| /* |
| * 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 "condition/ConditionTracker.h" |
| #include "frameworks/base/cmds/statsd/src/statsd_config.pb.h" |
| #include "logd/LogEvent.h" |
| #include "matchers/LogMatchingTracker.h" |
| #include "metrics/MetricProducer.h" |
| |
| #include <unordered_map> |
| |
| namespace android { |
| namespace os { |
| namespace statsd { |
| |
| // A MetricsManager is responsible for managing metrics from one single config source. |
| class MetricsManager { |
| public: |
| MetricsManager(const StatsdConfig& config); |
| |
| ~MetricsManager(); |
| |
| // Return whether the configuration is valid. |
| bool isConfigValid() const; |
| |
| void onLogEvent(const LogEvent& event); |
| |
| // Called when everything should wrap up. We are about to finish (e.g., new config comes). |
| void finish(); |
| |
| // Config source owner can call onDumpReport() to get all the metrics collected. |
| std::vector<std::unique_ptr<std::vector<uint8_t>>> onDumpReport(); |
| |
| size_t byteSize(); |
| |
| private: |
| // All event tags that are interesting to my metrics. |
| std::set<int> mTagIds; |
| |
| // We only store the sp of LogMatchingTracker, MetricProducer, and ConditionTracker in |
| // MetricsManager. There are relationships between them, and the relationships are denoted by |
| // index instead of pointers. The reasons for this are: (1) the relationship between them are |
| // complicated, so storing index instead of pointers reduces the risk that A holds B's sp, and B |
| // holds A's sp. (2) When we evaluate matcher results, or condition results, we can quickly get |
| // the related results from a cache using the index. |
| |
| // Hold all the log entry matchers from the config. |
| std::vector<sp<LogMatchingTracker>> mAllLogEntryMatchers; |
| |
| // Hold all the conditions from the config. |
| std::vector<sp<ConditionTracker>> mAllConditionTrackers; |
| |
| // Hold all metrics from the config. |
| std::vector<sp<MetricProducer>> mAllMetricProducers; |
| |
| // To make the log processing more efficient, we want to do as much filtering as possible |
| // before we go into individual trackers and conditions to match. |
| |
| // 1st filter: check if the event tag id is in mTagIds. |
| // 2nd filter: if it is, we parse the event because there is at least one member is interested. |
| // then pass to all LogMatchingTrackers (itself also filter events by ids). |
| // 3nd filter: for LogMatchingTrackers that matched this event, we pass this event to the |
| // ConditionTrackers and MetricProducers that use this matcher. |
| // 4th filter: for ConditionTrackers that changed value due to this event, we pass |
| // new conditions to metrics that use this condition. |
| |
| // The following map is initialized from the statsd_config. |
| |
| // maps from the index of the LogMatchingTracker to index of MetricProducer. |
| std::unordered_map<int, std::vector<int>> mTrackerToMetricMap; |
| |
| // maps from LogMatchingTracker to ConditionTracker |
| std::unordered_map<int, std::vector<int>> mTrackerToConditionMap; |
| |
| // maps from ConditionTracker to MetricProducer |
| std::unordered_map<int, std::vector<int>> mConditionToMetricMap; |
| |
| bool mConfigValid; |
| }; |
| |
| } // namespace statsd |
| } // namespace os |
| } // namespace android |