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