/* ****************************************************************************
*
* mongoUpdateContextAvailabilitySubscription -
*/
HttpStatusCode mongoUpdateContextAvailabilitySubscription
(
UpdateContextAvailabilitySubscriptionRequest* requestP,
UpdateContextAvailabilitySubscriptionResponse* responseP,
Format notifyFormat,
const std::string& tenant
)
{
bool reqSemTaken;
LM_T(LmtMongo, ("Update Context Subscription, notifyFormat: '%s'", formatToString(notifyFormat)));
reqSemTake(__FUNCTION__, "ngsi9 update subscription request", SemWriteOp, &reqSemTaken);
/* Look for document */
BSONObj sub;
std::string err;
OID id;
if (!safeGetSubId(requestP->subscriptionId, &id, &(responseP->errorCode)))
{
reqSemGive(__FUNCTION__, "ngsi9 update subscription request (mongo assertion exception)", reqSemTaken);
if (responseP->errorCode.code == SccContextElementNotFound)
{
std::string details = std::string("invalid OID format: '") + requestP->subscriptionId.get() + "'";
alarmMgr.badInput(clientIp, details);
}
else // SccReceiverInternalError
{
LM_E(("Runtime Error (exception getting OID: %s)", responseP->errorCode.details.c_str()));
}
return SccOk;
}
if (!collectionFindOne(getSubscribeContextAvailabilityCollectionName(tenant), BSON("_id" << id), &sub, &err))
{
reqSemGive(__FUNCTION__, "ngsi9 update subscription request (mongo db exception)", reqSemTaken);
responseP->errorCode.fill(SccReceiverInternalError, err);
return SccOk;
}
if (sub.isEmpty())
{
responseP->errorCode.fill(SccContextElementNotFound);
reqSemGive(__FUNCTION__, "ngsi9 update subscription request (no subscriptions found)", reqSemTaken);
return SccOk;
}
/* We start with an empty BSONObjBuilder and process requestP for all the fields that can
* be updated. I don't like too much this strategy (I would have preferred to start with
* a copy of the original document, then modify as neded, but this doesn't seem to be easy
* using the API provide by the Mongo C++ driver)
*
* FIXME: a better implementation strategy could be doing an findAndModify() query to do the
* update, so detecting if the document was not found, instead of using findOne() + update()
* with $set operation. One operations to MongoDb. vs two operations.
*/
BSONObjBuilder newSub;
/* Entities (mandatory) */
BSONArrayBuilder entities;
for (unsigned int ix = 0; ix < requestP->entityIdVector.size(); ++ix) {
EntityId* en = requestP->entityIdVector[ix];
if (en->type == "") {
entities.append(BSON(CASUB_ENTITY_ID << en->id <<
CASUB_ENTITY_ISPATTERN << en->isPattern));
}
else {
entities.append(BSON(CASUB_ENTITY_ID << en->id <<
CASUB_ENTITY_TYPE << en->type <<
CASUB_ENTITY_ISPATTERN << en->isPattern));
}
}
newSub.append(CASUB_ENTITIES, entities.arr());
/* Attributes (always taken into account) */
BSONArrayBuilder attrs;
for (unsigned int ix = 0; ix < requestP->attributeList.size(); ++ix) {
attrs.append(requestP->attributeList[ix]);
}
newSub.append(CASUB_ATTRS, attrs.arr());
/* Duration (optional) */
if (requestP->duration.isEmpty())
{
newSub.append(CASUB_EXPIRATION, getField(sub, CASUB_EXPIRATION).numberLong());
}
else {
long long expiration = getCurrentTime() + requestP->duration.parse();
newSub.append(CASUB_EXPIRATION, expiration);
LM_T(LmtMongo, ("New subscription expiration: %l", expiration));
}
/* Reference is not updatable, so it is appended directly */
newSub.append(CASUB_REFERENCE, getStringField(sub, CASUB_REFERENCE));
int count = sub.hasField(CASUB_COUNT) ? getIntField(sub, CASUB_COUNT) : 0;
/* The hasField check is needed due to lastNotification/count could not be present in the original doc */
if (sub.hasField(CASUB_LASTNOTIFICATION)) {
newSub.append(CASUB_LASTNOTIFICATION, getIntField(sub, CASUB_LASTNOTIFICATION));
}
if (sub.hasField(CASUB_COUNT)) {
newSub.append(CASUB_COUNT, count);
}
/* Adding format to use in notifications */
newSub.append(CASUB_FORMAT, std::string(formatToString(notifyFormat)));
/* Update document in MongoDB */
if (!collectionUpdate(getSubscribeContextAvailabilityCollectionName(tenant), BSON("_id" << OID(requestP->subscriptionId.get())), newSub.obj(), false, &err))
{
