| /* |
| * Copyright (c) 2015, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 jdk.tools.jlink.internal.plugins; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.UncheckedIOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TreeSet; |
| import java.util.function.Predicate; |
| import java.util.stream.Collectors; |
| |
| import jdk.tools.jlink.internal.Platform; |
| import jdk.tools.jlink.plugin.Plugin; |
| import jdk.tools.jlink.plugin.ResourcePool; |
| import jdk.tools.jlink.plugin.ResourcePoolBuilder; |
| import jdk.tools.jlink.plugin.ResourcePoolModule; |
| import jdk.tools.jlink.plugin.ResourcePoolEntry; |
| import jdk.tools.jlink.plugin.PluginException; |
| |
| /** |
| * |
| * Exclude VM plugin |
| */ |
| public final class ExcludeVMPlugin implements Plugin { |
| |
| private static final class JvmComparator implements Comparator<Jvm> { |
| |
| @Override |
| public int compare(Jvm o1, Jvm o2) { |
| return o1.getEfficience() - o2.getEfficience(); |
| } |
| } |
| |
| private enum Jvm { |
| // The efficience order server - client - minimal. |
| SERVER("server", 3), CLIENT("client", 2), MINIMAL("minimal", 1); |
| private final String name; |
| private final int efficience; |
| |
| Jvm(String name, int efficience) { |
| this.name = name; |
| this.efficience = efficience; |
| } |
| |
| private String getName() { |
| return name; |
| } |
| |
| private int getEfficience() { |
| return efficience; |
| } |
| } |
| |
| private static final String JVM_CFG = "jvm.cfg"; |
| |
| public static final String NAME = "vm"; |
| private static final String ALL = "all"; |
| private static final String CLIENT = "client"; |
| private static final String SERVER = "server"; |
| private static final String MINIMAL = "minimal"; |
| |
| private Predicate<String> predicate; |
| private Jvm target; |
| private boolean keepAll; |
| |
| @Override |
| public String getName() { |
| return NAME; |
| } |
| |
| /** |
| * VM paths: |
| * /java.base/lib/{architecture}/{server|client|minimal}/{shared lib} |
| * e.g.: /java.base/lib/server/libjvm.so |
| * /java.base/lib/server/libjvm.dylib |
| */ |
| private List<ResourcePoolEntry> getVMs(ResourcePoolModule javaBase, String[] jvmlibs) { |
| List<ResourcePoolEntry> ret = javaBase.entries().filter((t) -> { |
| String path = t.path(); |
| for (String jvmlib : jvmlibs) { |
| if (t.path().endsWith("/" + jvmlib)) { |
| return true; |
| } |
| } |
| return false; |
| }).collect(Collectors.toList()); |
| return ret; |
| } |
| |
| @Override |
| public ResourcePool transform(ResourcePool in, ResourcePoolBuilder out) { |
| ResourcePoolModule javaBase = in.moduleView().findModule("java.base").get(); |
| String[] jvmlibs = jvmlibs(javaBase); |
| TreeSet<Jvm> existing = new TreeSet<>(new JvmComparator()); |
| TreeSet<Jvm> removed = new TreeSet<>(new JvmComparator()); |
| if (!keepAll) { |
| // First retrieve all available VM names and removed VM |
| List<ResourcePoolEntry> jvms = getVMs(javaBase, jvmlibs); |
| for (Jvm jvm : Jvm.values()) { |
| for (ResourcePoolEntry md : jvms) { |
| String mdPath = md.path(); |
| for (String jvmlib : jvmlibs) { |
| if (mdPath.endsWith("/" + jvm.getName() + "/" + jvmlib)) { |
| existing.add(jvm); |
| if (isRemoved(md)) { |
| removed.add(jvm); |
| } |
| } |
| } |
| } |
| } |
| } |
| // Check that target exists |
| if (!keepAll) { |
| if (!existing.contains(target)) { |
| throw new PluginException("Selected VM " + target.getName() + " doesn't exist."); |
