Examples with DefaultDnsRawRecord io.netty.handler.codec.dns.DefaultDnsRawRecord used on opensource projects

Example 6 with DefaultDnsRawRecord

use of io.netty.handler.codec.dns.DefaultDnsRawRecord in project graylog2-server by Graylog2.

the class DnsClient method txtLookup.

public List<TxtDnsAnswer> txtLookup(String hostName) throws InterruptedException, ExecutionException {
    if (isShutdown()) {
        throw new DnsClientNotRunningException();
    }
    LOG.debug("Attempting to perform TXT lookup for hostname [{}]", hostName);
    validateHostName(hostName);
    DnsResponse content = null;
    try {
        content = resolver.query(new DefaultDnsQuestion(hostName, DnsRecordType.TXT)).get(requestTimeout, TimeUnit.MILLISECONDS).content();
        int count = content.count(DnsSection.ANSWER);
        final ArrayList<TxtDnsAnswer> txtRecords = new ArrayList<>(count);
        for (int i = 0; i < count; i++) {
            final DnsRecord dnsRecord = content.recordAt(DnsSection.ANSWER, i);
            LOG.trace("TXT record [{}] retrieved with content [{}].", i, dnsRecord);
            if (dnsRecord instanceof DefaultDnsRawRecord) {
                final DefaultDnsRawRecord txtRecord = (DefaultDnsRawRecord) dnsRecord;
                final TxtDnsAnswer.Builder dnsAnswerBuilder = TxtDnsAnswer.builder();
                final String decodeTxtRecord = decodeTxtRecord(txtRecord);
                LOG.trace("The decoded TXT record is [{}]", decodeTxtRecord);
                dnsAnswerBuilder.value(decodeTxtRecord).dnsTTL(txtRecord.timeToLive()).build();
                txtRecords.add(dnsAnswerBuilder.build());
            }
        }
        return txtRecords;
    } catch (TimeoutException e) {
        throw new ExecutionException("Resolver future didn't return a result in " + requestTimeout + " ms", e);
    } finally {
        if (content != null) {
            // Must manually release references on content object since the DnsResponse class extends ReferenceCounted
            content.release();
        }
    }
}