1 /*
 2  * Copyright (c) 2021, 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.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 import java.net.InetAddress;
25 import java.net.UnknownHostException;
26 import java.net.spi.InetAddressResolverProvider;
27 import java.net.spi.InetAddressResolver;
28 import java.net.spi.InetAddressResolver.LookupPolicy;
29 import java.util.ArrayList;
30 import java.util.Collections;
31 import java.util.List;
32 import java.util.logging.Logger;
33 import java.util.stream.Stream;
34 
35 import testlib.ResolutionRegistry;
36 
37 public class ClasspathResolverProviderImpl extends InetAddressResolverProvider {
38 
39     public static ResolutionRegistry registry = new ResolutionRegistry();
40     private static List<LookupPolicy> LOOKUP_HISTORY = Collections.synchronizedList(new ArrayList<>());
41     private static Logger LOGGER = Logger.getLogger(ClasspathResolverProviderImpl.class.getName());
42 
43     @Override
44     public InetAddressResolver get(Configuration configuration) {
45         System.out.println("The following provider will be used by current test:" + this.getClass().getCanonicalName());
46         return new InetAddressResolver() {
47             @Override
48             public Stream<InetAddress> lookupByName(String host, LookupPolicy lookupPolicy) throws UnknownHostException {
49                 LOGGER.info("Looking-up addresses for '" + host + "'. Lookup characteristics:" +
50                         Integer.toString(lookupPolicy.characteristics(), 2));
51                 LOOKUP_HISTORY.add(lookupPolicy);
52                 return registry.lookupHost(host, lookupPolicy);
53             }
54 
55             @Override
56             public String lookupByAddress(byte[] addr) throws UnknownHostException {
57                 LOGGER.info("Looking host name for the following address:" + ResolutionRegistry.addressBytesToString(addr));
58                 return registry.lookupAddress(addr);
59             }
60         };
61     }
62 
63     @Override
64     public String name() {
65         return "classpathINSP";
66     }
67 }