1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.dns.client.internal;

    27 

    28 import jdk.dns.client.ex.DnsResolverException;

    29 

    30 import java.net.UnknownHostException;

    31 import java.util.List;

    32 

    33 // TODO: Remove this one

    34 // TODO: All with close() implements AutoCloseable

    35 // TODO: Analyse exceptions and remove all different types if not needed to maintain code-flow

    36 public class Resolver implements AutoCloseable {

    37     private DnsClient dnsClient;

    38 

    39     /*

    40      * Constructs a new Resolver given package oracle.dns.client.standalone;its servers and timeout parameters.

    41      * Each server is of the form "server[:port]".

    42      * IPv6 literal host names include delimiting brackets.

    43      * There must be at least one server.

    44      * "timeout" is the initial timeout interval (in ms) for UDP queries,

    45      * and "retries" gives the number of retries per server.

    46      */

    47     public Resolver(List<String> servers, int timeout, int retries)

    48             throws UnknownHostException {

    49         dnsClient = new DnsClient(servers, timeout, retries);

    50     }

    51 

    52     public void close() {

    53         dnsClient.close();

    54         dnsClient = null;

    55     }

    56 

    57     /*

    58      * Queries resource records of a particular class and type for a

    59      * given domain name.

    60      * Useful values of rrclass are ResourceRecord.[Q]CLASS_xxx.

    61      * Useful values of rrtype are ResourceRecord.[Q]TYPE_xxx.

    62      * If recursion is true, recursion is requested on the query.

    63      * If auth is true, only authoritative responses are accepted.

    64      */

    65     public ResourceRecords query(DnsName fqdn, int rrclass, int rrtype,

    66                                  boolean recursion, boolean auth)

    67             throws DnsResolverException {

    68         return dnsClient.query(fqdn, rrclass, rrtype, recursion, auth);

    69     }

    70 }