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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* Copyright (c) 2017, 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.
*/
/**
* @test
* @library /test/lib
* @modules jdk.compiler
* @build jdk.test.lib.compiler.CompilerUtils
* @run testng NoInterferenceTest
* @summary Basic test of ServiceLoader that ensures there is no interference
* when there are two service interfaces of the same name in a layer
* or overridden in a child layer.
*/
import java.lang.module.Configuration;
import java.lang.module.ModuleFinder;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.ServiceLoader;
import java.util.Set;
import jdk.test.lib.compiler.CompilerUtils;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
public class NoInterferenceTest {
private static final String TEST_SRC = System.getProperty("test.src");
private static final Path SRC_DIR = Paths.get(TEST_SRC, "modules");
private static final Path MODS_DIR = Paths.get("mods");
private static final List<String> MODULES = Arrays.asList("s1", "p1", "s2", "p2");
@BeforeTest
void compile() throws Exception {
Files.createDirectory(MODS_DIR);
for (String name : MODULES) {
Path src = SRC_DIR.resolve(name);
Path output = Files.createDirectory(MODS_DIR.resolve(name));
assertTrue(CompilerUtils.compile(src, output, "-p", MODS_DIR.toString()));
}
}
@Test
public void test() throws Exception {
ModuleFinder empty = ModuleFinder.of();
ModuleFinder finder = ModuleFinder.of(MODS_DIR);
ModuleLayer bootLayer = ModuleLayer.boot();
Configuration cf0 = bootLayer.configuration();
Configuration cf1 = cf0.resolveAndBind(finder, empty, Set.of("s1", "s2"));
Configuration cf2 = cf1.resolveAndBind(finder, empty, Set.of("s1", "s2"));
// cf1 contains s1, p1, s2, p2
assertTrue(cf1.modules().size() == 4);
// cf1 contains s1, p1, s2, p2
assertTrue(cf2.modules().size() == 4);
ClassLoader scl = ClassLoader.getSystemClassLoader();
ModuleLayer layer1 = bootLayer.defineModulesWithManyLoaders(cf1, scl);
testLayer(layer1);
ModuleLayer layer2 = layer1.defineModulesWithManyLoaders(cf2, scl);
testLayer(layer2);
}
/**
* Tests that the layer contains s1, p1, s2, and p2.
*
* Tests loading instances of s1/p.S and s2/p.S.
*/
private void testLayer(ModuleLayer layer) throws Exception {
assertTrue(layer.modules().size() == 4);
Module s1 = layer.findModule("s1").get();
Module p1 = layer.findModule("p1").get();
Module s2 = layer.findModule("s2").get();
Module p2 = layer.findModule("p2").get();
// p1 reads s1
assertTrue(p1.canRead(s1));
assertFalse(p1.canRead(s2));
// p2 reads s2
assertTrue(p2.canRead(s2));
assertFalse(p2.canRead(s1));
// iterate over implementations of s1/p.S
{
ClassLoader loader = layer.findLoader("s1");
Class<?> service = loader.loadClass("p.S");
List<?> list = collectAll(ServiceLoader.load(service, loader));
assertTrue(list.size() == 1);
assertTrue(list.get(0).getClass().getModule() == p1);
list = collectAll(ServiceLoader.load(layer, service));
assertTrue(list.size() == 1);
assertTrue(list.get(0).getClass().getModule() == p1);
}
// iterate over implementations of s2/p.S
{
ClassLoader loader = layer.findLoader("s2");
Class<?> service = loader.loadClass("p.S");
List<?> list = collectAll(ServiceLoader.load(service, loader));
assertTrue(list.size() == 1);
assertTrue(list.get(0).getClass().getModule() == p2);
list = collectAll(ServiceLoader.load(layer, service));
assertTrue(list.size() == 1);
assertTrue(list.get(0).getClass().getModule() == p2);
}
}
private <E> List<E> collectAll(ServiceLoader<E> loader) {
List<E> list = new ArrayList<>();
Iterator<E> iterator = loader.iterator();
while (iterator.hasNext()) {
list.add(iterator.next());
}
return list;
}
}
|
