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8279339: (ch) Input/Output streams returned by Channels factory methods don't support concurrent read/write ops

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Reviewed-by: lancea, bpb
This commit is contained in:
Alan Bateman 2022-01-06 08:12:53 +00:00
parent 456bd1ed1c
commit 2dbb936da9
8 changed files with 791 additions and 156 deletions
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8
src/java.base/share/classes/java/nio/channels/Channels.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 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
@ -40,8 +40,6 @@ import java.nio.charset.UnsupportedCharsetException;
import java.nio.channels.spi.AbstractInterruptibleChannel;
import java.util.Objects;
import java.util.concurrent.ExecutionException;
import sun.nio.ch.ChannelInputStream;
import sun.nio.ch.ChannelOutputStream;
import sun.nio.cs.StreamDecoder;
import sun.nio.cs.StreamEncoder;
@ -87,7 +85,7 @@ public final class Channels {
*/
public static InputStream newInputStream(ReadableByteChannel ch) {
Objects.requireNonNull(ch, "ch");
return new ChannelInputStream(ch);
return sun.nio.ch.Streams.of(ch);
}
/**
@ -106,7 +104,7 @@ public final class Channels {
*/
public static OutputStream newOutputStream(WritableByteChannel ch) {
Objects.requireNonNull(ch, "ch");
return new ChannelOutputStream(ch);
return sun.nio.ch.Streams.of(ch);
}
/**

118
src/java.base/share/classes/sun/nio/ch/ChannelInputStream.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
* 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
@ -40,58 +40,52 @@ import java.util.Objects;
import jdk.internal.util.ArraysSupport;
/**
* This class is defined here rather than in java.nio.channels.Channels
* so that code can be shared with SocketAdaptor.
* An InputStream that reads bytes from a channel.
*
* @author Mike McCloskey
* @author Mark Reinhold
* @since 1.4
*/
public class ChannelInputStream
extends InputStream
{
class ChannelInputStream extends InputStream {
private static final int DEFAULT_BUFFER_SIZE = 8192;
public static int read(ReadableByteChannel ch, ByteBuffer bb,
boolean block)
throws IOException
{
private final ReadableByteChannel ch;
private ByteBuffer bb;
private byte[] bs; // Invoker's previous array
private byte[] b1;
/**
* Initialize a ChannelInputStream that reads from the given channel.
*/
ChannelInputStream(ReadableByteChannel ch) {
this.ch = ch;
}
/**
* Reads a sequence of bytes from the channel into the given buffer.
*/
private int read(ByteBuffer bb) throws IOException {
if (ch instanceof SelectableChannel sc) {
synchronized (sc.blockingLock()) {
boolean bm = sc.isBlocking();
if (!bm)
if (!sc.isBlocking())
throw new IllegalBlockingModeException();
if (bm != block)
sc.configureBlocking(block);
int n = ch.read(bb);
if (bm != block)
sc.configureBlocking(bm);
return n;
return ch.read(bb);
}
} else {
return ch.read(bb);
}
}
protected final ReadableByteChannel ch;
private ByteBuffer bb = null;
private byte[] bs = null; // Invoker's previous array
private byte[] b1 = null;
public ChannelInputStream(ReadableByteChannel ch) {
this.ch = ch;
}
@Override
public synchronized int read() throws IOException {
if (b1 == null)
b1 = new byte[1];
int n = this.read(b1);
int n = read(b1);
if (n == 1)
return b1[0] & 0xff;
return -1;
}
@Override
public synchronized int read(byte[] bs, int off, int len)
throws IOException
{
@ -109,12 +103,6 @@ public class ChannelInputStream
return read(bb);
}
protected int read(ByteBuffer bb)
throws IOException
{
return ChannelInputStream.read(ch, bb, true);
}
@Override
public byte[] readAllBytes() throws IOException {
if (!(ch instanceof SeekableByteChannel sbc))
@ -201,6 +189,7 @@ public class ChannelInputStream
return (capacity == nread) ? buf : Arrays.copyOf(buf, nread);
}
@Override
public int available() throws IOException {
// special case where the channel is to a file
if (ch instanceof SeekableByteChannel sbc) {
@ -210,6 +199,7 @@ public class ChannelInputStream
return 0;
}
@Override
public synchronized long skip(long n) throws IOException {
// special case where the channel is to a file
if (ch instanceof SeekableByteChannel sbc) {
@ -230,46 +220,62 @@ public class ChannelInputStream
return super.skip(n);
}
public void close() throws IOException {
ch.close();
}
@Override
public long transferTo(OutputStream out) throws IOException {
Objects.requireNonNull(out, "out");
if (out instanceof ChannelOutputStream cos
&& ch instanceof FileChannel fc) {
WritableByteChannel wbc = cos.channel();
if (wbc instanceof FileChannel dst) {
return transfer(fc, dst);
}
if (wbc instanceof SelectableChannel sc) {
if (ch instanceof FileChannel fc) {
// FileChannel -> SocketChannel
if (out instanceof SocketOutputStream sos) {
SocketChannelImpl sc = sos.channel();
synchronized (sc.blockingLock()) {
if (!sc.isBlocking())
throw new IllegalBlockingModeException();
return transfer(fc, wbc);
return transfer(fc, sc);
}
}
return transfer(fc, wbc);
// FileChannel -> WritableByteChannel
if (out instanceof ChannelOutputStream cos) {
WritableByteChannel wbc = cos.channel();
if (wbc instanceof SelectableChannel sc) {
synchronized (sc.blockingLock()) {
if (!sc.isBlocking())
throw new IllegalBlockingModeException();
return transfer(fc, wbc);
}
}
return transfer(fc, wbc);
}
}
return super.transferTo(out);
}
private static long transfer(FileChannel src, WritableByteChannel dst) throws IOException {
long initialPos = src.position();
/**
* Transfers all bytes from a channel's file to a target writeable byte channel.
* If the writeable byte channel is a selectable channel then it must be in
* blocking mode.
*/
private static long transfer(FileChannel fc, WritableByteChannel target)
throws IOException
{
long initialPos = fc.position();
long pos = initialPos;
try {
while (pos < src.size()) {
pos += src.transferTo(pos, Long.MAX_VALUE, dst);
while (pos < fc.size()) {
pos += fc.transferTo(pos, Long.MAX_VALUE, target);
}
} finally {
src.position(pos);
fc.position(pos);
}
return pos - initialPos;
}
@Override
public void close() throws IOException {
ch.close();
}
}

