| /* |
| * Copyright (c) 2015, 2018, 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 metaspace.stressHierarchy.common; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * This class is compiled and invoke due the build to produce |
| * HumongousClass.java. The size of generated file is |
| * too large to store it in the repository. |
| */ |
| |
| public class HumongousClassGen { |
| |
| private static final String CLASS_NAME = "HumongousClass"; |
| private static final String PKG_NAME = "metaspace.stressHierarchy.common"; |
| private static final String PKG_DIR_NAME = PKG_NAME.replace(".", |
| File.separator); |
| private static final int ITERATIONS = 65300; |
| private static final double MG = (Math.pow(1024, 2)); |
| private static final int RECORD_COUNT = ITERATIONS + 10; |
| |
| public static void addFileHeader(List<String> records) { |
| records.add("package " + PKG_NAME + ";\n"); |
| records.add("\n"); |
| records.add("public class " + CLASS_NAME + " {\n"); |
| records.add("\n"); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (args.length < 1) { |
| System.out.println("Usage: HumongousClassGen " |
| + "<vm-testbase_src_folder>"); |
| throw new RuntimeException("Can't generate " + PKG_NAME + "." + CLASS_NAME); |
| } |
| |
| List<String> records = new ArrayList<String>(RECORD_COUNT); |
| addFileHeader(records); |
| for (int i = 1; i <= ITERATIONS; i++) { |
| records.add("public long long" + i + ";\n"); |
| } |
| records.add("}"); |
| writeBuffered(records, (int) (MG * 1), args[0]); |
| } |
| |
| private static void writeBuffered(List<String> records, int bufSize, |
| String srcDir) throws IOException { |
| String path = srcDir + File.separator + PKG_DIR_NAME + File.separator |
| + CLASS_NAME + ".java"; |
| System.out.println("Path="+path); |
| File file = new File (path); |
| file.getParentFile().mkdirs(); |
| file.createNewFile(); |
| long start = System.currentTimeMillis(); |
| FileWriter writer = new FileWriter(file); |
| BufferedWriter bufferedWriter = new BufferedWriter(writer, bufSize); |
| |
| for (String record: records) { |
| bufferedWriter.write(record); |
| } |
| bufferedWriter.flush(); |
| bufferedWriter.close(); |
| long end = System.currentTimeMillis(); |
| System.out.println((end - start) / 1000f + " seconds"); |
| } |
| } |