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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "AlarmMonitor.h"
#include "AnomalyTracker.h"
namespace android {
namespace os {
namespace statsd {
using std::unordered_map;
class DurationAnomalyTracker : public virtual AnomalyTracker {
public:
DurationAnomalyTracker(const Alert& alert, const ConfigKey& configKey,
const sp<AlarmMonitor>& alarmMonitor);
virtual ~DurationAnomalyTracker();
// Sets an alarm for the given timestamp.
// Replaces previous alarm if one already exists.
void startAlarm(const MetricDimensionKey& dimensionKey, int64_t eventTime) override;
// Stops the alarm.
// If it should have already fired, but hasn't yet (e.g. because the AlarmManager is delayed),
// declare the anomaly now.
void stopAlarm(const MetricDimensionKey& dimensionKey, int64_t timestampNs) override;
// Stop all the alarms owned by this tracker. Does not declare any anomalies.
void cancelAllAlarms() override;
// Declares an anomaly for each alarm in firedAlarms that belongs to this DurationAnomalyTracker
// and removes it from firedAlarms. The AlarmMonitor is not informed.
// Note that this will generally be called from a different thread from the other functions;
// the caller is responsible for thread safety.
void informAlarmsFired(
int64_t timestampNs,
unordered_set<sp<const InternalAlarm>, SpHash<InternalAlarm>>& firedAlarms) override;
protected:
// Returns the alarm timestamp in seconds for the query dimension if it exists. Otherwise
// returns 0.
uint32_t getAlarmTimestampSec(const MetricDimensionKey& dimensionKey) const override {
auto it = mAlarms.find(dimensionKey);
return it == mAlarms.end() ? 0 : it->second->timestampSec;
}
// The alarms owned by this tracker. The alarm monitor also shares the alarm pointers when they
// are still active.
std::unordered_map<MetricDimensionKey, sp<const InternalAlarm>> mAlarms;
// Anomaly alarm monitor.
sp<AlarmMonitor> mAlarmMonitor;
FRIEND_TEST(OringDurationTrackerTest, TestPredictAnomalyTimestamp);
FRIEND_TEST(OringDurationTrackerTest, TestAnomalyDetectionExpiredAlarm);
FRIEND_TEST(OringDurationTrackerTest, TestAnomalyDetectionFiredAlarm);
FRIEND_TEST(OringDurationTrackerTest, TestClearStateKeyMapWhenBucketFull);
FRIEND_TEST(OringDurationTrackerTest, TestClearStateKeyMapWhenNoTrackers);
FRIEND_TEST(MaxDurationTrackerTest, TestAnomalyDetection);
FRIEND_TEST(MaxDurationTrackerTest, TestAnomalyPredictedTimestamp);
FRIEND_TEST(MaxDurationTrackerTest, TestAnomalyPredictedTimestamp_UpdatedOnStop);
};
} // namespace statsd
} // namespace os
} // namespace android
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