89
src/java.base/share/classes/sun/nio/ch/ChannelOutputStream.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2021, 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
@ -25,68 +25,30 @@
package sun.nio.ch;
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.channels.spi.*;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.IllegalBlockingModeException;
import java.nio.channels.SelectableChannel;
import java.nio.channels.WritableByteChannel;
import java.util.Objects;
/**
* This class is defined here rather than in java.nio.channels.Channels
* so that it will be accessible from java.nio.channels.Channels and
* sun.nio.ch.ChannelInputStream.
*
* An OutputStream that writes bytes to a channel.
*
* @author Mark Reinhold
* @author Mike McCloskey
* @author JSR-51 Expert Group
* @since 18
*/
public class ChannelOutputStream extends OutputStream {
class ChannelOutputStream extends OutputStream {
private final WritableByteChannel ch;
private ByteBuffer bb;
private byte[] bs; // Invoker's previous array
private byte[] b1;
/**
* Write all remaining bytes in buffer to the given channel.
* If the channel is selectable then it must be configured blocking.
* Initialize a ChannelOutputStream that writes to the given channel.
*/
private static void writeFullyImpl(WritableByteChannel ch, ByteBuffer bb)
throws IOException
{
while (bb.remaining() > 0) {
int n = ch.write(bb);
if (n <= 0)
throw new RuntimeException("no bytes written");
}
}
/**
* Write all remaining bytes in buffer to the given channel.
*
* @throws IllegalBlockingModeException
* If the channel is selectable and configured non-blocking.
*/
private static void writeFully(WritableByteChannel ch, ByteBuffer bb)
throws IOException
{
if (ch instanceof SelectableChannel sc) {
synchronized (sc.blockingLock()) {
if (!sc.isBlocking())
throw new IllegalBlockingModeException();
writeFullyImpl(ch, bb);
}
} else {
writeFullyImpl(ch, bb);
}
}
/**
* @param ch The channel wrapped by this stream.
*/
public ChannelOutputStream(WritableByteChannel ch) {
ChannelOutputStream(WritableByteChannel ch) {
this.ch = ch;
}
@ -97,17 +59,30 @@ public class ChannelOutputStream extends OutputStream {
return ch;
}
/**
* Write all remaining bytes in buffer to the channel.
* If the channel is selectable then it must be configured blocking.
*/
private void writeFully(ByteBuffer bb) throws IOException {
while (bb.remaining() > 0) {
int n = ch.write(bb);
if (n <= 0)
throw new RuntimeException("no bytes written");
}
}
@Override
public synchronized void write(int b) throws IOException {
if (b1 == null)
b1 = new byte[1];
b1[0] = (byte) b;
this.write(b1);
write(b1);
}
@Override
public synchronized void write(byte[] bs, int off, int len)
throws IOException {
throws IOException
{
Objects.checkFromIndexSize(off, len, bs.length);
if (len == 0) {
return;
@ -119,12 +94,20 @@ public class ChannelOutputStream extends OutputStream {
bb.position(off);
this.bb = bb;
this.bs = bs;
writeFully(ch, bb);
if (ch instanceof SelectableChannel sc) {
synchronized (sc.blockingLock()) {
if (!sc.isBlocking())
throw new IllegalBlockingModeException();
writeFully(bb);
}
} else {
writeFully(bb);
}
}
@Override
public void close() throws IOException {
ch.close();
}
}

