1/*
2 * Copyright (c) 2016, 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
24package test;
25
26import java.lang.module.Configuration;
27import java.lang.module.ModuleFinder;
28import java.lang.reflect.Method;
29import java.nio.file.Path;
30import java.nio.file.Paths;
31import java.util.*;
32import java.util.concurrent.Callable;
33import java.util.concurrent.ExecutorService;
34import java.util.concurrent.Executors;
35import java.util.concurrent.Future;
36
37public class Main {
38
39    private static final Path MODS_DIR = Paths.get(System.getProperty("jdk.module.path"));
40    static final String MODULE_NAME = "jdk.translet";
41
42    public static void main(String[] args) throws Exception {
43
44        ModuleFinder finder = ModuleFinder.of(MODS_DIR);
45        ModuleLayer layerBoot = ModuleLayer.boot();
46
47        Configuration cf = layerBoot
48                .configuration()
49                .resolve(ModuleFinder.of(), finder, Set.of(MODULE_NAME));
50
51        Module testModule = Main.class.getModule();
52        ClassLoader scl = ClassLoader.getSystemClassLoader();
53
54        // Create an unique module/class loader in a layer above the boot layer.
55        // Export this module to the jdk.test/test package.
56        Callable<Void> task = new Callable<Void>() {
57            @Override
58            public Void call() throws Exception {
59                ModuleLayer layer = ModuleLayer.boot().defineModulesWithOneLoader(cf, scl);
60                Module transletModule = layer.findModule(MODULE_NAME).get();
61                testModule.addExports("test", transletModule);
62                Class<?> c = layer.findLoader(MODULE_NAME).loadClass("translet.Main");
63                Method method = c.getDeclaredMethod("go");
64                method.invoke(null);
65                return null;
66            }
67        };
68
69        List<Future<Void>> results = new ArrayList<>();
70
71        // Repeatedly create the layer above stressing the exportation of
72        // package jdk.test/test to several different modules.
73        ExecutorService pool = Executors.newFixedThreadPool(Math.min(100, Runtime.getRuntime().availableProcessors()*10));
74        try {
75            for (int i = 0; i < 10000; i++) {
76                results.add(pool.submit(task));
77            }
78        } finally {
79            pool.shutdown();
80        }
81
82        int passed = 0;
83        int failed = 0;
84
85        // The failed state should be 0, the created modules in layers above the
86        // boot layer should be allowed access to the contents of the jdk.test/test
87        // package since that package was exported to the transletModule above.
88        for (Future<Void> result : results) {
89            try {
90                result.get();
91                passed++;
92            } catch (Throwable x) {
93                x.printStackTrace();
94                failed++;
95            }
96        }
97
98        System.out.println("passed: " + passed);
99        System.out.println("failed: " + failed);
100    }
101
102    public static void callback() { }
103}
104