| /* |
| * Copyright (c) 2014, 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. |
| */ |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.nio.file.Files; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.concurrent.TimeUnit; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarOutputStream; |
| import java.util.jar.Manifest; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.StandardJavaFileManager; |
| import javax.tools.ToolProvider; |
| |
| /** |
| * Utils class for compiling , creating jar file and executing a java command |
| * |
| * @author Raghu Nair |
| */ |
| |
| public class JavaToolUtils { |
| |
| public static final long DEFAULT_WAIT_TIME = 10000; |
| |
| private JavaToolUtils() { |
| } |
| |
| /** |
| * Takes a list of files and compile these files into the working directory. |
| * |
| * @param files |
| * @throws IOException |
| */ |
| public static void compileFiles(List<File> files) throws IOException { |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| try (StandardJavaFileManager fileManager = compiler. |
| getStandardFileManager(null, null, null)) { |
| Iterable<? extends JavaFileObject> compilationUnit |
| = fileManager.getJavaFileObjectsFromFiles(files); |
| compiler.getTask(null, fileManager, null, null, null, |
| compilationUnit).call(); |
| } |
| } |
| |
| /** |
| * Create a jar file using the list of files provided. |
| * |
| * @param jar |
| * @param files |
| * @throws IOException |
| */ |
| public static void createJar(File jar, List<File> files) |
| throws IOException { |
| Manifest manifest = new Manifest(); |
| manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, |
| "1.0"); |
| try (JarOutputStream target = new JarOutputStream( |
| new FileOutputStream(jar), manifest)) { |
| for (File file : files) { |
| add(file, target); |
| } |
| } |
| } |
| |
| private static void add(File source, JarOutputStream target) |
| throws IOException { |
| Objects.requireNonNull(source, "source cannot be null"); |
| Objects.requireNonNull(target, "target cannot be null"); |
| // not tested against directories and from different path. |
| String name = source.getName(); |
| if (source.isDirectory()) { |
| if (!name.isEmpty()) { |
| if (!name.endsWith("/")) { |
| name += "/"; |
| } |
| JarEntry entry = new JarEntry(name); |
| entry.setTime(source.lastModified()); |
| target.putNextEntry(entry); |
| target.closeEntry(); |
| } |
| for (File nestedFile : source.listFiles()) { |
| add(nestedFile, target); |
| } |
| return; |
| } |
| System.out.println("Adding entry " + name); |
| JarEntry entry = new JarEntry(name); |
| entry.setTime(source.lastModified()); |
| target.putNextEntry(entry); |
| Files.copy(source.toPath(), target); |
| target.closeEntry(); |
| } |
| |
| /** |
| * Runs java command with provided arguments. Caller should not pass java |
| * command in the argument list. |
| * |
| * @param commands |
| * @param waitTime time to wait for the command to exit in milli seconds |
| * @return |
| * @throws Exception |
| */ |
| public static int runJava(List<String> commands,long waitTime) |
| throws Exception { |
| String java = System.getProperty("java.home") + "/bin/java"; |
| commands.add(0, java); |
| String command = commands.toString().replace(",", " "); |
| System.out.println("Executing the following command \n" + command); |
| ProcessBuilder processBuilder = new ProcessBuilder(commands); |
| final Process process = processBuilder.start(); |
| BufferedReader errorStream = new BufferedReader( |
| new InputStreamReader(process.getErrorStream())); |
| BufferedReader outStream = new BufferedReader( |
| new InputStreamReader(process.getInputStream())); |
| String errorLine; |
| StringBuilder errors = new StringBuilder(); |
| String outLines; |
| while ((errorLine = errorStream.readLine()) != null) { |
| errors.append(errorLine).append("\n"); |
| } |
| while ((outLines = outStream.readLine()) != null) { |
| System.out.println(outLines); |
| } |
| errorLine = errors.toString(); |
| System.err.println(errorLine); |
| process.waitFor(waitTime, TimeUnit.MILLISECONDS); |
| int exitStatus = process.exitValue(); |
| if (exitStatus != 0 && errorLine != null && errorLine.isEmpty()) { |
| throw new RuntimeException(errorLine); |
| } |
| return exitStatus; |
| } |
| |
| /** |
| * Runs java command with provided arguments. Caller should not pass java |
| * command in the argument list. |
| * |
| * @param commands |
| * @return |
| * @throws Exception |
| */ |
| public static int runJava(List<String> commands) throws Exception { |
| return runJava(commands, DEFAULT_WAIT_TIME); |
| } |
| |
| /** |
| * Run any command |
| * @param commands |
| * @return |
| * @throws Exception |
| */ |
| public static int runCommand(List<String> commands) throws Exception { |
| String command = commands.toString().replace(",", " "); |
| System.out.println("Executing the following command \n" + command); |
| ProcessBuilder processBuilder = new ProcessBuilder(commands); |
| final Process process = processBuilder.start(); |
| BufferedReader errorStream = new BufferedReader( |
| new InputStreamReader(process.getErrorStream())); |
| BufferedReader outStream = new BufferedReader( |
| new InputStreamReader(process.getInputStream())); |
| String errorLine; |
| StringBuilder errors = new StringBuilder(); |
| String outLines; |
| while ((errorLine = errorStream.readLine()) != null) { |
| errors.append(errorLine).append("\n"); |
| } |
| while ((outLines = outStream.readLine()) != null) { |
| System.out.println(outLines); |
| } |
| errorLine = errors.toString(); |
| System.err.println(errorLine); |
| int exitStatus = process.exitValue(); |
| if (exitStatus != 0 && errorLine != null && errorLine.isEmpty()) { |
| throw new RuntimeException(errorLine); |
| } |
| return exitStatus; |
| } |
| |
| |
| } |