const Callback& callback)

: callback_(callback)

, is_canceled_(false)

, remaining_(0)

, protocol_version_(protocol_version)

, listener_(NULL)

, metrics_(NULL)

inc_ref();

loop_ = loop;

remaining_ = hosts.size();

for (HostMap::const_iterator it = hosts.begin(), end = hosts.end(); it != end; ++it) {

ConnectionPoolConnector::Ptr pool_connector(new ConnectionPoolConnector(

it->second, protocol_version_,

bind_callback(&ConnectionPoolManagerInitializer::on_connect, this)));

pending_pools_.push_back(pool_connector);

pool_connector->with_listener(this)

->with_keyspace(keyspace_)

->with_metrics(metrics_)

->with_settings(settings_)

->with_shard_port_calculator(shard_port_calculator_)

->connect_with_scout(loop);

}

is_canceled_ = true;

if (manager_) {

manager_->close();

} else {

for (ConnectionPoolConnector::Vec::const_iterator it = pending_pools_.begin(),

end = pending_pools_.end();

it != end; ++it) {

(*it)->cancel();

}

for (ConnectionPool::Map::iterator it = pools_.begin(), end = pools_.end(); it != end; ++it) {

it->second->close();

}

}

if (listener_) {

listener_->on_pool_up(address);

}

if (listener_) {

listener_->on_pool_down(address);

}

Connector::ConnectionError code,

const String& message) {

if (listener_) {

listener_->on_pool_critical_error(address, code, message);

}

pending_pools_.erase(std::remove(pending_pools_.begin(), pending_pools_.end(), pool_connector),

pending_pools_.end());

if (!is_canceled_) {

if (pool_connector->is_ok()) {

ConnectionPool::Ptr pool = pool_connector->release_pool();

pools_[pool->address()] = pool;

} else {

failures_.push_back(ConnectionPoolConnector::Ptr(pool_connector));

}

}

if (--remaining_ == 0) {

if (!is_canceled_) {

manager_.reset(new ConnectionPoolManager(pools_, loop_, protocol_version_, keyspace_,

listener_, metrics_, settings_, shard_port_calculator_));

}

callback_(this);

// If the manager hasn't been released then close it.

if (manager_) {

// If the callback doesn't take possession of the manager then we should

// also clear the listener.

manager_->set_listener();

manager_->close();

}

dec_ref();

}