76 lines
2.8 KiB
Java
76 lines
2.8 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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/* @test
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* @bug 6539707
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* @summary Test behavior of force() with respect to throwing exceptions
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* @run main ForceException
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*/
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import java.io.File;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.io.UncheckedIOException;
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import java.nio.MappedByteBuffer;
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import java.nio.channels.FileChannel;
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public class ForceException {
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public static void main(String[] args) throws IOException {
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int blockSize = 2048 * 1024;
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int numberOfBlocks = 200;
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int fileLength = numberOfBlocks * blockSize;
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File file = new File(".", "test.dat");
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file.deleteOnExit();
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try (RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
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raf.setLength(fileLength);
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int pos = (numberOfBlocks - 1) * blockSize;
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int size = (int)Math.min(blockSize, fileLength - pos);
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MappedByteBuffer mbb =
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raf.getChannel().map(FileChannel.MapMode.READ_WRITE, pos, size);
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System.out.printf("Write region 0x%s..0x%s%n",
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Long.toHexString(pos), Long.toHexString(size));
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for (int k = 0; k < mbb.limit(); k++) {
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mbb.put(k, (byte)65);
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}
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// Catch and process UncheckedIOException; other Throwables fail
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try {
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System.out.println("Force");
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mbb.force();
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} catch (UncheckedIOException legal) {
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System.out.printf("Caught legal exception %s%n", legal);
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IOException cause = legal.getCause(); // can't be null
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// Throw the cause if flush failed (should be only on Windows)
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if (cause.getMessage().startsWith("Flush failed")) {
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throw cause;
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}
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}
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System.out.println("OK");
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}
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}
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}
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