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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package org.openjdk.bench.java.io; 26 27 import org.openjdk.bench.java.io.BlackholedOutputStream; 28 import org.openjdk.jmh.annotations.Benchmark; 29 import org.openjdk.jmh.annotations.BenchmarkMode; 30 import org.openjdk.jmh.annotations.Mode; 31 import org.openjdk.jmh.annotations.OutputTimeUnit; 32 import org.openjdk.jmh.annotations.Scope; 33 import org.openjdk.jmh.annotations.Setup; 34 import org.openjdk.jmh.annotations.State; 35 import org.openjdk.jmh.annotations.TearDown; 36 import org.openjdk.jmh.infra.Blackhole; 37 38 import java.io.IOException; 39 import java.io.ObjectOutputStream; 40 import java.io.ObjectStreamException; 41 import java.io.Serializable; 42 import java.util.concurrent.TimeUnit; 43 44 @BenchmarkMode(Mode.AverageTime) 45 @OutputTimeUnit(TimeUnit.NANOSECONDS) 46 @State(Scope.Thread) 47 public class SerializationWriteReplace { 48 49 private BlackholedOutputStream bos; 50 private ObjectOutputStream os; 51 52 @Setup 53 public void setupStreams(Blackhole bh) throws IOException { 54 bos = new BlackholedOutputStream(bh); 55 os = new ObjectOutputStream(bos); 56 } 57 58 @TearDown 59 public void downStreams() throws IOException { 60 os.close(); 61 bos.close(); 62 os = null; 63 bos = null; 64 } 65 66 @Benchmark 67 public void writeReplace() throws IOException, ClassNotFoundException { 68 os.writeObject(new Class2()); 69 } 70 71 public abstract static class Base implements Serializable { 72 private static final long serialVersionUID = 1L; 73 } 74 75 public static class Class1 extends Base { 76 private static final long serialVersionUID = 2L; 77 } 78 79 public static class Class2 extends Class1 { 80 private static final long serialVersionUID = 3L; 81 Object writeReplace() throws ObjectStreamException { 82 return new Class3(); 83 } 84 } 85 86 public static class Class3 extends Base { 87 private static final long serialVersionUID = 4L; 88 private String tuto = "tuto"; 89 private byte b = (byte) 0xff; 90 } 91 92 }