| /** |
| * Copyright 2013 Florian Schmaus |
| * |
| * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.jivesoftware.smack.util.dns; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.xbill.DNS.Lookup; |
| import org.xbill.DNS.Record; |
| import org.xbill.DNS.Type; |
| |
| /** |
| * This implementation uses the <a href="http://www.dnsjava.org/">dnsjava</a> implementation for resolving DNS addresses. |
| * |
| */ |
| public class DNSJavaResolver implements DNSResolver { |
| |
| private static DNSJavaResolver instance = new DNSJavaResolver(); |
| |
| private DNSJavaResolver() { |
| |
| } |
| |
| public static DNSResolver getInstance() { |
| return instance; |
| } |
| |
| @Override |
| public List<SRVRecord> lookupSRVRecords(String name) { |
| List<SRVRecord> res = new ArrayList<SRVRecord>(); |
| |
| try { |
| Lookup lookup = new Lookup(name, Type.SRV); |
| Record recs[] = lookup.run(); |
| if (recs == null) |
| return res; |
| |
| for (Record record : recs) { |
| org.xbill.DNS.SRVRecord srvRecord = (org.xbill.DNS.SRVRecord) record; |
| if (srvRecord != null && srvRecord.getTarget() != null) { |
| String host = srvRecord.getTarget().toString(); |
| int port = srvRecord.getPort(); |
| int priority = srvRecord.getPriority(); |
| int weight = srvRecord.getWeight(); |
| |
| SRVRecord r; |
| try { |
| r = new SRVRecord(host, port, priority, weight); |
| } catch (Exception e) { |
| continue; |
| } |
| res.add(r); |
| } |
| } |
| |
| } catch (Exception e) { |
| } |
| return res; |
| } |
| } |