1 /*
2 * Copyright (c) 2017, 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 /**
25 * @test
26 * @modules jdk.zipfs
27 * @library /lib/testlibrary
28 * @build ModulesInCustomFileSystem JarUtils m1/* m2/*
29 * @run testng/othervm ModulesInCustomFileSystem
30 * @summary Test ModuleFinder to find modules in a custom file system
31 */
32
33 import java.io.File;
34 import java.lang.module.Configuration;
35 import java.lang.module.ModuleFinder;
36 import java.lang.module.ModuleReader;
37 import java.lang.module.ModuleReference;
38 import java.lang.reflect.Method;
39 import java.nio.file.FileSystem;
40 import java.nio.file.FileSystems;
41 import java.nio.file.Files;
42 import java.nio.file.Path;
43 import java.nio.file.Paths;
44 import java.util.Set;
45
46 import org.testng.annotations.Test;
47 import static org.testng.Assert.*;
48
49 @Test
50 public class ModulesInCustomFileSystem {
51 private static final Path HERE = Paths.get("");
52
53 /**
54 * Test exploded modules in a JAR file system.
55 */
56 public void testExplodedModulesInJarFileSystem() throws Exception {
57 Path m1 = findModuleDirectory("m1");
58 Path m2 = findModuleDirectory("m2");
59 Path mlib = m1.getParent();
60 assertEquals(mlib, m2.getParent());
61
62 // create JAR file containing m1/** and m2/**
63 Path jar = Files.createTempDirectory(HERE, "mlib").resolve("modules.jar");
64 JarUtils.createJarFile(jar, mlib);
65 testJarFileSystem(jar);
66 }
67
68 /**
69 * Test modular JARs in a JAR file system
70 */
71 public void testModularJARsInJarFileSystem() throws Exception {
72 Path m1 = findModuleDirectory("m1");
73 Path m2 = findModuleDirectory("m2");
74 Path contents = Files.createTempDirectory(HERE, "contents");
75 JarUtils.createJarFile(contents.resolve("m1.jar"), m1);
76 JarUtils.createJarFile(contents.resolve("m2.jar"), m2);
77
78 // create JAR file containing m1.jar and m2.jar
79 Path jar = Files.createTempDirectory(HERE, "mlib").resolve("modules.jar");
80 JarUtils.createJarFile(jar, contents);
81 testJarFileSystem(jar);
82 }
83
84 /**
85 * Opens a JAR file as a file system
86 */
87 private void testJarFileSystem(Path jar) throws Exception {
88 ClassLoader scl = ClassLoader.getSystemClassLoader();
89 try (FileSystem fs = FileSystems.newFileSystem(jar, scl)) {
90 // ModuleFinder to find modules in top-level directory
91 Path top = fs.getPath("/");
92 ModuleFinder finder = ModuleFinder.of(top);
93
94 // list the modules
95 listAllModules(finder);
96
97 // load modules into child layer, invoking m1/p.Main
98 loadAndRunModule(finder);
99 }
100 }
101
102 /**
103 * List all modules that the finder finds and the resources in the module.
104 */
105 private void listAllModules(ModuleFinder finder) throws Exception {
106 for (ModuleReference mref : finder.findAll()) {
107 System.out.println(mref.descriptor());
108 try (ModuleReader reader = mref.open()) {
109 reader.list().forEach(name -> System.out.format(" %s%n", name));
110 }
111 }
112 }
113
114 /**
115 * Creates a child layer with m1 and m2, invokes m1/p.Main to ensure that
116 * classes can be loaded.
117 */
118 private void loadAndRunModule(ModuleFinder finder) throws Exception {
119 ModuleLayer bootLayer = ModuleLayer.boot();
120 Configuration cf = bootLayer.configuration()
121 .resolve(finder, ModuleFinder.of(), Set.of("m1"));
122 ClassLoader scl = ClassLoader.getSystemClassLoader();
123 ModuleLayer layer = bootLayer.defineModulesWithOneLoader(cf, scl);
124 Class<?> c = layer.findLoader("m1").loadClass("p.Main");
125 Method m = c.getMethod("main", String[].class);
126 m.invoke(null, (Object)new String[0]);
127 }
128
129 /**
130 * Find the directory for a module on the module path
131 */
132 private Path findModuleDirectory(String name) {
133 String mp = System.getProperty("jdk.module.path");
134 for (String element : mp.split(File.pathSeparator)) {
135 Path dir = Paths.get(element).resolve(name);
136 if (Files.exists(dir)) {
137 return dir;
138 }
139 }
140 assertFalse(true);
141 return null;
142 }
143 }