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 }