Add DataItemObserver interface in SystemStatus
Add DataItemObserver interface in SystemStatus so
that clients can subscribe dataitem events from
SystemStatus. Also moving DateItem and its observer,
subscription classes into HAL
Simplify DataItem class implementation.
Change-Id: I7b2c3fc9dcf67dd6132bbcccda874e3f7ed6fa94
CRs-Fixed: 2041019 2072896
diff --git a/core/SystemStatusOsObserver.cpp b/core/SystemStatusOsObserver.cpp
new file mode 100644
index 0000000..e327f93
--- /dev/null
+++ b/core/SystemStatusOsObserver.cpp
@@ -0,0 +1,646 @@
+/* Copyright (c) 2015-2017, 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.
+ *
+ */
+#define LOG_TAG "LocSvc_SystemStatusOsObserver"
+
+#include <string>
+#include <cinttypes>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <pthread.h>
+#include <iterator>
+#include <algorithm>
+
+#include <MsgTask.h>
+#include <SystemStatusOsObserver.h>
+
+#include <DataItemId.h>
+#include <IDataItemCore.h>
+#include <IClientIndex.h>
+#include <IDataItemIndex.h>
+#include <IndexFactory.h>
+
+#include <DataItemsFactoryProxy.h>
+
+#include <platform_lib_log_util.h>
+
+namespace loc_core
+{
+#define BREAK_IF_ZERO(ERR,X) if(0==(X)) {result = (ERR); break;}
+#define BREAK_IF_NON_ZERO(ERR,X) if(0!=(X)) {result = (ERR); break;}
+
+SystemStatusOsObserver::SystemStatusOsObserver(const MsgTask* msgTask) :
+ mAddress ("SystemStatusOsObserver"),
+ mClientIndex(IndexFactory <IDataItemObserver *, DataItemId> :: createClientIndex ()),
+ mDataItemIndex(IndexFactory <IDataItemObserver *, DataItemId> :: createDataItemIndex ())
+{
+ int result = -1;
+ ENTRY_LOG ();
+ do {
+ BREAK_IF_ZERO (1, mClientIndex);
+ BREAK_IF_ZERO (2, mDataItemIndex);
+ mContext.mMsgTask = msgTask;
+ result = 0;
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+SystemStatusOsObserver :: ~SystemStatusOsObserver ()
+{
+ // Close data-item library handle
+ DataItemsFactoryProxy::closeDataItemLibraryHandle();
+
+ // Destroy cache
+ map <DataItemId, IDataItemCore *> :: iterator citer = mDataItemCache.begin ();
+ for (; citer != mDataItemCache.end (); ++citer) {
+ if (citer->second != NULL) { delete citer->second; }
+ }
+ mDataItemCache.clear ();
+ delete mClientIndex;
+ delete mDataItemIndex;
+ mClientIndex = NULL;
+ mDataItemIndex = NULL;
+}
+
+/******************************************************************************
+ Message proc
+******************************************************************************/
+void SystemStatusOsObserver :: HandleSubscribeReq :: proc () const {
+
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mDataItemList.empty ()) {
+ LOC_LOGV("mDataItemList is empty. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+ //mDataItemList.sort ();
+ // Handle First Response
+ list <DataItemId> pendingFirstResponseList;
+ this->mParent->mClientIndex->add (this->mClient, mDataItemList, pendingFirstResponseList);
+
+ // Do not send first response for only pendingFirstResponseList,
+ // instead send for all the data items (present in the cache) that
+ // have been subscribed for each time.
