1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package impl;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.net.spi.InetAddressResolver;
import java.net.spi.InetAddressResolver.LookupPolicy;
import java.net.spi.InetAddressResolverProvider;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.logging.Logger;
import java.util.stream.Stream;
import testlib.ResolutionRegistry;
public class SimpleResolverProviderImpl extends InetAddressResolverProvider {
public static ResolutionRegistry registry = new ResolutionRegistry();
private static List<LookupPolicy> LOOKUP_HISTORY = Collections.synchronizedList(new ArrayList<>());
private static volatile long LAST_LOOKUP_TIMESTAMP;
private static volatile boolean unreachableServer;
private static volatile CountDownLatch blocker;
private static Logger LOGGER = Logger.getLogger(SimpleResolverProviderImpl.class.getName());
@Override
public InetAddressResolver get(Configuration configuration) {
System.out.println("The following provider will be used by current test:" + this.getClass().getCanonicalName());
return new InetAddressResolver() {
@Override
public Stream<InetAddress> lookupByName(String host, LookupPolicy lookupPolicy) throws UnknownHostException {
LOGGER.info("Looking-up addresses for '" + host + "'. Lookup characteristics:" +
Integer.toString(lookupPolicy.characteristics(), 2));
if (blocker != null) {
try {
blocker.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
LOOKUP_HISTORY.add(lookupPolicy);
LAST_LOOKUP_TIMESTAMP = System.nanoTime();
if (unreachableServer) {
throw new UnknownHostException("unreachableServer");
}
return registry.lookupHost(host, lookupPolicy);
}
@Override
public String lookupByAddress(byte[] addr) throws UnknownHostException {
LOGGER.info("Looking host name for the following address:" + ResolutionRegistry.addressBytesToString(addr));
if (unreachableServer) {
throw new UnknownHostException("unreachableServer");
}
return registry.lookupAddress(addr);
}
};
}
// Utility methods
public static LookupPolicy lastLookupPolicy() {
return lookupPolicyHistory(0);
}
public static long getLastLookupTimestamp() {
return LAST_LOOKUP_TIMESTAMP;
}
public static void setUnreachableServer(boolean unreachableServer) {
SimpleResolverProviderImpl.unreachableServer = unreachableServer;
}
public static void setBlocker(CountDownLatch blocker) {
SimpleResolverProviderImpl.blocker = blocker;
}
public static LookupPolicy lookupPolicyHistory(int position) {
if (LOOKUP_HISTORY.isEmpty()) {
throw new RuntimeException("No registered lookup policies");
}
if (position >= LOOKUP_HISTORY.size()) {
throw new IllegalArgumentException("No element available with provided position");
}
return LOOKUP_HISTORY.get(LOOKUP_HISTORY.size() - position - 1);
}
@Override
public String name() {
return "simpleInetAddressResolver";
}
}
|
