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/*
* Copyright 2018, 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 <gtest/gtest_prod.h>
#include "ConditionTracker.h"
#include "config/ConfigKey.h"
#include "frameworks/base/cmds/statsd/src/statsd_config.pb.h"
#include "stats_util.h"
namespace android {
namespace os {
namespace statsd {
class StateTracker : public virtual ConditionTracker {
public:
StateTracker(const ConfigKey& key, const int64_t& id, const int index,
const SimplePredicate& simplePredicate,
const std::unordered_map<int64_t, int>& trackerNameIndexMap,
const vector<Matcher> primaryKeys);
~StateTracker();
bool init(const std::vector<Predicate>& allConditionConfig,
const std::vector<sp<ConditionTracker>>& allConditionTrackers,
const std::unordered_map<int64_t, int>& conditionIdIndexMap,
std::vector<bool>& stack) override;
void evaluateCondition(const LogEvent& event,
const std::vector<MatchingState>& eventMatcherValues,
const std::vector<sp<ConditionTracker>>& mAllConditions,
std::vector<ConditionState>& conditionCache,
std::vector<bool>& changedCache) override;
/**
* Note: dimensionFields will be ignored in StateTracker, because we demand metrics
* must take the entire dimension fields from StateTracker. This is to make implementation
* simple and efficient.
*
* For example: wakelock duration by uid process states:
* dimension in condition must be {uid, process state}.
*/
void isConditionMet(const ConditionKey& conditionParameters,
const std::vector<sp<ConditionTracker>>& allConditions,
const vector<Matcher>& dimensionFields,
const bool isSubOutputDimensionFields,
const bool isPartialLink,
std::vector<ConditionState>& conditionCache,
std::unordered_set<HashableDimensionKey>& dimensionsKeySet) const override;
/**
* Note: dimensionFields will be ignored in StateTracker, because we demand metrics
* must take the entire dimension fields from StateTracker. This is to make implementation
* simple and efficient.
*/
ConditionState getMetConditionDimension(
const std::vector<sp<ConditionTracker>>& allConditions,
const vector<Matcher>& dimensionFields,
const bool isSubOutputDimensionFields,
std::unordered_set<HashableDimensionKey>& dimensionsKeySet) const override;
virtual const std::set<HashableDimensionKey>* getChangedToTrueDimensions(
const std::vector<sp<ConditionTracker>>& allConditions) const {
return &mLastChangedToTrueDimensions;
}
virtual const std::set<HashableDimensionKey>* getChangedToFalseDimensions(
const std::vector<sp<ConditionTracker>>& allConditions) const {
return &mLastChangedToFalseDimensions;
}
bool IsChangedDimensionTrackable() const override { return true; }
bool IsSimpleCondition() const override { return true; }
bool equalOutputDimensions(
const std::vector<sp<ConditionTracker>>& allConditions,
const vector<Matcher>& dimensions) const override {
return equalDimensions(mOutputDimensions, dimensions);
}
void getTrueSlicedDimensions(
const std::vector<sp<ConditionTracker>>& allConditions,
std::set<HashableDimensionKey>* dimensions) const override {
for (const auto& itr : mSlicedState) {
dimensions->insert(itr.second);
}
}
private:
const ConfigKey mConfigKey;
// The index of the LogEventMatcher which defines the start.
int mStartLogMatcherIndex;
std::set<HashableDimensionKey> mLastChangedToTrueDimensions;
std::set<HashableDimensionKey> mLastChangedToFalseDimensions;
std::vector<Matcher> mOutputDimensions;
std::vector<Matcher> mPrimaryKeys;
ConditionState mInitialValue;
int mDimensionTag;
void dumpState();
bool hitGuardRail(const HashableDimensionKey& newKey);
// maps from [primary_key] to [primary_key, exclusive_state].
std::unordered_map<HashableDimensionKey, HashableDimensionKey> mSlicedState;
FRIEND_TEST(StateTrackerTest, TestStateChange);
};
} // namespace statsd
} // namespace os
} // namespace android
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