QuotaStatusCode status,
const UsageAndQuota& quota_and_usage);
void OnGotLRUOrigin(const GURL& origin);
void OnEvictionComplete(QuotaStatusCode status);
void OnEvictionRoundStarted();
void OnEvictionRoundFinished();
// This is only used for tests.
void set_repeated_eviction(bool repeated_eviction) {
repeated_eviction_ = repeated_eviction;
}
static const int kMinAvailableDiskSpaceToStartEvictionNotSpecified;
int64 min_available_disk_space_to_start_eviction_;
// Not owned; quota_eviction_handler owns us.
QuotaEvictionHandler* quota_eviction_handler_;
Statistics statistics_;
Statistics previous_statistics_;
EvictionRoundStatistics round_statistics_;
base::Time time_of_end_of_last_nonskipped_round_;
base::Time time_of_end_of_last_round_;
int64 interval_ms_;
bool repeated_eviction_;
base::OneShotTimer<QuotaTemporaryStorageEvictor> eviction_timer_;
base::RepeatingTimer<QuotaTemporaryStorageEvictor> histogram_timer_;
base::WeakPtrFactory<QuotaTemporaryStorageEvictor> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(QuotaTemporaryStorageEvictor);
};
} // namespace quota
#endif // WEBKIT_BROWSER_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_