117 lines
4.4 KiB
Java
117 lines
4.4 KiB
Java
/*
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* Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4833719
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* @summary Verify MappedByteBuffer force on compact, duplicate, and slice views
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* @run testng ForceViews
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*/
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.MappedByteBuffer;
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import java.nio.ReadOnlyBufferException;
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import java.nio.channels.FileChannel;
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import static java.nio.channels.FileChannel.MapMode.*;
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import java.nio.file.Path;
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import static java.nio.file.StandardOpenOption.*;
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import java.util.function.BiFunction;
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import org.testng.Assert;
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import org.testng.annotations.AfterTest;
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import org.testng.annotations.BeforeTest;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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public class ForceViews {
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static record Segment(int position, int length) {}
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private FileChannel fc;
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@BeforeTest(alwaysRun=true)
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public void openChannel() throws IOException {
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Path file = Path.of(".", "junk");
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fc = FileChannel.open(file, CREATE_NEW, READ, WRITE, DELETE_ON_CLOSE);
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ByteBuffer buf = ByteBuffer.wrap(new byte[1024]);
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fc.write(buf);
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fc.position(0);
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}
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@AfterTest(alwaysRun=true)
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public void closeChannel() throws IOException {
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fc.close();
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}
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@DataProvider
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public Object[][] provider() throws IOException {
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BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> absSlice =
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(m, s) -> { return m.slice(s.position, s.length); };
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BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> relSlice =
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(m, s) -> { m.position(s.position); m.limit(s.position + s.length);
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return m.slice(); };
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BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> duplicate=
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(m, s) -> { return m.duplicate(); };
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BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> compact =
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(m, s) -> { return m.compact(); };
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Object[][] result = new Object[][] {
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{"Absolute slice", fc, 256, 512, 128, 128, 32, 32, absSlice},
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{"Relative slice", fc, 256, 512, 0, 128, 32, 32, relSlice},
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{"Duplicate", fc, 256, 512, 0, 256, 32, 32, duplicate},
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{"Compact", fc, 256, 512, 0, 256, 32, 32, compact}
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};
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return result;
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}
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@Test(dataProvider = "provider")
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public void test(String tst, FileChannel fc, int mapPosition, int mapLength,
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int sliceIndex, int sliceLength, int regionOffset, int regionLength,
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BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> f)
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throws Exception {
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MappedByteBuffer mbb = fc.map(READ_WRITE, mapPosition, mapLength);
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mbb = f.apply(mbb, new Segment(sliceIndex, sliceLength));
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for (int i = regionOffset; i < regionOffset + regionLength; i++) {
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mbb.put(i, (byte)i);
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}
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mbb.force(regionOffset, regionOffset + regionLength);
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int fcPos = mapPosition + sliceIndex + regionOffset;
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int mbbPos = regionOffset;
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int length = regionLength;
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ByteBuffer buf = ByteBuffer.allocate(length);
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fc.position(fcPos);
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fc.read(buf);
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for (int i = 0; i < length; i++) {
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int fcVal = buf.get(i);
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int mbbVal = mbb.get(mbbPos + i);
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int val = regionOffset + i;
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Assert.assertTrue(fcVal == val && mbbVal == val,
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String.format("%s: i %d, fcVal %d, mbbVal %d, val %d",
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tst, i, fcVal, mbbVal, val));
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}
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}
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}
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