+ this->mParent->sendFirstResponse (mDataItemList, this->mClient);
+
+ list <DataItemId> yetToSubscribeDataItemsList;
+ this->mParent->mDataItemIndex->add (this->mClient, mDataItemList, yetToSubscribeDataItemsList);
+ // Send subscription list to framework
+ if (!yetToSubscribeDataItemsList.empty ()) {
+ this->mParent->mContext.mSubscriptionObj->subscribe
+ (
+ yetToSubscribeDataItemsList,
+ this->mParent
+ );
+ LOC_LOGD ("Subscribe Request sent to framework for the following data items");
+ this->mParent->logMe (yetToSubscribeDataItemsList);
+ }
+
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+ return;
+}
+
+void SystemStatusOsObserver :: HandleUpdateSubscriptionReq :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mDataItemList.empty ()) {
+ LOC_LOGV("mDataItemList is empty. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+ //mDataItemList.sort ();
+ list <DataItemId> currentlySubscribedList;
+ this->mParent->mClientIndex->getSubscribedList (this->mClient, currentlySubscribedList);
+ list <DataItemId> removeDataItemList;
+ set_difference (currentlySubscribedList.begin (), currentlySubscribedList.end (),
+ mDataItemList.begin (), mDataItemList.end (),
+ inserter (removeDataItemList,removeDataItemList.begin ()));
+ // Handle First Response
+ list <DataItemId> pendingFirstResponseList;
+ this->mParent->mClientIndex->add (this->mClient, mDataItemList, pendingFirstResponseList);
+ // Send First Response
+ this->mParent->sendFirstResponse (pendingFirstResponseList, this->mClient);
+
+ list <DataItemId> yetToSubscribeDataItemsList;
+ this->mParent->mDataItemIndex->add (this->mClient, mDataItemList, yetToSubscribeDataItemsList);
+ // Send subscription list to framework
+ if (!yetToSubscribeDataItemsList.empty ()) {
+ this->mParent->mContext.mSubscriptionObj->subscribe
+ (
+ yetToSubscribeDataItemsList,
+ this->mParent
+ );
+ LOC_LOGD ("Subscribe Request sent to framework for the following data items");
+ this->mParent->logMe (yetToSubscribeDataItemsList);
+ }
+
+ list <DataItemId> unsubscribeList;
+ list <DataItemId> unused;
+ this->mParent->mClientIndex->remove (this->mClient, removeDataItemList, unused);
+
+ if (!this->mParent->mClientIndex->isSubscribedClient (this->mClient)) {
+ this->mParent->mDataItemIndex->remove (list <IDataItemObserver *> (1,this->mClient), unsubscribeList);
+ }
+ if (!unsubscribeList.empty ()) {
+ // Send unsubscribe to framework
+ this->mParent->mContext.mSubscriptionObj->unsubscribe
+ (
+ unsubscribeList,
+ this->mParent
+ );
+ LOC_LOGD ("Unsubscribe Request sent to framework for the following data items");
+ this->mParent->logMe (unsubscribeList);
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: HandleRequestData :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+
+ do {
+ if (mDataItemList.empty ()) {
+ LOC_LOGV("mDataItemList is empty. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+ //mDataItemList.sort ();
+ list <DataItemId> yetToSubscribeDataItemsList;
+ this->mParent->mClientIndex->add (this->mClient, mDataItemList, yetToSubscribeDataItemsList);
+ this->mParent->mDataItemIndex->add (this->mClient, mDataItemList, yetToSubscribeDataItemsList);
+ // Send subscription list to framework
+ if (!mDataItemList.empty ()) {
+ this->mParent->mContext.mSubscriptionObj->requestData
+ (
+ mDataItemList,
+ this->mParent
+ );
+ LOC_LOGD ("Subscribe Request sent to framework for the following data items");
+ this->mParent->logMe (yetToSubscribeDataItemsList);
+ }
+
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: HandleUnsubscribeReq :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mDataItemList.empty ()) {
+ LOC_LOGV("mDataItemList is empty. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+ //mDataItemList.sort ();
+ list <DataItemId> unsubscribeList;
+ list <DataItemId> unused;
+ this->mParent->mClientIndex->remove (this->mClient, mDataItemList, unused);
+
+ list <DataItemId> :: const_iterator it = mDataItemList.begin ();
+ for (; it != mDataItemList.end (); ++it) {
+ list <IDataItemObserver *> clientListSubs;
+ list <IDataItemObserver *> clientListOut;
+ this->mParent->mDataItemIndex->remove ((*it),
+ list <IDataItemObserver *> (1,this->mClient), clientListOut);
