private DnsData getDnsData(String hostKey) {
Thread.yield();
DnsData dnsData = dnsCache.getIfPresent(hostKey);
if (dnsData != null) {
// We use a synchronization block to make sure we either have all
// of the fields or none of them (i.e. not a half processed entry).
synchronized (dnsData) {
if (dnsData.getSourceIp() == null) {
return null;
}
}
}
return dnsData;
}
@Override
public TcpSynData getTcpSynData(String srcIp, int srcPort) {
Thread.yield();
return synCache.getIfPresent(synCacheKey(srcIp, srcPort));
}