45
src/java.base/share/classes/sun/nio/ch/SocketAdaptor.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 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
@ -177,32 +177,7 @@ class SocketAdaptor
throw new SocketException("Socket is not connected");
if (!sc.isInputOpen())
throw new SocketException("Socket input is shutdown");
return new InputStream() {
@Override
public int read() throws IOException {
byte[] a = new byte[1];
int n = read(a, 0, 1);
return (n > 0) ? (a[0] & 0xff) : -1;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int timeout = SocketAdaptor.this.timeout;
if (timeout > 0) {
long nanos = MILLISECONDS.toNanos(timeout);
return sc.blockingRead(b, off, len, nanos);
} else {
return sc.blockingRead(b, off, len, 0);
}
}
@Override
public int available() throws IOException {
return sc.available();
}
@Override
public void close() throws IOException {
sc.close();
}
};
return new SocketInputStream(sc, () -> timeout);
}
@Override
@ -213,21 +188,7 @@ class SocketAdaptor
throw new SocketException("Socket is not connected");
if (!sc.isOutputOpen())
throw new SocketException("Socket output is shutdown");
return new OutputStream() {
@Override
public void write(int b) throws IOException {
byte[] a = new byte[]{(byte) b};
write(a, 0, 1);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
sc.blockingWriteFully(b, off, len);
}
@Override
public void close() throws IOException {
sc.close();
}
};
return new SocketOutputStream(sc);
}
private void setBooleanOption(SocketOption<Boolean> name, boolean value)

83
src/java.base/share/classes/sun/nio/ch/SocketInputStream.java Normal file
View file

@ -0,0 +1,83 @@
/*
* Copyright (c) 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package sun.nio.ch;
import java.io.IOException;
import java.io.InputStream;
import java.util.function.IntSupplier;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
/**
* An InputStream that reads bytes from a socket channel.
*/
class SocketInputStream extends InputStream {
private final SocketChannelImpl sc;
private final IntSupplier timeoutSupplier;
/**
* Initialize a SocketInputStream that reads from the given socket channel.
* @param sc the socket channel
* @param timeoutSupplier supplies the read timeout, in milliseconds
*/
SocketInputStream(SocketChannelImpl sc, IntSupplier timeoutSupplier) {
this.sc = sc;
this.timeoutSupplier = timeoutSupplier;
}
/**
* Initialize a SocketInputStream that reads from the given socket channel.
*/
SocketInputStream(SocketChannelImpl sc) {
this(sc, () -> 0);
}
@Override
public int read() throws IOException {
byte[] a = new byte[1];
int n = read(a, 0, 1);
return (n > 0) ? (a[0] & 0xff) : -1;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int timeout = timeoutSupplier.getAsInt();
if (timeout > 0) {
long nanos = MILLISECONDS.toNanos(timeout);
return sc.blockingRead(b, off, len, nanos);
} else {
return sc.blockingRead(b, off, len, 0);
}
}
@Override
public int available() throws IOException {
return sc.available();
}
@Override
public void close() throws IOException {
sc.close();
}
}

