void
TopicImpl::update(const SubscriberRecordSeq& records)
{
IceUtil::Mutex::Lock sync(_subscribersMutex);
// We do this with two scans. The first runs through the subscribers
// that we have and removes those not in the init list. The second
// runs through the init list and add the ones that don't
// exist.
{
vector<SubscriberPtr>::iterator p = _subscribers.begin();
while(p != _subscribers.end())
{
SubscriberRecordSeq::const_iterator q;
for(q = records.begin(); q != records.end(); ++q)
{
if((*p)->id() == q->id)
{
break;
}
}
// The subscriber doesn't exist in the incoming subscriber
// set so destroy it.
if(q == records.end())
{
(*p)->destroy();
p = _subscribers.erase(p);
}
else
{
// Otherwise reset the reaped status if necessary.
(*p)->resetIfReaped();
++p;
}
}
}
for(SubscriberRecordSeq::const_iterator p = records.begin(); p != records.end(); ++p)
{
vector<SubscriberPtr>::iterator q;
for(q = _subscribers.begin(); q != _subscribers.end(); ++q)
{
if((*q)->id() == p->id)
{
break;
}
}
if(q == _subscribers.end())
{
SubscriberPtr subscriber = Subscriber::create(_instance, *p);
_subscribers.push_back(subscriber);
}
}
}
TopicImpl::TopicImpl(
const InstancePtr& instance,
const string& name,
const Ice::Identity& id,
const SubscriberRecordSeq& subscribers) :
_instance(instance),
_name(name),
_id(id),
_connectionPool(instance->connectionPool()),
_destroyed(false)
{
try
{
__setNoDelete(true);
// TODO: If we want to improve the performance of the
// non-replicated case we could allocate a null-topic impl here.
_servant = new TopicI(this, instance);
//
// Create a servant per topic to receive event data. If the
// category is empty then we are in backwards compatibility
// mode. In this case the servant's identity is
// category=<topicname>, name=publish, otherwise the name is
// <instancename>/<topicname>.publish. The same applies to the
// link proxy.
//
// Activate the object and save a reference to give to publishers.
//
Ice::Identity pubid;
Ice::Identity linkid;
if(id.category.empty())
{
pubid.category = _name;
pubid.name = "publish";
linkid.category = _name;
linkid.name = "link";
}
else
{
pubid.category = id.category;
pubid.name = _name + ".publish";
linkid.category = id.category;
linkid.name = _name + ".link";
}
_publisherPrx = _instance->publishAdapter()->add(new PublisherI(this, instance), pubid);
_linkPrx = TopicLinkPrx::uncheckedCast(
_instance->publishAdapter()->add(new TopicLinkI(this, instance), linkid));
//
// Re-establish subscribers.
//
for(SubscriberRecordSeq::const_iterator p = subscribers.begin(); p != subscribers.end(); ++p)
{
Ice::Identity id = p->obj->ice_getIdentity();
TraceLevelsPtr traceLevels = _instance->traceLevels();
if(traceLevels->topic > 0)
{
Ice::Trace out(traceLevels->logger, traceLevels->topicCat);
out << _name << " recreate " << _instance->communicator()->identityToString(id);
if(traceLevels->topic > 1)
{
out << " endpoints: " << IceStormInternal::describeEndpoints(p->obj);
}
}
try
{
//
// Create the subscriber object add it to the set of
// subscribers.
//
SubscriberPtr subscriber = Subscriber::create(_instance, *p);
_subscribers.push_back(subscriber);
}
catch(const Ice::Exception& ex)
{
Ice::Warning out(traceLevels->logger);
out << _name << " recreate " << _instance->communicator()->identityToString(id);
if(traceLevels->topic > 1)
{
out << " endpoints: " << IceStormInternal::describeEndpoints(p->obj);
}
out << " failed: " << ex;
}
}
if(_instance->observer())
{
_observer.attach(_instance->observer()->getTopicObserver(_instance->serviceName(), _name, 0));
}
}
catch(...)
