Bookatz | c697797 | 2018-01-16 16:55:05 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #pragma once |
| 18 | |
| 19 | #include <android/os/IStatsCompanionService.h> |
| 20 | #include <utils/RefBase.h> |
| 21 | |
| 22 | #include "config/ConfigKey.h" |
| 23 | #include "frameworks/base/cmds/statsd/src/statsd_config.pb.h" // subscription |
| 24 | #include "frameworks/base/cmds/statsd/src/stats_log.pb.h" // DimensionsValue |
| 25 | #include "android/os/StatsDimensionsValue.h" |
| 26 | #include "HashableDimensionKey.h" |
| 27 | |
| 28 | #include <mutex> |
| 29 | #include <unordered_map> |
| 30 | |
| 31 | namespace android { |
| 32 | namespace os { |
| 33 | namespace statsd { |
| 34 | |
| 35 | // Reports information to subscribers. |
| 36 | // Single instance shared across the process. All methods are thread safe. |
| 37 | class SubscriberReporter { |
| 38 | public: |
| 39 | /** Get (singleton) instance of SubscriberReporter. */ |
| 40 | static SubscriberReporter& getInstance() { |
| 41 | static SubscriberReporter subscriberReporter; |
| 42 | return subscriberReporter; |
| 43 | } |
| 44 | |
| 45 | ~SubscriberReporter(){}; |
| 46 | SubscriberReporter(SubscriberReporter const&) = delete; |
| 47 | void operator=(SubscriberReporter const&) = delete; |
| 48 | |
| 49 | /** |
| 50 | * Tells SubscriberReporter what IStatsCompanionService to use. |
| 51 | * May be nullptr, but SubscriberReporter will not send broadcasts for any calls |
| 52 | * to alertBroadcastSubscriber that occur while nullptr. |
| 53 | */ |
| 54 | void setStatsCompanionService(sp<IStatsCompanionService> statsCompanionService) { |
| 55 | std::lock_guard<std::mutex> lock(mLock); |
| 56 | sp<IStatsCompanionService> tmpForLock = mStatsCompanionService; |
| 57 | mStatsCompanionService = statsCompanionService; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Stores the given intentSender, associating it with the given (configKey, subscriberId) pair. |
| 62 | * intentSender must be convertible into an IntentSender (in Java) using IntentSender(IBinder). |
| 63 | */ |
| 64 | void setBroadcastSubscriber(const ConfigKey& configKey, |
| 65 | int64_t subscriberId, |
| 66 | const sp<android::IBinder>& intentSender); |
| 67 | |
| 68 | /** |
| 69 | * Erases any intentSender information from the given (configKey, subscriberId) pair. |
| 70 | */ |
| 71 | void unsetBroadcastSubscriber(const ConfigKey& configKey, int64_t subscriberId); |
| 72 | |
| 73 | /** Remove all information stored by SubscriberReporter about the given config. */ |
| 74 | void removeConfig(const ConfigKey& configKey); |
| 75 | |
| 76 | /** |
| 77 | * Sends a broadcast via the intentSender previously stored for the |
| 78 | * given (configKey, subscriberId) pair by setBroadcastSubscriber. |
| 79 | * Information about the subscriber, as well as information extracted from the dimKey, is sent. |
| 80 | */ |
| 81 | void alertBroadcastSubscriber(const ConfigKey& configKey, |
| 82 | const Subscription& subscription, |
| 83 | const HashableDimensionKey& dimKey) const; |
| 84 | |
| 85 | private: |
| 86 | SubscriberReporter() {}; |
| 87 | |
| 88 | mutable std::mutex mLock; |
| 89 | |
| 90 | /** Binder interface for communicating with StatsCompanionService. */ |
| 91 | sp<IStatsCompanionService> mStatsCompanionService = nullptr; |
| 92 | |
| 93 | /** Maps <ConfigKey, SubscriberId> -> IBinder (which represents an IIntentSender). */ |
| 94 | std::unordered_map<ConfigKey, |
| 95 | std::unordered_map<int64_t, sp<android::IBinder>>> mIntentMap; |
| 96 | |
| 97 | /** |
| 98 | * Sends a broadcast via the given intentSender (using mStatsCompanionService), along |
| 99 | * with the information in the other parameters. |
| 100 | */ |
| 101 | void sendBroadcastLocked(const sp<android::IBinder>& intentSender, |
| 102 | const ConfigKey& configKey, |
| 103 | const Subscription& subscription, |
| 104 | const HashableDimensionKey& dimKey) const; |
| 105 | |
| 106 | /** Converts a stats_log.proto DimensionsValue to a StatsDimensionsValue. */ |
| 107 | static StatsDimensionsValue protoToStatsDimensionsValue( |
| 108 | const DimensionsValue& protoDimsVal); |
| 109 | |
| 110 | /** Converts a HashableDimensionKey to a StatsDimensionsValue. */ |
| 111 | static StatsDimensionsValue protoToStatsDimensionsValue( |
| 112 | const HashableDimensionKey& dimKey); |
| 113 | }; |
| 114 | |
| 115 | } // namespace statsd |
| 116 | } // namespace os |
| 117 | } // namespace android |