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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 <utils/JenkinsHash.h>
#include <vector>
#include "FieldValue.h"
#include "android-base/stringprintf.h"
#include "logd/LogEvent.h"
namespace android {
namespace os {
namespace statsd {
using android::base::StringPrintf;
struct Metric2Condition {
int64_t conditionId;
std::vector<Matcher> metricFields;
std::vector<Matcher> conditionFields;
};
class HashableDimensionKey {
public:
explicit HashableDimensionKey(const std::vector<FieldValue>& values) {
mValues = values;
}
HashableDimensionKey() {};
HashableDimensionKey(const HashableDimensionKey& that) : mValues(that.getValues()){};
inline void addValue(const FieldValue& value) {
mValues.push_back(value);
}
inline const std::vector<FieldValue>& getValues() const {
return mValues;
}
inline std::vector<FieldValue>* mutableValues() {
return &mValues;
}
inline FieldValue* mutableValue(size_t i) {
if (i >= 0 && i < mValues.size()) {
return &(mValues[i]);
}
return nullptr;
}
std::string toString() const;
bool operator==(const HashableDimensionKey& that) const;
bool operator<(const HashableDimensionKey& that) const;
bool contains(const HashableDimensionKey& that) const;
private:
std::vector<FieldValue> mValues;
};
class MetricDimensionKey {
public:
explicit MetricDimensionKey(const HashableDimensionKey& dimensionKeyInWhat,
const HashableDimensionKey& dimensionKeyInCondition)
: mDimensionKeyInWhat(dimensionKeyInWhat),
mDimensionKeyInCondition(dimensionKeyInCondition) {};
MetricDimensionKey(){};
MetricDimensionKey(const MetricDimensionKey& that)
: mDimensionKeyInWhat(that.getDimensionKeyInWhat()),
mDimensionKeyInCondition(that.getDimensionKeyInCondition()) {};
MetricDimensionKey& operator=(const MetricDimensionKey& from) = default;
std::string toString() const;
inline const HashableDimensionKey& getDimensionKeyInWhat() const {
return mDimensionKeyInWhat;
}
inline const HashableDimensionKey& getDimensionKeyInCondition() const {
return mDimensionKeyInCondition;
}
inline void setDimensionKeyInCondition(const HashableDimensionKey& key) {
mDimensionKeyInCondition = key;
}
bool hasDimensionKeyInCondition() const {
return mDimensionKeyInCondition.getValues().size() > 0;
}
bool operator==(const MetricDimensionKey& that) const;
bool operator<(const MetricDimensionKey& that) const;
private:
HashableDimensionKey mDimensionKeyInWhat;
HashableDimensionKey mDimensionKeyInCondition;
};
android::hash_t hashDimension(const HashableDimensionKey& key);
/**
* Creating HashableDimensionKeys from FieldValues using matcher.
*
* This function may make modifications to the Field if the matcher has Position=FIRST,LAST or ALL
* in it. This is because: for example, when we create dimension from last uid in attribution chain,
* In one event, uid 1000 is at position 5 and it's the last
* In another event, uid 1000 is at position 6, and it's the last
* these 2 events should be mapped to the same dimension. So we will remove the original position
* from the dimension key for the uid field (by applying 0x80 bit mask).
*/
bool filterValues(const std::vector<Matcher>& matcherFields, const std::vector<FieldValue>& values,
HashableDimensionKey* output);
/**
* Filter the values from FieldValues using the matchers.
*
* In contrast to the above function, this function will not do any modification to the original
* data. Considering it as taking a snapshot on the atom event.
*/
void filterGaugeValues(const std::vector<Matcher>& matchers, const std::vector<FieldValue>& values,
std::vector<FieldValue>* output);
void getDimensionForCondition(const std::vector<FieldValue>& eventValues,
const Metric2Condition& links,
HashableDimensionKey* conditionDimension);
} // namespace statsd
} // namespace os
} // namespace android
namespace std {
using android::os::statsd::HashableDimensionKey;
using android::os::statsd::MetricDimensionKey;
template <>
struct hash<HashableDimensionKey> {
std::size_t operator()(const HashableDimensionKey& key) const {
return hashDimension(key);
}
};
template <>
struct hash<MetricDimensionKey> {
std::size_t operator()(const MetricDimensionKey& key) const {
android::hash_t hash = hashDimension(key.getDimensionKeyInWhat());
hash = android::JenkinsHashMix(hash, hashDimension(key.getDimensionKeyInCondition()));
return android::JenkinsHashWhiten(hash);
}
};
} // namespace std
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