{
shutdown();
__setNoDelete(false);
throw;
}
__setNoDelete(false);
}
TopicManagerImpl::TopicManagerImpl(const InstancePtr& instance) :
_instance(instance),
_connectionPool(instance->connectionPool())
{
try
{
__setNoDelete(true);
if(_instance->observer())
{
_instance->observer()->setObserverUpdater(this);
}
// TODO: If we want to improve the performance of the
// non-replicated case we could allocate a null-topic manager impl
// here.
_managerImpl = new TopicManagerI(instance, this);
Ice::PropertiesPtr properties = _instance->communicator()->getProperties();
// If there is no node adapter we don't need to start the
// observer, nor sync since we're not replicating.
if(_instance->nodeAdapter())
{
_observerImpl = new ReplicaObserverI(instance, this);
_observer = _instance->nodeAdapter()->addWithUUID(_observerImpl);
_syncImpl = new TopicManagerSyncI(this);
_sync = _instance->nodeAdapter()->addWithUUID(_syncImpl);
}
DatabaseConnectionPtr connection = _connectionPool->newConnection();
// Ensure that the llu counter is present in the log.
LLUWrapperPtr lluWrapper = _connectionPool->getLLU(connection);
LogUpdate empty = {0, 0};
lluWrapper->put(empty);
// Recreate each of the topics.
SubscribersWrapperPtr subscribersWrapper = _connectionPool->getSubscribers(connection);
map<SubscriberRecordKey, SubscriberRecord> subscriberMap = subscribersWrapper->getMap();
map<SubscriberRecordKey, SubscriberRecord>::const_iterator p = subscriberMap.begin();
while(p != subscriberMap.end())
{
// This record has to be a place holder record, otherwise
// there is a database bug.
assert(p->first.id.name.empty() && p->first.id.category.empty());
Ice::Identity topic = p->first.topic;
// Skip the place holder.
++p;
SubscriberRecordSeq content;
while(p != subscriberMap.end() && p->first.topic == topic)
{
content.push_back(p->second);
++p;
}
string name = identityToTopicName(topic);
installTopic(name, topic, false, content);
}
}
catch(...)
{
shutdown();
__setNoDelete(false);
throw;
}
__setNoDelete(false);
}
TopicManagerImpl::TopicManagerImpl(const PersistentInstancePtr& instance) :
_instance(instance),
_lluMap(instance->lluMap()),
_subscriberMap(instance->subscriberMap())
{
try
{
__setNoDelete(true);
if(_instance->observer())
{
_instance->observer()->setObserverUpdater(this);
}
// TODO: If we want to improve the performance of the
// non-replicated case we could allocate a null-topic manager impl
// here.
_managerImpl = new TopicManagerI(instance, this);
// If there is no node adapter we don't need to start the
// observer, nor sync since we're not replicating.
if(_instance->nodeAdapter())
{
_observerImpl = new ReplicaObserverI(instance, this);
_observer = _instance->nodeAdapter()->addWithUUID(_observerImpl);
_syncImpl = new TopicManagerSyncI(this);
_sync = _instance->nodeAdapter()->addWithUUID(_syncImpl);
}
{
IceDB::ReadWriteTxn txn(_instance->dbEnv());
// Ensure that the llu counter is present in the log.
LogUpdate empty = {0, 0};
_instance->lluMap().put(txn, lluDbKey, empty);
// Recreate each of the topics.
SubscriberRecordKey k;
SubscriberRecord v;
SubscriberMapRWCursor cursor(_subscriberMap, txn);
if(cursor.get(k, v, MDB_FIRST))
{
bool moreTopics = false;
do
{
// This record has to be a place holder record, otherwise
// there is a database bug.
assert(k.id.name.empty() && k.id.category.empty());
Ice::Identity topic = k.topic;
bool moreTopics;
SubscriberRecordSeq content;
while((moreTopics = cursor.get(k, v, MDB_NEXT)) && k.topic == topic)
{
content.push_back(v);
}
string name = identityToTopicName(topic);
installTopic(name, topic, false, content);
} while(moreTopics);
}
txn.commit();
}
}
catch(...)
{
shutdown();
__setNoDelete(false);
throw;
}
__setNoDelete(false);
}
