Examples with Lookup org.xbill.DNS.Lookup used on opensource projects

Example 11 with Lookup

use of org.xbill.DNS.Lookup in project ecf by eclipse.

the class DnsSdServiceTypeID method getInternalQueries.

Lookup[] getInternalQueries() {
    String[] protos = protocols;
    int type = Type.SRV;
    String service = null;
    if (services == null || services.length == 0 || (services.length == 1 && services[0].equals(""))) {
        // $NON-NLS-1$
        // if no service is set, create a non service specific query
        // $NON-NLS-1$
        service = "_services._dns-sd._";
        // and set proto to "udp" irregardless what has been set
        // $NON-NLS-1$
        protos = new String[] { "udp" };
        // and query for PTR records
        type = Type.PTR;
    } else {
        // $NON-NLS-1$
        service = "_";
        for (int i = 0; i < services.length; i++) {
            service += services[i];
            // $NON-NLS-1$
            service += "._";
        }
    }
    List result = new ArrayList();
    for (int i = 0; i < scopes.length; i++) {
        String scope = scopes[i];
        // remove dangling "."
        if (scope.endsWith(".")) {
            // $NON-NLS-1$
            scope = scope.substring(0, scope.length() - 1);
        }
        for (int j = 0; j < protos.length; j++) {
            Lookup query;
            try {
                query = new // $NON-NLS-1$ //$NON-NLS-2$
                Lookup(// $NON-NLS-1$ //$NON-NLS-2$
                service + protos[j] + "." + scope + ".", type);
            } catch (TextParseException e) {
                continue;
            }
            result.add(query);
        }
    }
    return (Lookup[]) result.toArray(new Lookup[result.size()]);
}

Example 12 with Lookup

use of org.xbill.DNS.Lookup in project cloudbreak by hortonworks.

the class DNSServiceAddressResolver method dnsSrvLookup.

private String dnsSrvLookup(String query) throws ServiceAddressResolvingException {
    String result;
    try {
        Record[] records = new Lookup(query, Type.SRV).run();
        if (records != null && records.length > 0) {
            SRVRecord srv = (SRVRecord) records[0];
            result = srv.getTarget().toString().replaceFirst("\\.$", "") + ':' + srv.getPort();
        } else {
            throw new ServiceAddressResolvingException("The Service " + query + " cannot be resolved");
        }
    } catch (TextParseException e) {
        throw new ServiceAddressResolvingException("The Service " + query + " cannot be resolved", e);
    }
    return result;
}

Example 13 with Lookup

use of org.xbill.DNS.Lookup in project PorkBot by DaMatrix.

the class Query method pingServer.

/**
 * Try pinging the server
 *
 * @return <code>true</code> if the server can be reached within 1.5 second
 */
public boolean pingServer() {
    // try pinging the given server
    String service = "_minecraft._tcp." + address.getHostName();
    try {
        Record[] records = new Lookup(service, Type.SRV).run();
        if (records != null)
            for (Record record : records) {
                SRVRecord srv = (SRVRecord) record;
                String hostname = srv.getTarget().toString();
                int port = srv.getPort();
                System.out.println(hostname + ":" + port);
                address = new InetSocketAddress(hostname, port);
                queryAddress = new InetSocketAddress(hostname, port);
            }
    } catch (TextParseException e1) {
        e1.printStackTrace();
    }
    try {
        final Socket socket = new Socket();
        socket.connect(address, 1500);
        socket.close();
        return true;
    } catch (IOException e) {
    }
    return false;
}

Example 14 with Lookup

use of org.xbill.DNS.Lookup in project fabric8 by fabric8io.

the class KubernetesHelper method lookupServiceEndpointsInDns.

/**
 * Looks up the service endpoints in DNS.
 * <p/>
 * Endpoints are registered as SRV records in DNS so this method returns
 * endpoints in the format "host:port". This is a list as SRV records are ordered
 * by priority & weight before being returned to the client.
 * <p/>
 * See https://github.com/GoogleCloudPlatform/kubernetes/blob/master/cluster/addons/dns/README.md
 */
public static List<String> lookupServiceEndpointsInDns(String serviceName) throws IllegalArgumentException, UnknownHostException {
    try {
        Lookup l = new Lookup(serviceName, Type.SRV);
        Record[] records = l.run();
        if (l.getResult() == Lookup.SUCCESSFUL) {
            SRVRecord[] srvRecords = Arrays.copyOf(records, records.length, SRVRecord[].class);
            Arrays.sort(srvRecords, new Comparator<SRVRecord>() {

                @Override
                public int compare(SRVRecord a, SRVRecord b) {
                    int ret = Integer.compare(b.getPriority(), a.getPriority());
                    if (ret == 0) {
                        ret = Integer.compare(b.getWeight(), a.getWeight());
                    }
                    return ret;
                }
            });
            List<String> endpointAddresses = new ArrayList<>(srvRecords.length);
            for (SRVRecord srvRecord : srvRecords) {
                endpointAddresses.add(srvRecord.getTarget().toString(true).concat(":").concat(String.valueOf(srvRecord.getPort())));
            }
            return endpointAddresses;
        } else {
            LOG.warn("Lookup {} result: {}", serviceName, l.getErrorString());
        }
    } catch (TextParseException e) {
        LOG.error("Unparseable service name: {}", serviceName, e);
    } catch (ClassCastException e) {
        LOG.error("Invalid response from DNS server - should have been A records", e);
    }
    return Collections.EMPTY_LIST;
}

Example 15 with Lookup

use of org.xbill.DNS.Lookup in project cloudbreak by hortonworks.

the class DNSServiceAddressResolver method dnsSrvLookup.

private String dnsSrvLookup(String query) throws ServiceAddressResolvingException {
    String result;
    try {
        Record[] records = new Lookup(query, Type.SRV).run();
        if (records != null && records.length > 0) {
            SRVRecord srv = (SRVRecord) records[0];
            result = srv.getTarget().toString().replaceFirst("\\.$", "") + ':' + srv.getPort();
        } else {
            throw new ServiceAddressResolvingException("The Service " + query + " cannot be resolved");
        }
    } catch (TextParseException e) {
        throw new ServiceAddressResolvingException("The Service " + query + " cannot be resolved", e);
    }
    return result;
}