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/*
* Copyright (c) 2001, 2022, 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 4638365
* @summary Test FileChannel.transferFrom and transferTo for 4GB files
* @build FileChannelUtils
* @run testng/timeout=300 Transfer4GBFile
*/
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.TimeUnit;
import org.testng.annotations.Test;
import static java.nio.file.StandardOpenOption.*;
public class Transfer4GBFile {
private static PrintStream err = System.err;
private static PrintStream out = System.out;
// Test transferTo with large file
@Test
public void xferTest04() throws Exception { // for bug 4638365
Path source = FileChannelUtils.createSparseTempFile("blah", null);
source.toFile().deleteOnExit();
long testSize = ((long)Integer.MAX_VALUE) * 2;
out.println(" Writing large file...");
long t0 = System.nanoTime();
try (FileChannel fc = FileChannel.open(source, READ, WRITE)) {
fc.write(ByteBuffer.wrap("Use the source!".getBytes()), testSize - 40);
long t1 = System.nanoTime();
out.printf(" Wrote large file in %d ns (%d ms) %n",
t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
}
Path sink = Files.createTempFile("sink", null);
sink.toFile().deleteOnExit();
try (FileChannel sourceChannel = FileChannel.open(source, READ);
FileChannel sinkChannel = FileChannel.open(sink, WRITE)) {
long bytesWritten = sourceChannel.transferTo(testSize - 40, 10,
sinkChannel);
if (bytesWritten != 10) {
throw new RuntimeException("Transfer test 4 failed " +
bytesWritten);
}
}
Files.delete(source);
Files.delete(sink);
}
// Test transferFrom with large file
@Test
public void xferTest05() throws Exception { // for bug 4638365
// Create a source file & large sink file for the test
Path source = Files.createTempFile("blech", null);
source.toFile().deleteOnExit();
initTestFile(source, 100);
// Create the sink file as a sparse file if possible
Path sink = FileChannelUtils.createSparseTempFile("sink", null);
sink.toFile().deleteOnExit();
long testSize = ((long)Integer.MAX_VALUE) * 2;
try (FileChannel fc = FileChannel.open(sink, WRITE)){
out.println(" Writing large file...");
long t0 = System.nanoTime();
fc.write(ByteBuffer.wrap("Use the source!".getBytes()),
testSize - 40);
long t1 = System.nanoTime();
out.printf(" Wrote large file in %d ns (%d ms) %n",
t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
} catch (IOException e) {
// Can't set up the test, abort it
err.println("xferTest05 was aborted.");
return;
}
// Get new channels for the source and sink and attempt transfer
try (FileChannel sourceChannel = FileChannel.open(source, READ);
FileChannel sinkChannel = FileChannel.open(sink, WRITE)) {
long bytesWritten = sinkChannel.transferFrom(sourceChannel,
testSize - 40, 10);
if (bytesWritten != 10) {
throw new RuntimeException("Transfer test 5 failed " +
bytesWritten);
}
}
Files.delete(source);
Files.delete(sink);
}
/**
* Creates file blah of specified size in bytes.
*/
private static void initTestFile(Path blah, long size) throws Exception {
try (BufferedWriter awriter = Files.newBufferedWriter(blah,
StandardCharsets.ISO_8859_1)) {
for (int i = 0; i < size; i++) {
awriter.write("e");
}
}
}
}
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