SubscriberPtr
Subscriber::create(
const InstancePtr& instance,
const SubscriberRecord& rec)
{
if(rec.link)
{
return new SubscriberLink(instance, rec);
}
else
{
PerSubscriberPublisherIPtr per = new PerSubscriberPublisherI(instance);
Ice::Identity perId;
perId.category = instance->instanceName();
perId.name = "topic." + rec.topicName + ".publish." +
instance->communicator()->identityToString(rec.obj->ice_getIdentity());
Ice::ObjectPrx proxy = instance->publishAdapter()->add(per, perId);
TraceLevelsPtr traceLevels = instance->traceLevels();
SubscriberPtr subscriber;
try
{
int retryCount = 0;
QoS::const_iterator p = rec.theQoS.find("retryCount");
if(p != rec.theQoS.end())
{
retryCount = atoi(p->second.c_str());
}
string reliability;
p = rec.theQoS.find("reliability");
if(p != rec.theQoS.end())
{
reliability = p->second;
}
if(!reliability.empty() && reliability != "ordered")
{
throw BadQoS("invalid reliability: " + reliability);
}
//
// Override the timeout.
//
Ice::ObjectPrx newObj;
try
{
newObj = rec.obj->ice_timeout(instance->sendTimeout());
}
catch(const Ice::FixedProxyException&)
{
//
// In the event IceStorm is collocated this could be a
// fixed proxy in which case its not possible to set the
// timeout.
//
newObj = rec.obj;
}
if(reliability == "ordered")
{
if(!newObj->ice_isTwoway())
{
throw BadQoS("ordered reliability requires a twoway proxy");
}
subscriber = new SubscriberTwoway(instance, rec, proxy, retryCount, 1, newObj);
}
else if(newObj->ice_isOneway() || newObj->ice_isDatagram())
{
if(retryCount > 0)
{
throw BadQoS("non-zero retryCount QoS requires a twoway proxy");
}
subscriber = new SubscriberOneway(instance, rec, proxy, retryCount, newObj);
}
else if(newObj->ice_isBatchOneway() || newObj->ice_isBatchDatagram())
{
if(retryCount > 0)
{
throw BadQoS("non-zero retryCount QoS requires a twoway proxy");
}
subscriber = new SubscriberBatch(instance, rec, proxy, retryCount, newObj);
}
else //if(newObj->ice_isTwoway())
{
assert(newObj->ice_isTwoway());
subscriber = new SubscriberTwoway(instance, rec, proxy, retryCount, 5, newObj);
}
per->setSubscriber(subscriber);
}
catch(const Ice::Exception&)
{
instance->publishAdapter()->remove(proxy->ice_getIdentity());
throw;
}
return subscriber;
}
}
void
TopicImpl::subscribe(const QoS& origQoS, const Ice::ObjectPrx& obj)
{
Ice::Identity id = obj->ice_getIdentity();
TraceLevelsPtr traceLevels = _instance->traceLevels();
QoS qos = origQoS;
if(traceLevels->topic > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->topicCat);
out << _name << ": subscribe: " << _instance->communicator()->identityToString(id);
if(traceLevels->topic > 1)
{
out << " endpoints: " << IceStormInternal::describeEndpoints(obj)
<< " QoS: ";
for(QoS::const_iterator p = qos.begin(); p != qos.end() ; ++p)
{
if(p != qos.begin())
{
out << ',';
}
out << '[' << p->first << "," << p->second << ']';
}
out << " subscriptions: ";
trace(out, _instance, _subscribers);
}
}
string reliability = "oneway";
{
QoS::iterator p = qos.find("reliability");
if(p != qos.end())
{
reliability = p->second;
qos.erase(p);
}
}
Ice::ObjectPrx newObj = obj;
if(reliability == "batch")
{
if(newObj->ice_isDatagram())
{
newObj = newObj->ice_batchDatagram();
}
else
{
newObj = newObj->ice_batchOneway();
}
}
else if(reliability == "twoway")
{
newObj = newObj->ice_twoway();
}
else if(reliability == "twoway ordered")
{
qos["reliability"] = "ordered";
newObj = newObj->ice_twoway();
}
else // reliability == "oneway"
{
if(reliability != "oneway" && traceLevels->subscriber > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->subscriberCat);
out << reliability <<" mode not understood.";
}
if(!newObj->ice_isDatagram())
{
newObj = newObj->ice_oneway();
}
}
IceUtil::Mutex::Lock sync(_subscribersMutex);
SubscriberRecord record;
record.id = id;
record.obj = newObj;
record.theQoS = qos;
record.topicName = _name;
record.link = false;
record.cost = 0;
LogUpdate llu;
vector<SubscriberPtr>::iterator p = find(_subscribers.begin(), _subscribers.end(), record.id);
if(p != _subscribers.end())
{
// If we already have this subscriber remove it from our
// subscriber list and remove it from the database.