reqSemGive(__FUNCTION__, "ngsi9 update subscription request (mongo db exception)", reqSemTaken);
responseP->errorCode.fill(SccReceiverInternalError, err);
return SccOk;
}
/* Send notifications for matching context registrations */
processAvailabilitySubscription(requestP->entityIdVector, requestP->attributeList, requestP->subscriptionId.get(), getStringField(sub, CASUB_REFERENCE), notifyFormat, tenant);
/* Duration is an optional parameter, it is only added in the case they
* was used for update */
if (!requestP->duration.isEmpty())
{
responseP->duration = requestP->duration;
}
responseP->subscriptionId = requestP->subscriptionId;
reqSemGive(__FUNCTION__, "ngsi9 update subscription request", reqSemTaken);
return SccOk;
}
/* ****************************************************************************
*
* mongoUnsubscribeContextAvailability -
*/
HttpStatusCode mongoUnsubscribeContextAvailability
(
UnsubscribeContextAvailabilityRequest* requestP,
UnsubscribeContextAvailabilityResponse* responseP,
const std::string& tenant
)
{
bool reqSemTaken;
std::string err;
reqSemTake(__FUNCTION__, "ngsi9 unsubscribe request", SemWriteOp, &reqSemTaken);
LM_T(LmtMongo, ("Unsubscribe Context Availability"));
/* No matter if success or failure, the subscriptionId in the response is always the one
* in the request */
responseP->subscriptionId = requestP->subscriptionId;
/* Look for document */
BSONObj sub;
OID id;
if (!safeGetSubId(requestP->subscriptionId, &id, &(responseP->statusCode)))
{
reqSemGive(__FUNCTION__, "ngsi9 unsubscribe request (safeGetSubId fail)", reqSemTaken);
if (responseP->statusCode.code == SccContextElementNotFound)
{
// FIXME: doubt: invalid OID format? Or, subscription not found?
std::string details = std::string("invalid OID format: '") + requestP->subscriptionId.get() + "'";
alarmMgr.badInput(clientIp, details);
}
else // SccReceiverInternalError
{
LM_E(("Runtime Error (exception getting OID: %s)", responseP->statusCode.details.c_str()));
}
return SccOk;
}
if (!collectionFindOne(getSubscribeContextAvailabilityCollectionName(tenant), BSON("_id" << id), &sub, &err))
{
reqSemGive(__FUNCTION__, "ngsi9 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
alarmMgr.dbErrorReset();
if (sub.isEmpty())
{
responseP->statusCode.fill(SccContextElementNotFound);
reqSemGive(__FUNCTION__, "ngsi9 unsubscribe request (no subscriptions)", reqSemTaken);
return SccOk;
}
/* Remove document in MongoDB */
// FIXME: I would prefer to do the find and remove in a single operation. Is the some similar
// to findAndModify for this?
if (!collectionRemove(getSubscribeContextAvailabilityCollectionName(tenant), BSON("_id" << OID(requestP->subscriptionId.get())), &err))
{
reqSemGive(__FUNCTION__, "ngsi9 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
reqSemGive(__FUNCTION__, "ngsi9 unsubscribe request", reqSemTaken);
responseP->statusCode.fill(SccOk);
return SccOk;
}
/* ****************************************************************************
*
* mongoUnsubscribeContext -
*/
HttpStatusCode mongoUnsubscribeContext(UnsubscribeContextRequest* requestP, UnsubscribeContextResponse* responseP, const std::string& tenant)
{
bool reqSemTaken;
std::string err;
reqSemTake(__FUNCTION__, "ngsi10 unsubscribe request", SemWriteOp, &reqSemTaken);
LM_T(LmtMongo, ("Unsubscribe Context"));
/* No matter if success or failure, the subscriptionId in the response is always the one
* in the request */
responseP->subscriptionId = requestP->subscriptionId;
if (responseP->subscriptionId.get() == "")
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (no subscriptions found)", reqSemTaken);
responseP->statusCode.fill(SccContextElementNotFound);
alarmMgr.badInput(clientIp, "no subscriptionId");
return SccOk;
}
/* Look for document */
BSONObj sub;
OID id;
if (!safeGetSubId(requestP->subscriptionId, &id, &(responseP->statusCode)))
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (safeGetSubId fail)", reqSemTaken);
if (responseP->statusCode.code == SccContextElementNotFound)
{
// FIXME: Doubt - invalid OID format? Or, just a subscription that was not found?
