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/*
* Copyright (c) 2002, 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 4652496 8274112
* @summary Test transferTo with different target channels
* @library /test/lib
* @build jdk.test.lib.RandomFactory
* @run main TransferToChannel
* @run main/othervm -Djdk.nio.enableFastFileTransfer TransferToChannel
* @key randomness
*/
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.Random;
import jdk.test.lib.RandomFactory;
public class TransferToChannel {
private static final Random RAND = RandomFactory.getRandom();
// Chunk size should be larger than FileChannelImpl.TRANSFER_SIZE (8192)
// for a good test
private static final int CHUNK_SIZE = 9*1024;
// File size should be a value much larger than CHUNK_SIZE
private static final int FILE_SIZE = 1000*1024;
// The minimum direct transfer size should be less than the file size
// but still substantial
private static final int MIN_DIRECT_TRANSFER_SIZE = FILE_SIZE/2;
private static File file;
private static File outFile;
private static FileChannel in;
public static void main(String[] args) throws Exception {
file = File.createTempFile("readingin", null);
outFile = File.createTempFile("writingout", null);
file.deleteOnExit();
outFile.deleteOnExit();
generateBigFile(file);
FileInputStream fis = new FileInputStream(file);
in = fis.getChannel();
test1();
test2();
test3();
in.close();
file.delete();
outFile.delete();
}
private static void test1() throws Exception {
for (int i=0; i<10; i++) {
transferFileToUserChannel();
System.gc();
System.err.println("Transferred file to user channel...");
}
}
private static void test2() throws Exception {
for (int i=0; i<10; i++) {
transferFileToTrustedChannel();
System.gc();
System.err.println("Transferred file to trusted channel...");
}
}
private static void test3() throws Exception {
for (int i=0; i<10; i++) {
transferFileDirectly();
System.gc();
System.err.println("Transferred file directly...");
}
}
private static void transferFileToUserChannel() throws Exception {
long remainingBytes = in.size();
long size = remainingBytes;
WritableByteChannel wbc = new WritableByteChannel() {
Random rand = new Random(0);
public int write(ByteBuffer src) throws IOException {
int read = src.remaining();
byte[] incoming = new byte[read];
src.get(incoming);
checkData(incoming, read);
return read == 0 ? -1 : read;
}
public boolean isOpen() {
return true;
}
public void close() throws IOException {
}
void checkData(byte[] incoming, int size) {
byte[] expected = new byte[size];
rand.nextBytes(expected);
if (!Arrays.equals(incoming, expected))
throw new RuntimeException("Data corrupted");
}
};
while (remainingBytes > 0) {
long bytesTransferred = in.transferTo(size - remainingBytes,
Math.min(CHUNK_SIZE, remainingBytes), wbc);
if (bytesTransferred >= 0)
remainingBytes -= bytesTransferred;
else
throw new Exception("transfer failed");
}
}
private static void transferFileToTrustedChannel() throws Exception {
long remainingBytes = in.size();
long size = remainingBytes;
FileOutputStream fos = new FileOutputStream(outFile);
FileChannel out = fos.getChannel();
while (remainingBytes > 0) {
long bytesTransferred = in.transferTo(size - remainingBytes,
CHUNK_SIZE, out);
if (bytesTransferred >= 0)
remainingBytes -= bytesTransferred;
else
throw new Exception("transfer failed");
}
out.close();
}
private static void transferFileDirectly() throws Exception {
outFile.delete();
final long size = in.size();
final long position = RAND.nextInt((int)size - MIN_DIRECT_TRANSFER_SIZE);
try (FileOutputStream fos = new FileOutputStream(outFile);
FileChannel out = fos.getChannel()) {
assert out.position() == 0;
long pos = position;
while (pos < size) {
long bytesTransferred = in.transferTo(pos, Long.MAX_VALUE, out);
if (bytesTransferred >= 0)
pos += bytesTransferred;
else {
throw new Exception("transfer failed at " + pos +
" / " + size);
}
}
}
byte[] expected = Files.readAllBytes(file.toPath());
byte[] actual = Files.readAllBytes(outFile.toPath());
if (!Arrays.equals(expected, (int)position, (int)size,
actual, 0, (int)(size - position)))
throw new Exception("Actual bytes do not match expected bytes");
}
private static void generateBigFile(File file) throws Exception {
OutputStream out = new BufferedOutputStream(
new FileOutputStream(file));
byte[] randomBytes = new byte[1024];
Random rand = new Random(0);
int numWritten = 0;
while (numWritten < FILE_SIZE) {
int nwrite = Math.min(randomBytes.length, FILE_SIZE - numWritten);
rand.nextBytes(randomBytes);
out.write(randomBytes, 0, nwrite);
numWritten += nwrite;
}
out.flush();
out.close();
}
}
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