1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.bench.java.io; 24 25 import org.openjdk.bench.java.io.BlackholedOutputStream; 26 import org.openjdk.jmh.annotations.Benchmark; 27 import org.openjdk.jmh.annotations.BenchmarkMode; 28 import org.openjdk.jmh.annotations.Mode; 29 import org.openjdk.jmh.annotations.OutputTimeUnit; 30 import org.openjdk.jmh.annotations.Scope; 31 import org.openjdk.jmh.annotations.Setup; 32 import org.openjdk.jmh.annotations.State; 33 import org.openjdk.jmh.annotations.TearDown; 34 import org.openjdk.jmh.infra.Blackhole; 35 36 import java.io.IOException; 37 import java.io.ObjectOutputStream; 38 import java.io.ObjectStreamException; 39 import java.io.Serializable; 40 import java.util.concurrent.TimeUnit; 41 42 @BenchmarkMode(Mode.AverageTime) 43 @OutputTimeUnit(TimeUnit.NANOSECONDS) 44 @State(Scope.Thread) 45 public class SerializationWriteReplace { 46 47 private BlackholedOutputStream bos; 48 private ObjectOutputStream os; 49 50 @Setup setupStreams(Blackhole bh)51 public void setupStreams(Blackhole bh) throws IOException { 52 bos = new BlackholedOutputStream(bh); 53 os = new ObjectOutputStream(bos); 54 } 55 56 @TearDown downStreams()57 public void downStreams() throws IOException { 58 os.close(); 59 bos.close(); 60 os = null; 61 bos = null; 62 } 63 64 @Benchmark writeReplace()65 public void writeReplace() throws IOException, ClassNotFoundException { 66 os.writeObject(new Class2()); 67 } 68 69 public abstract static class Base implements Serializable { 70 private static final long serialVersionUID = 1L; 71 } 72 73 public static class Class1 extends Base { 74 private static final long serialVersionUID = 2L; 75 } 76 77 public static class Class2 extends Class1 { 78 private static final long serialVersionUID = 3L; writeReplace()79 Object writeReplace() throws ObjectStreamException { 80 return new Class3(); 81 } 82 } 83 84 public static class Class3 extends Base { 85 private static final long serialVersionUID = 4L; 86 private String tuto = "tuto"; 87 private byte b = (byte) 0xff; 88 } 89 90 } 91