| } |
| } |
| |
| // Rewrite the jvm.cfg file. |
| in.transformAndCopy((file) -> { |
| if (!keepAll) { |
| if (file.type().equals(ResourcePoolEntry.Type.NATIVE_LIB)) { |
| if (file.path().endsWith(JVM_CFG)) { |
| try { |
| file = handleJvmCfgFile(file, existing, removed); |
| } catch (IOException ex) { |
| throw new UncheckedIOException(ex); |
| } |
| } |
| } |
| file = isRemoved(file) ? null : file; |
| } |
| return file; |
| }, out); |
| |
| return out.build(); |
| } |
| |
| private boolean isRemoved(ResourcePoolEntry file) { |
| return !predicate.test(file.path()); |
| } |
| |
| @Override |
| public Category getType() { |
| return Category.FILTER; |
| } |
| |
| @Override |
| public String getDescription() { |
| return PluginsResourceBundle.getDescription(NAME); |
| } |
| |
| @Override |
| public boolean hasArguments() { |
| return true; |
| } |
| |
| @Override |
| public String getArgumentsDescription() { |
| return PluginsResourceBundle.getArgument(NAME); |
| } |
| |
| @Override |
| public void configure(Map<String, String> config) { |
| String value = config.get(NAME); |
| String exclude = ""; |
| switch (value) { |
| case ALL: { |
| // no filter. |
| keepAll = true; |
| break; |
| } |
| case CLIENT: { |
| target = Jvm.CLIENT; |
| exclude = "/java.base/lib**server/**,/java.base/lib**minimal/**"; |
| break; |
| } |
| case SERVER: { |
| target = Jvm.SERVER; |
| exclude = "/java.base/lib**client/**,/java.base/lib**minimal/**"; |
| break; |
| } |
| case MINIMAL: { |
| target = Jvm.MINIMAL; |
| exclude = "/java.base/lib**server/**,/java.base/lib**client/**"; |
| break; |
| } |
| default: { |
| throw new IllegalArgumentException("Unknown exclude VM option: " + value); |
| } |
| } |
| predicate = ResourceFilter.excludeFilter(exclude); |
| } |
| |
| private ResourcePoolEntry handleJvmCfgFile(ResourcePoolEntry orig, |
| TreeSet<Jvm> existing, |
| TreeSet<Jvm> removed) throws IOException { |
| if (keepAll) { |
| return orig; |
| } |
| StringBuilder builder = new StringBuilder(); |
| // Keep comments |
| try (BufferedReader reader |
| = new BufferedReader(new InputStreamReader(orig.content(), |
| StandardCharsets.UTF_8))) { |
| reader.lines().forEach((s) -> { |
| if (s.startsWith("#")) { |
| builder.append(s).append("\n"); |
| } |
| }); |
| } |
| TreeSet<Jvm> remaining = new TreeSet<>(new JvmComparator()); |
| // Add entry in jvm.cfg file from the more efficient to less efficient. |
| for (Jvm platform : existing) { |
| if (!removed.contains(platform)) { |
| remaining.add(platform); |
| builder.append("-").append(platform.getName()).append(" KNOWN\n"); |
| } |
| } |
| |
| // removed JVM are aliased to the most efficient remaining JVM (last one). |
| // The order in the file is from most to less efficient platform |
| for (Jvm platform : removed.descendingSet()) { |
| builder.append("-").append(platform.getName()). |
| append(" ALIASED_TO -"). |
| append(remaining.last().getName()).append("\n"); |
| } |
| |
| byte[] content = builder.toString().getBytes(StandardCharsets.UTF_8); |
| |
| return orig.copyWithContent(content); |
| } |
| |
| private static String[] jvmlibs(ResourcePoolModule module) { |
| Platform platform = Platform.getTargetPlatform(module); |
| switch (platform) { |
| case WINDOWS: |
| return new String[] { "jvm.dll" }; |
| case MACOS: |
| return new String[] { "libjvm.dylib", "libjvm.a" }; |
| default: |
| return new String[] { "libjvm.so", "libjvm.a" }; |
| } |
| } |
| } |