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/*
* Copyright (c) 2013, 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.
*/
/* @test
* @bug 8026344
* @summary Exercise classes in j.u.c.atomic that use serialization proxies
*/
import java.util.concurrent.atomic.DoubleAdder;
import java.util.concurrent.atomic.DoubleAccumulator;
import java.util.concurrent.atomic.LongAdder;
import java.util.concurrent.atomic.LongAccumulator;
import java.util.function.DoubleBinaryOperator;
import java.util.function.LongBinaryOperator;
import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.Serializable;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;
/**
* Basic test to exercise the j.u.c.atomic classes that use serialization
* proxies.
*/
public class Serial {
public static void main(String[] args) {
testDoubleAdder();
testDoubleAccumulator();
testLongAdder();
testLongAccumulator();
}
static void testDoubleAdder() {
DoubleAdder a = new DoubleAdder();
a.add(20.1d);
DoubleAdder result = echo(a);
if (result.doubleValue() != a.doubleValue())
throw new RuntimeException("Unexpected doubleValue");
checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAdder$SerializationProxy");
}
static void testDoubleAccumulator() {
DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
a.accumulate(17.5d);
DoubleAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
static void testLongAdder() {
LongAdder a = new LongAdder();
a.add(45);
LongAdder result = echo(a);
if (result.longValue() != a.longValue())
throw new RuntimeException("Unexpected longValue");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAdder$SerializationProxy");
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
/**
* Serialize the given object, returning the reconstituted object.
*/
@SuppressWarnings("unchecked")
static <T extends Serializable> T echo(T obj) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try (ObjectOutputStream oos = new ObjectOutputStream(out)) {
oos.writeObject(obj);
} catch (IOException e) {
throw new RuntimeException("Serialization failed: " + e);
}
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
try (ObjectInputStream ois = new ObjectInputStream(in)) {
return (T) ois.readObject();
} catch (IOException | ClassNotFoundException e) {
throw new RuntimeException("Deserialization failed: " + e);
}
}
/**
* Checks that the given object serializes to the expected class.
*/
static void checkSerialClassName(Serializable obj, String expected) {
String cn = serialClassName(obj);
if (!cn.equals(expected))
throw new RuntimeException(obj.getClass() + " serialized as " + cn
+ ", expected " + expected);
}
/**
* Returns the class name that the given object serializes as.
*/
static String serialClassName(Serializable obj) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try (ObjectOutputStream oos = new ObjectOutputStream(out)) {
oos.writeObject(obj);
} catch (IOException e) {
throw new RuntimeException("Serialization failed: " + e);
}
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
try (DataInputStream dis = new DataInputStream(in)) {
dis.readShort(); // STREAM_MAGIC
dis.readShort(); // STREAM_VERSION
dis.readByte(); // TC_OBJECT
dis.readByte(); // TC_CLASSDESC
return dis.readUTF(); // className
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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