65
src/java.base/share/classes/sun/nio/ch/SocketOutputStream.java Normal file
View file

@ -0,0 +1,65 @@
/*
* Copyright (c) 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package sun.nio.ch;
import java.io.IOException;
import java.io.OutputStream;
/**
* An OutputStream that writes bytes to a socket channel.
*/
class SocketOutputStream extends OutputStream {
private final SocketChannelImpl sc;
/**
* Initialize a SocketOutputStream that writes to the given socket channel.
*/
SocketOutputStream(SocketChannelImpl sc) {
this.sc = sc;
}
/**
* Returns the socket channel.
*/
SocketChannelImpl channel() {
return sc;
}
@Override
public void write(int b) throws IOException {
byte[] a = new byte[]{(byte) b};
write(a, 0, 1);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
sc.blockingWriteFully(b, off, len);
}
@Override
public void close() throws IOException {
sc.close();
}
}

59
src/java.base/share/classes/sun/nio/ch/Streams.java Normal file
View file

@ -0,0 +1,59 @@
/*
* Copyright (c) 2021, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package sun.nio.ch;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
/**
* Factory methods for input/output streams based on channels.
*/
public class Streams {
private Streams() { }
/**
* Return an input stream that reads bytes from the given channel.
*/
public static InputStream of(ReadableByteChannel ch) {
if (ch instanceof SocketChannelImpl sc) {
return new SocketInputStream(sc);
} else {
return new ChannelInputStream(ch);
}
}
/**
* Return an output stream that writes bytes to the given channel.
*/
public static OutputStream of(WritableByteChannel ch) {
if (ch instanceof SocketChannelImpl sc) {
return new SocketOutputStream(sc);
} else {
return new ChannelOutputStream(ch);
}
}
}

480
test/jdk/java/nio/channels/Channels/SocketChannelStreams.java Normal file
View file

