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

Example 1 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class ProxyDNSStore method get.

/**
	 * {@inheritDoc}
	 */
@Override
public Message get(Message dnsMsg) throws DNSException {
    ExtendedResolver resolver = createExResolver(servers, port, 2, 2000);
    // try UPD first
    Message response = null;
    try {
        response = resolver.send(dnsMsg);
    } catch (IOException e) {
    /* no-op */
    }
    if (response == null) {
        // try TCP
        resolver.setTCP(true);
        try {
            response = resolver.send(dnsMsg);
        } catch (IOException e) {
        /* no-op */
        }
    }
    return response;
}

Example 2 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class ProxyDNSStore method createExResolver.

/*
	 * Create the resolver that will do the DNS requests.
	 */
private ExtendedResolver createExResolver(String[] servers, int port, int retries, int timeout) {
    ExtendedResolver retVal = null;
    try {
        retVal = new ExtendedResolver(servers);
        retVal.setRetries(retries);
        retVal.setTimeout(timeout);
    } catch (UnknownHostException e) {
        LOGGER.warn("Proxy store resolver could not be created: " + e.getMessage(), e);
    }
    return retVal;
}

Example 3 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class DNSConnectionTest method performLookup.

private static void performLookup() throws Exception {
    // turn on debug settings for the DNS client
    Options.set("verbose", "true");
    Cache ch = Lookup.getDefaultCache(DClass.IN);
    ch.clearCache();
    if (servers == null || servers.length == 0)
        servers = ResolverConfig.getCurrentConfig().servers();
    System.out.println("\r\nConfigure DNS resolvers:");
    for (String server : servers) {
        System.out.println("\t" + server);
    }
    System.out.println("\r\nLookup up record " + lookupRec);
    Lookup lu = new Lookup(new Name(lookupRec), recType);
    ExtendedResolver resolver = new ExtendedResolver(servers);
    resolver.setTCP(useTCP);
    lu.setResolver(resolver);
    Record[] retRecords = lu.run();
    if (retRecords != null && retRecords.length > 0)
        System.out.println(retRecords.length + " records found.");
    else
        System.out.println("No records found.");
}

Example 4 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class LdapPublicCertUtilImpl method createExResolver.

/**
	 * Creates the resolver used by the DNS lookup.
	 * @param servers Array or DNS servers 
	 * @param retries Number of times to retry the lookup if the case of failure
	 * @param timeout Timeout in seconds to wait for a response for a DNS query
	 * @return Configured DNS resolver object
	 */
protected ExtendedResolver createExResolver(String[] servers, int retries, int timeout) {
    ExtendedResolver retVal = null;
    try {
        retVal = new ExtendedResolver(servers);
        retVal.setRetries(retries);
        retVal.setTimeout(timeout);
        retVal.setTCP(false);
    } catch (UnknownHostException e) {
    /* no-op */
    }
    return retVal;
}

Example 5 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class DNSCertificateStore method createExResolver.

protected ExtendedResolver createExResolver(String[] servers, int retries, int timeout) {
    // create a default ExtendedResolver
    ExtendedResolver extendedResolver;
    try {
        extendedResolver = new ExtendedResolver();
    } catch (UnknownHostException e) {
        LOGGER.error("", e);
        throw new IllegalStateException("unable to create default ExtendedResolver", e);
    }
    // remove all resolvers from default ExtendedResolver
    Resolver[] resolvers = extendedResolver.getResolvers();
    if (!ArrayUtils.isEmpty(resolvers)) {
        for (Resolver resolver : resolvers) {
            extendedResolver.deleteResolver(resolver);
        }
    }
    // add the specified servers
    if (!ArrayUtils.isEmpty(servers)) {
        for (String server : servers) {
            // support for IP addresses instead of names
            server = server.replaceFirst("\\.$", "");
            try {
                // create and add a SimpleResolver for each server
                SimpleResolver simpleResolver = new SimpleResolver(server);
                extendedResolver.addResolver(simpleResolver);
            } catch (UnknownHostException e) {
                LOGGER.debug("unable to add resolver for " + server, e);
                continue;
            }
        }
        extendedResolver.setRetries(retries);
        extendedResolver.setTimeout(timeout);
        extendedResolver.setTCP(true);
    }
    return extendedResolver;
}