| /* |
| * Copyright (c) 2014, 2016, 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 container; |
| |
| import java.io.File; |
| import java.lang.module.Configuration; |
| import java.lang.module.ModuleFinder; |
| import java.lang.module.ResolvedModule; |
| import java.lang.reflect.Method; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.Set; |
| |
| /** |
| * Exercises dynamic configuration. |
| */ |
| |
| public class Main { |
| |
| public static void main(String[] args) throws Exception { |
| |
| System.out.println("Boot layer"); |
| ModuleLayer.boot() |
| .modules() |
| .stream() |
| .map(Module::getName) |
| .sorted() |
| .forEach(System.out::println); |
| |
| // "start" two applications in their own layers |
| start("applib", "app1", "app1.Main"); |
| start("applib", "app2", "app2.Main"); |
| } |
| |
| static void start(String appModulePath, |
| String appModuleName, |
| String appMainClass) throws Exception { |
| |
| System.out.format("Starting %s/%s ...%n", appModuleName, appMainClass); |
| |
| String[] dirs = appModulePath.split(File.pathSeparator); |
| Path[] paths = new Path[dirs.length]; |
| int i = 0; |
| for (String dir: dirs) { |
| paths[i++] = Paths.get(dir); |
| } |
| |
| ModuleFinder finder = ModuleFinder.of(paths); |
| |
| Configuration cf = ModuleLayer.boot().configuration() |
| .resolveAndBind(finder, |
| ModuleFinder.of(), |
| Set.of(appModuleName)); |
| |
| System.out.println("Resolved"); |
| cf.modules().stream() |
| .map(ResolvedModule::name) |
| .sorted() |
| .forEach(mn -> System.out.format(" %s%n", mn)); |
| |
| // reify the configuration as a module layer |
| ClassLoader scl = ClassLoader.getSystemClassLoader(); |
| ModuleLayer layer = ModuleLayer.boot().defineModulesWithManyLoaders(cf, scl); |
| |
| // invoke application main method |
| ClassLoader loader = layer.findLoader(appModuleName); |
| Class<?> c = loader.loadClass(appMainClass); |
| Main.class.getModule().addReads(c.getModule()); |
| Method mainMethod = c.getMethod("main", String[].class); |
| |
| // set TCCL as that is the EE thing to do |
| ClassLoader tccl = Thread.currentThread().getContextClassLoader(); |
| try { |
| Thread.currentThread().setContextClassLoader(loader); |
| mainMethod.invoke(null, (Object)new String[0]); |
| } finally { |
| Thread.currentThread().setContextClassLoader(tccl); |
| } |
| |
| System.out.println(); |
| } |
| } |