@ -0,0 +1,480 @@
/*
* Copyright (c) 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 8279339
* @run testng SocketChannelStreams
* @summary Exercise InputStream/OutputStream returned by Channels.newXXXStream
* when channel is a SocketChannel
*/
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.channels.Channels;
import java.nio.channels.IllegalBlockingModeException;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Objects;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.testng.annotations.*;
import static org.testng.Assert.*;
@Test
public class SocketChannelStreams {
private ScheduledExecutorService executor;
@BeforeClass()
public void init() {
executor = Executors.newSingleThreadScheduledExecutor();
}
@AfterClass
public void finish() {
executor.shutdown();
}
/**
* Test read when bytes are available.
*/
public void testRead1() throws Exception {
withConnection((sc, peer) -> {
write(peer, 99);
int n = Channels.newInputStream(sc).read();
assertEquals(n, 99);
});
}
/**
* Test read blocking before bytes are available.
*/
public void testRead2() throws Exception {
withConnection((sc, peer) -> {
scheduleWrite(peer, 99, 1000);
int n = Channels.newInputStream(sc).read();
assertEquals(n, 99);
});
}
/**
* Test read after peer has closed connection.
*/
public void testRead3() throws Exception {
withConnection((sc, peer) -> {
peer.close();
int n = Channels.newInputStream(sc).read();
assertEquals(n, -1);
});
}
/**
* Test read blocking before peer closes connection.
*/
public void testRead4() throws Exception {
withConnection((sc, peer) -> {
scheduleClose(peer, 1000);
int n = Channels.newInputStream(sc).read();
assertEquals(n, -1);
});
}
/**
* Test async close of channel when thread blocked in read.
*/
public void testRead5() throws Exception {
withConnection((sc, peer) -> {
scheduleClose(sc, 2000);
InputStream in = Channels.newInputStream(sc);
expectThrows(IOException.class, () -> in.read());
});
}
/**
* Test async close of input stream, when thread blocked in read.
*/
public void testRead6() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
scheduleClose(in, 2000);
expectThrows(IOException.class, () -> in.read());
});
}
/**
* Test interrupt status set before read.
*/
public void testRead7() throws Exception {
withConnection((sc, peer) -> {
Thread.currentThread().interrupt();
try {
InputStream in = Channels.newInputStream(sc);
expectThrows(IOException.class, () -> in.read());
} finally {
Thread.interrupted(); // clear interrupt
}
assertFalse(sc.isOpen());
});
}
/**
* Test interrupt of thread blocked in read.
*/
public void testRead8() throws Exception {
withConnection((sc, peer) -> {
Future<?> interrupter = scheduleInterrupt(Thread.currentThread(), 2000);
try {
InputStream in = Channels.newInputStream(sc);
expectThrows(IOException.class, () -> in.read());
} finally {
interrupter.cancel(true);
Thread.interrupted(); // clear interrupt
}
assertFalse(sc.isOpen());
});
}
/**
* Test that read is untimed when SO_TIMEOUT is set on the Socket adaptor.
*/
public void testRead9() throws Exception {
withConnection((sc, peer) -> {
sc.socket().setSoTimeout(100);
scheduleWrite(peer, 99, 2000);
// read should block until bytes are available
int b = Channels.newInputStream(sc).read();
assertTrue(b == 99);
});
}
/**
* Test write.
*/
public void testWrite1() throws Exception {
withConnection((sc, peer) -> {
OutputStream out = Channels.newOutputStream(sc);
out.write(99);
int n = read(peer);
assertEquals(n, 99);
});
}
/**
* Test async close of channel when thread blocked in write.
*/
public void testWrite2() throws Exception {
withConnection((sc, peer) -> {
scheduleClose(sc, 2000);
expectThrows(IOException.class, () -> {
OutputStream out = Channels.newOutputStream(sc);
byte[] data = new byte[64*1000];
while (true) {
out.write(data);
}
});
});
}
/**
* Test async close of output stream when thread blocked in write.
*/
public void testWrite3() throws Exception {
withConnection((sc, peer) -> {
OutputStream out = Channels.newOutputStream(sc);
scheduleClose(out, 2000);
expectThrows(IOException.class, () -> {
byte[] data = new byte[64*1000];
while (true) {
out.write(data);
}
});
});
}
/**
* Test interrupt status set before write.
*/
public void testWrite4() throws Exception {
withConnection((sc, peer) -> {
Thread.currentThread().interrupt();
try {
OutputStream out = Channels.newOutputStream(sc);
expectThrows(IOException.class, () -> out.write(99));
} finally {
Thread.interrupted(); // clear interrupt
}
assertFalse(sc.isOpen());
});
}
/**
* Test interrupt of thread blocked in write.
*/
public void testWrite5() throws Exception {
withConnection((sc, peer) -> {
Future<?> interrupter = scheduleInterrupt(Thread.currentThread(), 2000);
try {
expectThrows(IOException.class, () -> {
OutputStream out = Channels.newOutputStream(sc);
byte[] data = new byte[64*1000];
while (true) {
out.write(data);
}
});
} finally {
interrupter.cancel(true);
Thread.interrupted(); // clear interrupt
}
assertFalse(sc.isOpen());
});
}
/**
* Test read when another thread is blocked in write. The read should
