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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 "binder/IBinder.h"
#include "config/ConfigKey.h"
#include "config/ConfigListener.h"
#include <map>
#include <mutex>
#include <string>
#include <stdio.h>
namespace android {
namespace os {
namespace statsd {
/**
* Keeps track of which configurations have been set from various sources.
*/
class ConfigManager : public virtual android::RefBase {
public:
ConfigManager();
virtual ~ConfigManager();
/**
* Initialize ConfigListener by reading from disk and get updates.
*/
void Startup();
/*
* No-op initializer for tests.
*/
void StartupForTest();
/**
* Someone else wants to know about the configs.
*/
void AddListener(const sp<ConfigListener>& listener);
/**
* A configuration was added or updated.
*
* Reports this to listeners.
*/
void UpdateConfig(const ConfigKey& key, const StatsdConfig& data);
/**
* Sets the broadcast receiver for a configuration key.
*/
void SetConfigReceiver(const ConfigKey& key, const sp<IBinder>& intentSender);
/**
* Returns the package name and class name representing the broadcast receiver for this config.
*/
const sp<android::IBinder> GetConfigReceiver(const ConfigKey& key) const;
/**
* Returns all config keys registered.
*/
std::vector<ConfigKey> GetAllConfigKeys() const;
/**
* Erase any broadcast receiver associated with this config key.
*/
void RemoveConfigReceiver(const ConfigKey& key);
/**
* Sets the broadcast receiver that is notified whenever the list of active configs
* changes for this uid.
*/
void SetActiveConfigsChangedReceiver(const int uid, const sp<IBinder>& intentSender);
/**
* Returns the broadcast receiver for active configs changed for this uid.
*/
const sp<IBinder> GetActiveConfigsChangedReceiver(const int uid) const;
/**
* Erase any active configs changed broadcast receiver associated with this uid.
*/
void RemoveActiveConfigsChangedReceiver(const int uid);
/**
* A configuration was removed.
*
* Reports this to listeners.
*/
void RemoveConfig(const ConfigKey& key);
/**
* Remove all of the configs for the given uid.
*/
void RemoveConfigs(int uid);
/**
* Remove all of the configs from memory.
*/
void RemoveAllConfigs();
/**
* Text dump of our state for debugging.
*/
void Dump(FILE* out);
private:
mutable std::mutex mMutex;
/**
* Save the configs to disk.
*/
void update_saved_configs_locked(const ConfigKey& key,
const std::vector<uint8_t>& buffer,
const int numBytes);
/**
* Remove saved configs from disk.
*/
void remove_saved_configs(const ConfigKey& key);
/**
* Maps from uid to the config keys that have been set.
*/
std::map<int, std::set<ConfigKey>> mConfigs;
/**
* Each config key can be subscribed by up to one receiver, specified as IBinder from
* PendingIntent.
*/
std::map<ConfigKey, sp<android::IBinder>> mConfigReceivers;
/**
* Each uid can be subscribed by up to one receiver to notify that the list of active configs
* for this uid has changed. The receiver is specified as IBinder from PendingIntent.
*/
std::map<int, sp<android::IBinder>> mActiveConfigsChangedReceivers;
/**
* The ConfigListeners that will be told about changes.
*/
std::vector<sp<ConfigListener>> mListeners;
};
} // namespace statsd
} // namespace os
} // namespace android
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