+ // check if there are any other subscribed client for this data item id
+ this->mParent->mDataItemIndex->getListOfSubscribedClients ( (*it), clientListSubs);
+ if (clientListSubs.empty())
+ {
+ LOC_LOGD ("Client list subscribed is empty for dataitem - %d",(*it));
+ unsubscribeList.push_back((*it));
+ }
+ }
+ if (!unsubscribeList.empty ()) {
+ // Send unsubscribe to framework
+ this->mParent->mContext.mSubscriptionObj->unsubscribe
+ (
+ unsubscribeList,
+ this->mParent
+ );
+ LOC_LOGD ("Unsubscribe Request sent to framework for the following data items");
+ this->mParent->logMe (unsubscribeList);
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: HandleUnsubscribeAllReq :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ list <IDataItemObserver *> clients (1, this->mClient);
+ list <DataItemId> unsubscribeList;
+ BREAK_IF_NON_ZERO (2, this->mParent->mClientIndex->remove (this->mClient));
+
+
+ this->mParent->mDataItemIndex->remove (clients, unsubscribeList);
+ if (!unsubscribeList.empty ()) {
+ // Send unsubscribe to framework
+ this->mParent->mContext.mSubscriptionObj->unsubscribe
+ (
+ unsubscribeList,
+ this->mParent
+ );
+ LOC_LOGD ("Unsubscribe Request sent to framework for the following data items");
+ this->mParent->logMe (unsubscribeList);
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: HandleNotify :: getListOfClients
+ (const list <DataItemId> & dlist, list <IDataItemObserver *> & clients ) const {
+
+ list <DataItemId> :: const_iterator it = dlist.begin ();
+ for (; it != dlist.end (); ++it) {
+ list <IDataItemObserver *> clientList;
+ this->mParent->mDataItemIndex->getListOfSubscribedClients ( (*it), clientList);
+ list <IDataItemObserver *> :: iterator citer = clientList.begin ();
+ for (; citer != clientList.end (); ++citer) {
+ clients.push_back (*citer);
+ }
+ clientList.clear ();
+ }
+ // remove duplicates
+ clients.unique ();
+}
+
+void SystemStatusOsObserver :: HandleNotify :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ // Update Cache with received data items and prepare
+ // list of data items to be sent.
+ list <IDataItemCore *> :: const_iterator it = mDList.begin ();
+ list <DataItemId> dataItemIdsToBeSent;
+ for (; it != mDList.end (); ++it) {
+ bool dataItemUpdated = false;
+ this->mParent->updateCache (*it, dataItemUpdated);
+ if (dataItemUpdated) {
+ dataItemIdsToBeSent.push_back ( (*it)->getId ());
+ }
+ }
+
+ list <IDataItemObserver *> clientList;
+ this->getListOfClients (dataItemIdsToBeSent, clientList);
+ list <IDataItemObserver *> :: iterator citer = clientList.begin ();
+ // Send data item to all subscribed clients
+ LOC_LOGD ("LocTech-Label :: SystemStatusOsObserver :: Data Items Out");
+ for (; citer != clientList.end (); ++citer) {
+ do {
+ list <DataItemId> dataItemIdsSubscribedByThisClient;
+ list <DataItemId> dataItemIdsToBeSentForThisClient;
+ this->mParent->mClientIndex->getSubscribedList (*citer, dataItemIdsSubscribedByThisClient);
+ dataItemIdsSubscribedByThisClient.sort ();
+ dataItemIdsToBeSent.sort ();
+ set_intersection (dataItemIdsToBeSent.begin (),
+ dataItemIdsToBeSent.end (),
+ dataItemIdsSubscribedByThisClient.begin (),
+ dataItemIdsSubscribedByThisClient.end (),
+ inserter (dataItemIdsToBeSentForThisClient,
+ dataItemIdsToBeSentForThisClient.begin ()));
+ BREAK_IF_NON_ZERO (4,this->mParent->sendCachedDataItems (dataItemIdsToBeSentForThisClient, *citer));
+ dataItemIdsSubscribedByThisClient.clear ();
+ dataItemIdsToBeSentForThisClient.clear ();
+ } while (0);
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+void SystemStatusOsObserver :: HandleTurnOn :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ // Send action turn on to framework
+ this->mParent->mContext.mFrameworkActionReqObj->turnOn(mDataItemId, mTimeOut);
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+void SystemStatusOsObserver :: HandleTurnOff :: proc () const {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ // Send action turn off to framework
+ this->mParent->mContext.mFrameworkActionReqObj->turnOff(mDataItemId);
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+/******************************************************************************
