// Create a Layer over the boot layer.
// Define modules within this layer to test access between
// publically defined classes within packages of those modules.
public void createLayerOnBoot() throws Throwable {
// Define module: m1
// Can read: java.base, m2
// Packages: p1
// Packages exported: p1 is exported unqualifiedly
ModuleDescriptor descriptor_m1 =
new ModuleDescriptor.Builder("m1")
.requires("java.base")
.requires("m2")
.exports("p1")
.build();
// Define module: m2
// Can read: java.base
// Packages: p2
// Packages exported: p2 is exported unqualifiedly
ModuleDescriptor descriptor_m2 =
new ModuleDescriptor.Builder("m2").requires("java.base").exports("p2").build();
// Set up a ModuleFinder containing all modules for this layer.
ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2);
// Resolves "m1"
Configuration cf =
Layer.boot().configuration().resolveRequires(finder, ModuleFinder.of(), Set.of("m1"));
// map each module to the same class loader for this test
Map<String, ClassLoader> map = new HashMap<>();
map.put("m1", MySameClassLoader.loader1);
map.put("m2", MySameClassLoader.loader1);
// Create Layer that contains m1 & m2
Layer layer = Layer.boot().defineModules(cf, map::get);
assertTrue(layer.findLoader("m1") == MySameClassLoader.loader1);
assertTrue(layer.findLoader("m2") == MySameClassLoader.loader1);
// now use the same loader to load class p1.c1
Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");
try {
p1_c1_class.newInstance();
} catch (IllegalAccessError e) {
throw new RuntimeException(
"Test Failed, an IAE should not be thrown since p2 is exported unqualifiedly.");
}
}
public static void main(String[] args) throws Exception {
final FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
final Path root = fs.getPath("/modules");
final List<String> names =
Files.walk(root)
.filter(p -> p.getNameCount() > 2)
.filter(p -> Layer.boot().findModule(p.getName(1).toString()).isPresent())
.map(p -> p.subpath(2, p.getNameCount()))
.map(p -> p.toString())
.filter(s -> s.endsWith(".class") && !s.endsWith("module-info.class"))
.collect(Collectors.toList());
Runnable r =
new Runnable() {
@Override
public void run() {
names.forEach(
name -> {
String cn = name.substring(0, name.length() - 6).replace('/', '.');
try {
Class.forName(cn, false, ClassLoader.getSystemClassLoader());
} catch (Exception ex) {
System.err.println(Thread.currentThread() + " " + ex.getClass());
}
});
}
};
Thread[] threads = new Thread[NTHREADS];
for (int i = 0; i < NTHREADS; i++) {
Thread thread = new Thread(r);
threads[i] = thread;
thread.start();
}
Thread.sleep(1);
for (int i = 0; i < NTHREADS; i++) {
Thread thread = threads[i];
if (thread.isAlive()) {
thread.interrupt();
break;
}
}
for (int i = 0; i < NTHREADS; i++) {
Thread thread = threads[i];
thread.join();
}
}