std::string details = std::string("invalid OID format: '") + requestP->subscriptionId.get() + "'";
alarmMgr.badInput(clientIp, details);
}
else // SccReceiverInternalError
{
LM_E(("Runtime Error (exception getting OID: %s)", responseP->statusCode.details.c_str()));
}
return SccOk;
}
if (!collectionFindOne(getSubscribeContextCollectionName(tenant), BSON("_id" << id), &sub, &err))
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
if (sub.isEmpty())
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (no subscriptions found)", reqSemTaken);
responseP->statusCode.fill(SccContextElementNotFound, std::string("subscriptionId: /") + requestP->subscriptionId.get() + "/");
return SccOk;
}
/* Remove document in MongoDB */
// FIXME: I would prefer to do the find and remove in a single operation. Is there something similar
// to findAndModify for this?
if (!collectionRemove(getSubscribeContextCollectionName(tenant), BSON("_id" << OID(requestP->subscriptionId.get())), &err))
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
/* Destroy any previous ONTIMEINTERVAL thread */
getNotifier()->destroyOntimeIntervalThreads(requestP->subscriptionId.get());
//
// Removing subscription from mongo subscription cache
//
LM_T(LmtSubCache, ("removing subscription '%s' (tenant '%s') from mongo subscription cache", requestP->subscriptionId.get().c_str(), tenant.c_str()));
cacheSemTake(__FUNCTION__, "Removing subscription from cache");
CachedSubscription* cSubP = subCacheItemLookup(tenant.c_str(), requestP->subscriptionId.get().c_str());
if (cSubP != NULL)
{
subCacheItemRemove(cSubP);
}
cacheSemGive(__FUNCTION__, "Removing subscription from cache");
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request", reqSemTaken);
responseP->statusCode.fill(SccOk);
return SccOk;
}
/* ****************************************************************************
*
* mongoUnsubscribeContext -
*/
HttpStatusCode mongoUnsubscribeContext(UnsubscribeContextRequest* requestP, UnsubscribeContextResponse* responseP, const std::string& tenant)
{
bool reqSemTaken;
std::string err;
reqSemTake(__FUNCTION__, "ngsi10 unsubscribe request", SemWriteOp, &reqSemTaken);
LM_T(LmtMongo, ("Unsubscribe Context"));
/* No matter if success or failure, the subscriptionId in the response is always the one
* in the request */
responseP->subscriptionId = requestP->subscriptionId;
if (responseP->subscriptionId.get() == "")
{
responseP->statusCode.fill(SccContextElementNotFound);
LM_W(("Bad Input (no subscriptionId)"));
return SccOk;
}
/* Look for document */
BSONObj sub;
OID id;
try
{
id = OID(requestP->subscriptionId.get());
}
catch (const AssertionException &e)
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo assertion exception)", reqSemTaken);
//
// This happens when OID format is wrong
// FIXME: this checking should be done at parsing stage, without progressing to
// mongoBackend. For the moment we can live this here, but we should remove in the future
// (old issue #95)
//
responseP->statusCode.fill(SccContextElementNotFound);
LM_W(("Bad Input (invalid OID format)"));
return SccOk;
}
if (!collectionFindOne(getSubscribeContextCollectionName(tenant), BSON("_id" << id), &sub, &err))
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
if (sub.isEmpty())
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (no subscriptions found)", reqSemTaken);
responseP->statusCode.fill(SccContextElementNotFound, std::string("subscriptionId: /") + requestP->subscriptionId.get() + "/");
return SccOk;
}
/* Remove document in MongoDB */
// FIXME: I would prefer to do the find and remove in a single operation. Is there something similar
// to findAndModify for this?
if (!collectionRemove(getSubscribeContextCollectionName(tenant), BSON("_id" << OID(requestP->subscriptionId.get())), &err))
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError, err);
return SccOk;
}
/* Destroy any previous ONTIMEINTERVAL thread */
getNotifier()->destroyOntimeIntervalThreads(requestP->subscriptionId.get());
// FIXME P7: mongoSubCache stuff could be avoided if subscription is not patterned
//
// Removing subscription from mongo subscription cache
//
LM_T(LmtMongoSubCache, ("removing subscription '%s' (tenant '%s') from mongo subscription cache", requestP->subscriptionId.get().c_str(), tenant.c_str()));
cacheSemTake(__FUNCTION__, "Removing subscription from cache");
CachedSubscription* cSubP = mongoSubCacheItemLookup(tenant.c_str(), requestP->subscriptionId.get().c_str());
if (cSubP != NULL) // Will only enter here if wildcard subscription
{
mongoSubCacheItemRemove(cSubP);
}
cacheSemGive(__FUNCTION__, "Removing subscription from cache");
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request", reqSemTaken);
responseP->statusCode.fill(SccOk);
return SccOk;
}