+ IDataItemSubscription Overrides
+******************************************************************************/
+void SystemStatusOsObserver :: subscribe (const list <DataItemId> & l, IDataItemObserver * client) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mSubscriptionObj != NULL) {
+ HandleSubscribeReq * msg = new (nothrow) HandleSubscribeReq (this, l, client);
+ mContext.mMsgTask->sendMsg (msg);
+ }
+ else {
+ LOC_LOGE("%s:%d]: Subscription object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: updateSubscription (const list <DataItemId> & l, IDataItemObserver * client) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mSubscriptionObj != NULL) {
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleUpdateSubscriptionReq (this, l, client));
+ }
+ else {
+ LOC_LOGE("%s:%d]: Subscription object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: requestData (const list <DataItemId> & l, IDataItemObserver * client) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mSubscriptionObj != NULL) {
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleRequestData (this, l, client));
+ }
+ else {
+ LOC_LOGE("%s:%d]: Subscription object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: unsubscribe (const list <DataItemId> & l, IDataItemObserver * client) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mSubscriptionObj != NULL) {
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleUnsubscribeReq (this, l, client));
+ }
+ else {
+ LOC_LOGE("%s:%d]: Subscription object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+void SystemStatusOsObserver :: unsubscribeAll (IDataItemObserver * client) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mSubscriptionObj != NULL) {
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleUnsubscribeAllReq (this, client));
+ }
+ else {
+ LOC_LOGE("%s:%d]: Subscription object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d",result);
+}
+
+/******************************************************************************
+ IDataItemObserver Overrides
+******************************************************************************/
+void SystemStatusOsObserver::getName(string & name) {
+ name = mAddress;
+}
+
+void SystemStatusOsObserver::notify(const std::list <IDataItemCore *> & dlist) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ list <IDataItemCore *> :: const_iterator it = dlist.begin ();
+ list <IDataItemCore *> dataItemList;
+ list <DataItemId> ids;
+ LOC_LOGD("LocTech-Label :: SystemStatusOsObserver :: Data Items In");
+ for (; it != dlist.end (); ++it) {
+ if (*it != NULL) {
+ string dv;
+ (*it)->stringify(dv);
+ LOC_LOGD("LocTech-Value :: Data Item Value: %s", dv.c_str ());
+ IDataItemCore * dataitem = DataItemsFactoryProxy::createNewDataItem((*it)->getId());
+ BREAK_IF_ZERO (2, dataitem);
+ // Copy contents into the newly created data item
+ dataitem->copy(*it);
+ dataItemList.push_back(dataitem);
+ ids.push_back((*it)->getId());
+ }
+ }
+ mContext.mMsgTask->sendMsg(new (nothrow) HandleNotify (this, dataItemList));
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+/******************************************************************************
+ IFrameworkActionReq Overrides
+******************************************************************************/
+void SystemStatusOsObserver :: turnOn (DataItemId dit, int timeOut) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mFrameworkActionReqObj != NULL) {
+ // Check if data item exists in mActiveRequestCount
+ map <DataItemId, int> :: iterator citer = mActiveRequestCount.find (dit);
+ if (citer == mActiveRequestCount.end ()) {
+ // Data item not found in map
+ // Add reference count as 1 and add dataitem to map
+ pair <DataItemId, int> cpair (dit, 1);
+ mActiveRequestCount.insert (cpair);
+ LOC_LOGD("Sending turnOn request");
+ // Send action turn on to framework
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleTurnOn (this, dit, timeOut));
+ } else {
+ // Found in map, update reference count
+ citer->second++;
+ LOC_LOGD("HandleTurnOn - Data item:%d Num_refs:%d",dit,citer->second);
+ }
+ }
+ else {
