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/* Copyright (c) 2015-2017, 2020 The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation, nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __SYSTEM_STATUS_OSOBSERVER__
#define __SYSTEM_STATUS_OSOBSERVER__
#include <cinttypes>
#include <string>
#include <list>
#include <map>
#include <new>
#include <vector>
#include <MsgTask.h>
#include <DataItemId.h>
#include <IOsObserver.h>
#include <loc_pla.h>
#include <log_util.h>
#include <LocUnorderedSetMap.h>
namespace loc_core
{
/******************************************************************************
SystemStatusOsObserver
******************************************************************************/
using namespace std;
using namespace loc_util;
// Forward Declarations
class IDataItemCore;
class SystemStatus;
class SystemStatusOsObserver;
typedef map<IDataItemObserver*, list<DataItemId>> ObserverReqCache;
typedef LocUnorderedSetMap<IDataItemObserver*, DataItemId> ClientToDataItems;
typedef LocUnorderedSetMap<DataItemId, IDataItemObserver*> DataItemToClients;
typedef unordered_map<DataItemId, IDataItemCore*> DataItemIdToCore;
typedef unordered_map<DataItemId, int> DataItemIdToInt;
#ifdef USE_GLIB
// Cache details of backhaul client requests
typedef unordered_set<string> ClientBackhaulReqCache;
#endif
struct ObserverContext {
IDataItemSubscription* mSubscriptionObj;
IFrameworkActionReq* mFrameworkActionReqObj;
const MsgTask* mMsgTask;
SystemStatusOsObserver* mSSObserver;
inline ObserverContext(const MsgTask* msgTask, SystemStatusOsObserver* observer) :
mSubscriptionObj(NULL), mFrameworkActionReqObj(NULL),
mMsgTask(msgTask), mSSObserver(observer) {}
};
// Clients wanting to get data from OS/Framework would need to
// subscribe with OSObserver using IDataItemSubscription interface.
// Such clients would need to implement IDataItemObserver interface
// to receive data when it becomes available.
class SystemStatusOsObserver : public IOsObserver {
public:
// ctor
inline SystemStatusOsObserver(SystemStatus* systemstatus, const MsgTask* msgTask) :
mSystemStatus(systemstatus), mContext(msgTask, this),
mAddress("SystemStatusOsObserver"),
mClientToDataItems(MAX_DATA_ITEM_ID), mDataItemToClients(MAX_DATA_ITEM_ID) {}
// dtor
~SystemStatusOsObserver();
template <typename CINT, typename COUT>
static COUT containerTransfer(CINT& s);
template <typename CINT, typename COUT>
inline static COUT containerTransfer(CINT&& s) {
return containerTransfer<CINT, COUT>(s);
}
// To set the subscription object
virtual void setSubscriptionObj(IDataItemSubscription* subscriptionObj);
// To set the framework action request object
inline void setFrameworkActionReqObj(IFrameworkActionReq* frameworkActionReqObj) {
mContext.mFrameworkActionReqObj = frameworkActionReqObj;
#ifdef USE_GLIB
uint32_t numBackHaulClients = mBackHaulConnReqCache.size();
if (numBackHaulClients > 0) {
// For each client, invoke connectbackhaul.
for (auto clientName : mBackHaulConnReqCache) {
LOC_LOGd("Invoke connectBackhaul for client: %s", clientName.c_str());
connectBackhaul(clientName);
}
// Clear the set
mBackHaulConnReqCache.clear();
}
#endif
}
// IDataItemSubscription Overrides
inline virtual void subscribe(const list<DataItemId>& l, IDataItemObserver* client) override {
subscribe(l, client, false);
}
virtual void updateSubscription(const list<DataItemId>& l, IDataItemObserver* client) override;
inline virtual void requestData(const list<DataItemId>& l, IDataItemObserver* client) override {
subscribe(l, client, true);
}
virtual void unsubscribe(const list<DataItemId>& l, IDataItemObserver* client) override;
virtual void unsubscribeAll(IDataItemObserver* client) override;
// IDataItemObserver Overrides
virtual void notify(const list<IDataItemCore*>& dlist) override;
inline virtual void getName(string& name) override {
name = mAddress;
}
// IFrameworkActionReq Overrides
virtual void turnOn(DataItemId dit, int timeOut = 0) override;
virtual void turnOff(DataItemId dit) override;
#ifdef USE_GLIB
virtual bool connectBackhaul(const string& clientName) override;
virtual bool disconnectBackhaul(const string& clientName) override;
#endif
private:
SystemStatus* mSystemStatus;
ObserverContext mContext;
const string mAddress;
ClientToDataItems mClientToDataItems;
DataItemToClients mDataItemToClients;
DataItemIdToCore mDataItemCache;
DataItemIdToInt mActiveRequestCount;
// Cache the subscribe and requestData till subscription obj is obtained
void cacheObserverRequest(ObserverReqCache& reqCache,
const list<DataItemId>& l, IDataItemObserver* client);
#ifdef USE_GLIB
// Cache the framework action request for connect/disconnect
ClientBackhaulReqCache mBackHaulConnReqCache;
#endif
void subscribe(const list<DataItemId>& l, IDataItemObserver* client, bool toRequestData);
// Helpers
void sendCachedDataItems(const unordered_set<DataItemId>& s, IDataItemObserver* to);
bool updateCache(IDataItemCore* d);
inline void logMe(const unordered_set<DataItemId>& l) {
IF_LOC_LOGD {
for (auto id : l) {
LOC_LOGD("DataItem %d", id);
}
}
}
};
} // namespace loc_core
#endif //__SYSTEM_STATUS__
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