* complete immediately.
*/
public void testConcurrentReadWrite1() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
// block thread in write
fork(() -> {
var data = new byte[64*1024];
for (;;) {
out.write(data);
}
});
Thread.sleep(1000); // give writer time to block
// test read, should not be blocked by writer thread
write(peer, 99);
int n = in.read();
assertEquals(n, 99);
});
}
/**
* Test read when another thread is blocked in write. The read should
* block until bytes are available.
*/
public void testConcurrentReadWrite2() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
// block thread in write
fork(() -> {
var data = new byte[64*1024];
for (;;) {
out.write(data);
}
});
Thread.sleep(1000); // give writer time to block
// test read, should not be blocked by writer thread
scheduleWrite(peer, 99, 500);
int n = in.read();
assertEquals(n, 99);
});
}
/**
* Test writing when another thread is blocked in read.
*/
public void testConcurrentReadWrite3() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
// block thread in read
fork(() -> {
in.read();
});
Thread.sleep(100); // give reader time to block
// test write, should not be blocked by reader thread
out.write(99);
int n = read(peer);
assertEquals(n, 99);
});
}
/**
* Test read/write when channel configured non-blocking.
*/
public void testIllegalBlockingMode() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
sc.configureBlocking(false);
expectThrows(IllegalBlockingModeException.class, () -> in.read());
expectThrows(IllegalBlockingModeException.class, () -> out.write(99));
});
}
/**
* Test NullPointerException.
*/
public void testNullPointerException() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
expectThrows(NullPointerException.class, () -> in.read(null));
expectThrows(NullPointerException.class, () -> in.read(null, 0, 0));
expectThrows(NullPointerException.class, () -> out.write(null));
expectThrows(NullPointerException.class, () -> out.write(null, 0, 0));
});
}
/**
* Test IndexOutOfBoundsException.
*/
public void testIndexOutOfBoundsException() throws Exception {
withConnection((sc, peer) -> {
InputStream in = Channels.newInputStream(sc);
OutputStream out = Channels.newOutputStream(sc);
byte[] ba = new byte[100];
expectThrows(IndexOutOfBoundsException.class, () -> in.read(ba, -1, 1));
expectThrows(IndexOutOfBoundsException.class, () -> in.read(ba, 0, -1));
expectThrows(IndexOutOfBoundsException.class, () -> in.read(ba, 0, 1000));
expectThrows(IndexOutOfBoundsException.class, () -> in.read(ba, 1, 100));
expectThrows(IndexOutOfBoundsException.class, () -> out.write(ba, -1, 1));
expectThrows(IndexOutOfBoundsException.class, () -> out.write(ba, 0, -1));
expectThrows(IndexOutOfBoundsException.class, () -> out.write(ba, 0, 1000));
expectThrows(IndexOutOfBoundsException.class, () -> out.write(ba, 1, 100));
});
}
// -- test infrastructure --
private interface ThrowingTask {
void run() throws Exception;
}
private interface ThrowingBiConsumer<T, U> {
void accept(T t, U u) throws Exception;
}
/**
* Invokes the consumer with a connected pair of socket channels.
*/
private static void withConnection(ThrowingBiConsumer<SocketChannel, SocketChannel> consumer)
throws Exception
{
var loopback = InetAddress.getLoopbackAddress();
try (ServerSocketChannel listener = ServerSocketChannel.open()) {
listener.bind(new InetSocketAddress(loopback, 0));
try (SocketChannel sc = SocketChannel.open(listener.getLocalAddress())) {
try (SocketChannel peer = listener.accept()) {
consumer.accept(sc, peer);
}
}
}
}
/**
* Forks a thread to execute the given task.
*/
private Future<?> fork(ThrowingTask task) {
ExecutorService pool = Executors.newFixedThreadPool(1);
try {
return pool.submit(() -> {
task.run();
return null;
});
} finally {
pool.shutdown();
}
}
/**
* Read a byte from the given socket channel.
*/
private int read(SocketChannel sc) throws IOException {
return sc.socket().getInputStream().read();
}
/**
* Write a byte to the given socket channel.
*/
private void write(SocketChannel sc, int b) throws IOException {
sc.socket().getOutputStream().write(b);
}
/**
* Writes the given data to the socket channel after a delay.
*/
private Future<?> scheduleWrite(SocketChannel sc, byte[] data, long delay) {
return schedule(() -> {
try {
sc.socket().getOutputStream().write(data);
} catch (IOException ioe) { }
}, delay);
}
/**
* Writes a byte to the socket channel after a delay.
*/
private Future<?> scheduleWrite(SocketChannel sc, int b, long delay) {
return scheduleWrite(sc, new byte[] { (byte)b }, delay);
}
/**
* Closes the given object after a delay.
*/
private Future<?> scheduleClose(Closeable c, long delay) {
return schedule(() -> {
try {
c.close();
} catch (IOException ioe) { }
}, delay);
}
/**
* Interrupts the given Thread after a delay.
*/
private Future<?> scheduleInterrupt(Thread t, long delay) {
return schedule(() -> t.interrupt(), delay);
}
/**
* Schedules the given task to run after a delay.
*/
private Future<?> schedule(Runnable task, long delay) {
return executor.schedule(task, delay, TimeUnit.MILLISECONDS);
}
}