void DCAwarePolicy::on_remove(const SharedRefPtr<Host>& host) {
const std::string& dc = host->dc();
if (dc == local_dc_) {
remove_host(local_dc_live_hosts_, host);
} else {
per_remote_dc_live_hosts_.remove_host_from_dc(host->dc(), host);
}
}
void DCAwarePolicy::init(const SharedRefPtr<Host>& connected_host, const HostMap& hosts) {
if (local_dc_.empty() && !connected_host->dc().empty()) {
LOG_INFO("Using '%s' for the local data center "
"(if this is incorrect, please provide the correct data center)",
connected_host->dc().c_str());
local_dc_ = connected_host->dc();
}
for (HostMap::const_iterator i = hosts.begin(),
end = hosts.end(); i != end; ++i) {
on_add(i->second);
}
}
void DCAwarePolicy::on_add(const SharedRefPtr<Host>& host) {
const std::string& dc = host->dc();
if (local_dc_.empty() && !dc.empty()) {
LOG_INFO("Using '%s' for local data center "
"(if this is incorrect, please provide the correct data center)",
host->dc().c_str());
local_dc_ = dc;
}
if (dc == local_dc_) {
local_dc_live_hosts_->push_back(host);
} else {
per_remote_dc_live_hosts_.add_host_to_dc(dc, host);
}
}
CassHostDistance DCAwarePolicy::distance(const SharedRefPtr<Host>& host) const {
if (local_dc_.empty() || host->dc() == local_dc_) {
return CASS_HOST_DISTANCE_LOCAL;
}
const CopyOnWriteHostVec& hosts = per_remote_dc_live_hosts_.get_hosts(host->dc());
size_t num_hosts = std::min(hosts->size(), used_hosts_per_remote_dc_);
for (size_t i = 0; i < num_hosts; ++i) {
if ((*hosts)[i]->address() == host->address()) {
return CASS_HOST_DISTANCE_REMOTE;
}
}
return CASS_HOST_DISTANCE_IGNORE;
}
bool BlacklistDCPolicy::is_valid_host(const SharedRefPtr<Host>& host) const {
const std::string& host_dc = host->dc();
for (DcList::const_iterator it = dcs_.begin(),
end = dcs_.end(); it != end; ++it) {
if (host_dc.compare(*it) == 0) {
return false;
}
}
return true;
}