(*p)->destroy();
_subscribers.erase(p);
for(;;)
{
try
{
DatabaseConnectionPtr connection = _connectionPool->newConnection();
TransactionHolder txn(connection);
SubscriberRecordKey key;
key.topic = _id;
key.id = record.id;
SubscribersWrapperPtr subscribersWrapper = _connectionPool->getSubscribers(connection);
subscribersWrapper->erase(key);
LLUWrapperPtr lluWrapper = _connectionPool->getLLU(connection);
llu = lluWrapper->get();
llu.iteration++;
lluWrapper->put(llu);
txn.commit();
break;
}
catch(const DeadlockException&)
{
continue;
}
catch(const DatabaseException& ex)
{
halt(_instance->communicator(), ex);
}
}
Ice::IdentitySeq ids;
ids.push_back(id);
_instance->observers()->removeSubscriber(llu, _name, ids);
}
SubscriberPtr subscriber = Subscriber::create(_instance, record);
for(;;)
{
try
{
DatabaseConnectionPtr connection = _connectionPool->newConnection();
TransactionHolder txn(connection);
SubscriberRecordKey key;
key.topic = _id;
key.id = subscriber->id();
SubscribersWrapperPtr subscribersWrapper = _connectionPool->getSubscribers(connection);
subscribersWrapper->put(key, record);
// Update the LLU.
LLUWrapperPtr lluWrapper = _connectionPool->getLLU(connection);
llu = lluWrapper->get();
llu.iteration++;
lluWrapper->put(llu);
txn.commit();
break;
}
catch(const DeadlockException&)
{
continue;
}
catch(const DatabaseException& ex)
{
halt(_instance->communicator(), ex);
}
}
_subscribers.push_back(subscriber);
_instance->observers()->addSubscriber(llu, _name, record);
}
void
TransientTopicImpl::subscribe(const QoS& origQoS, const Ice::ObjectPrx& obj, const Ice::Current&)
{
if(!obj)
{
TraceLevelsPtr traceLevels = _instance->traceLevels();
if(traceLevels->topic > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->topicCat);
out << _name << ": subscribe: null proxy";
}
throw InvalidSubscriber("subscriber is a null proxy");
}
Ice::Identity id = obj->ice_getIdentity();
TraceLevelsPtr traceLevels = _instance->traceLevels();
QoS qos = origQoS;
if(traceLevels->topic > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->topicCat);
out << _name << ": subscribe: " << _instance->communicator()->identityToString(id);
if(traceLevels->topic > 1)
{
out << " endpoints: " << IceStormInternal::describeEndpoints(obj)
<< " QoS: ";
for(QoS::const_iterator p = qos.begin(); p != qos.end() ; ++p)
{
if(p != qos.begin())
{
out << ',';
}
out << '[' << p->first << "," << p->second << ']';
}
}
}
string reliability = "oneway";
{
QoS::iterator p = qos.find("reliability");
if(p != qos.end())
{
reliability = p->second;
qos.erase(p);
}
}
Ice::ObjectPrx newObj = obj;
if(reliability == "batch")
{
if(newObj->ice_isDatagram())
{
newObj = newObj->ice_batchDatagram();
}
else
{
newObj = newObj->ice_batchOneway();
}
}
else if(reliability == "twoway")
{
newObj = newObj->ice_twoway();
}
else if(reliability == "twoway ordered")
{
qos["reliability"] = "ordered";
newObj = newObj->ice_twoway();
}
else // reliability == "oneway"
{
if(reliability != "oneway" && traceLevels->subscriber > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->subscriberCat);
out << reliability <<" mode not understood.";
}
if(!newObj->ice_isDatagram())
{
newObj = newObj->ice_oneway();
}
}
Lock sync(*this);
SubscriberRecord record;
record.id = id;
record.obj = newObj;
record.theQoS = qos;
record.topicName = _name;
record.link = false;
record.cost = 0;
vector<SubscriberPtr>::iterator p = find(_subscribers.begin(), _subscribers.end(), record.id);
if(p != _subscribers.end())
{
// If we already have this subscriber remove it from our
// subscriber list and remove it from the database.
(*p)->destroy();
_subscribers.erase(p);
}
SubscriberPtr subscriber = Subscriber::create(_instance, record);
_subscribers.push_back(subscriber);
}