+ LOC_LOGE("%s:%d]: Framework action request object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+void SystemStatusOsObserver :: turnOff (DataItemId dit) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (mContext.mFrameworkActionReqObj != NULL) {
+ // Check if data item exists in mActiveRequestCount
+ map <DataItemId, int> :: iterator citer = mActiveRequestCount.find (dit);
+ if (citer != mActiveRequestCount.end ()) {
+ citer->second--;
+ LOC_LOGD("HandleTurnOff - Data item:%d Remaining Num_refs:%d",dit,citer->second);
+
+ if(citer->second == 0) {
+ LOC_LOGD("Sending turnOff request");
+ // if this was last reference, remove item from map and turn off module
+ mActiveRequestCount.erase(citer);
+ // Send action turn off to framework
+ mContext.mMsgTask->sendMsg (new (nothrow) HandleTurnOff (this, dit));
+ }
+ } else {
+ // Not found in map
+ LOC_LOGD ("Data item id %d not found in FrameworkModuleMap",dit);
+ }
+ }
+ else {
+ LOC_LOGE("%s:%d]: Framework action request object is NULL", __func__, __LINE__);
+ result = 1;
+ }
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+}
+
+/******************************************************************************
+ Helpers
+******************************************************************************/
+void SystemStatusOsObserver :: logMe (const list <DataItemId> & l) {
+ list <DataItemId> :: const_iterator it = l.begin ();
+ for (;it != l.end (); ++it) {
+ LOC_LOGD ("DataItem %d",*it);
+ }
+}
+
+int SystemStatusOsObserver :: sendFirstResponse (const list <DataItemId> & l, IDataItemObserver * to) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ if (l.empty ()) {
+ LOC_LOGV("list is empty. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+
+ string clientName;
+ to->getName (clientName);
+ LOC_LOGD ("First response sent for the following data items To Client: %s", clientName.c_str());
+
+ list <IDataItemCore *> dataItems;
+ list <DataItemId> :: const_iterator diditer = l.begin ();
+ for (; diditer != l.end (); ++diditer) {
+ map <DataItemId, IDataItemCore*> :: const_iterator citer = mDataItemCache.find (*diditer);
+ if (citer != mDataItemCache.end ()) {
+ string dv;
+ IDataItemCore * di = citer->second;
+ di->stringify (dv);
+ LOC_LOGD ("LocTech-Value :: Data Item: %s", dv.c_str ());
+ dataItems.push_back (citer->second);
+ }
+ }
+ if (dataItems.empty ()) {
+ LOC_LOGV("No items to notify. Nothing to do. Exiting");
+ result = 0;
+ break;
+ }
+
+ // Notify Client
+ to->notify (dataItems);
+
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+ return result;
+}
+
+int SystemStatusOsObserver :: sendCachedDataItems (const list <DataItemId> & l, IDataItemObserver * to) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ list <IDataItemCore *> dataItems;
+ list <DataItemId> :: const_iterator it = l.begin ();
+ string clientName;
+ to->getName (clientName);
+ LOC_LOGD ("LocTech-Value :: To Client: %s", clientName.c_str ());
+ for (; it != l.end (); ++it) {
+ string dv;
+ IDataItemCore * di = this->mDataItemCache [ (*it) ];
+ di->stringify (dv);
+ LOC_LOGI("LocTech-Value :: Data Item: %s >> %s", dv.c_str(), clientName.c_str());
+ dataItems.push_back (di);
+ }
+
+ to->notify (dataItems);
+
+ } while (0);
+ EXIT_LOG_WITH_ERROR ("%d", result);
+ return result;
+}
+
+int SystemStatusOsObserver :: updateCache (IDataItemCore * d, bool &dataItemUpdated) {
+ int result = 0;
+ ENTRY_LOG ();
+ do {
+ BREAK_IF_ZERO (1, d);
+ // Check if data item exists in cache
+ map <DataItemId, IDataItemCore*> :: iterator citer = mDataItemCache.find (d->getId ());
+ if (citer == mDataItemCache.end ()) {
+ // New data item; not found in cache
+ IDataItemCore * dataitem = DataItemsFactoryProxy::createNewDataItem(d->getId());
+ BREAK_IF_ZERO (2, dataitem);
+ // Copy the contents of the data item
+ dataitem->copy (d);
+ pair <DataItemId, IDataItemCore*> cpair (d->getId (), dataitem);
+ // Insert in mDataItemCache
+ mDataItemCache.insert (cpair);
+ dataItemUpdated = true;
+ } else {
+ // Found in cache; Update cache if necessary
+ BREAK_IF_NON_ZERO(3, citer->second->copy (d, &dataItemUpdated));
+ }
+
+ if (dataItemUpdated) {
+ LOC_LOGV("DataItem:%d updated:%d", d->getId (), dataItemUpdated);
+ }
+ } while (0);
+
+ EXIT_LOG_WITH_ERROR ("%d", result);
+ return result;
+}
+
+} // namespace loc_core
+