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package org.glassfish.grizzly.nio.transport;
import java.io.EOFException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Collection;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.grizzly.*;
import org.glassfish.grizzly.asyncqueue.*;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.CompletionHandler;
import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.EmptyCompletionHandler;
import org.glassfish.grizzly.FileTransfer;
import org.glassfish.grizzly.Grizzly;
import org.glassfish.grizzly.GrizzlyFuture;
import org.glassfish.grizzly.PortRange;
import org.glassfish.grizzly.WriteResult;
import org.glassfish.grizzly.Writer;
import org.glassfish.grizzly.filterchain.Filter;
import org.glassfish.grizzly.filterchain.FilterChainEnabledTransport;
import org.glassfish.grizzly.memory.BufferArray;
import org.glassfish.grizzly.memory.ByteBufferArray;
import org.glassfish.grizzly.monitoring.MonitoringUtils;
import org.glassfish.grizzly.nio.*;
import org.glassfish.grizzly.nio.tmpselectors.TemporarySelectorIO;
import org.glassfish.grizzly.nio.tmpselectors.TemporarySelectorsEnabledTransport;
/**
* TCP Transport NIO implementation
*
* @author Alexey Stashok
* @author Jean-Francois Arcand
*/
public final class TCPNIOTransport extends NIOTransport implements
AsyncQueueEnabledTransport, FilterChainEnabledTransport,
TemporarySelectorsEnabledTransport {
private static final Logger LOGGER = Grizzly.logger(TCPNIOTransport.class);
public static final boolean DEFAULT_TCP_NO_DELAY = true;
public static final boolean DEFAULT_KEEP_ALIVE = true;
public static final int DEFAULT_LINGER = -1;
public static final int DEFAULT_SERVER_CONNECTION_BACKLOG = 4096;
private static final String DEFAULT_TRANSPORT_NAME = "TCPNIOTransport";
/**
* The Server connections.
*/
final Collection serverConnections;
/**
* Transport AsyncQueueIO
*/
final AsyncQueueIO asyncQueueIO;
/**
* The socket linger.
*/
int linger = DEFAULT_LINGER;
/**
* The default server connection backlog size
*/
int serverConnectionBackLog = DEFAULT_SERVER_CONNECTION_BACKLOG;
/**
* The socket tcpDelay.
*
* Default value for tcpNoDelay is disabled (set to true).
*/
boolean tcpNoDelay = DEFAULT_TCP_NO_DELAY;
/**
* The socket keepAlive mode.
*/
boolean isKeepAlive = DEFAULT_KEEP_ALIVE;
private final Filter defaultTransportFilter;
final RegisterChannelCompletionHandler selectorRegistrationHandler;
/**
* Default {@link TCPNIOConnectorHandler}
*/
private final TCPNIOConnectorHandler connectorHandler =
new TransportConnectorHandler();
private final TCPNIOBindingHandler bindingHandler =
new TCPNIOBindingHandler(this);
public TCPNIOTransport() {
this(DEFAULT_TRANSPORT_NAME);
}
TCPNIOTransport(final String name) {
super(name);
readBufferSize = DEFAULT_READ_BUFFER_SIZE;
writeBufferSize = DEFAULT_WRITE_BUFFER_SIZE;
selectorRegistrationHandler = new RegisterChannelCompletionHandler();
asyncQueueIO = AsyncQueueIO.Factory.createImmutable(
new TCPNIOAsyncQueueReader(this), new TCPNIOAsyncQueueWriter(this));
attributeBuilder = Grizzly.DEFAULT_ATTRIBUTE_BUILDER;
defaultTransportFilter = new TCPNIOTransportFilter(this);
serverConnections = new ConcurrentLinkedQueue();
}
@Override
protected TemporarySelectorIO createTemporarySelectorIO() {
return new TemporarySelectorIO(new TCPNIOTemporarySelectorReader(this),
new TCPNIOTemporarySelectorWriter(this));
}
@Override
protected void listen() {
for (TCPNIOServerConnection serverConnection : serverConnections) {
try {
listenServerConnection(serverConnection);
} catch (Exception e) {
LOGGER.log(Level.WARNING,
"Exception occurred when starting server connection: " +
serverConnection, e);
}
}
}
@Override
protected int getDefaultSelectorRunnersCount() {
// Consider ACCEPTOR will occupy one selector thread, and depending
// on usecase it might be idle for most of the time -
// so allocate one more extra thread to process channel events
return Runtime.getRuntime().availableProcessors() + 1;
}
void listenServerConnection(TCPNIOServerConnection serverConnection)
throws IOException {
serverConnection.listen();
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final int port) throws IOException {
return bind(new InetSocketAddress(port));
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final String host, final int port)
throws IOException {
return bind(host, port, serverConnectionBackLog);
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final String host, final int port,
final int backlog) throws IOException {
return bind(new InetSocketAddress(host, port), backlog);
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final SocketAddress socketAddress)
throws IOException {
return bind(socketAddress, serverConnectionBackLog);
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final SocketAddress socketAddress,
final int backlog)
throws IOException {
return bindingHandler.bind(socketAddress, backlog);
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bindToInherited() throws IOException {
return bindingHandler.bindToInherited();
}
/**
* {@inheritDoc}
*/
@Override
public TCPNIOServerConnection bind(final String host,
final PortRange portRange, final int backlog) throws IOException {
return (TCPNIOServerConnection) bindingHandler.bind(host, portRange, backlog);
}
/**
* {@inheritDoc}
*/
@Override
public void unbind(Connection connection) {
final Lock lock = state.getStateLocker().writeLock();
lock.lock();
try {
//noinspection SuspiciousMethodCalls
if (connection != null
&& serverConnections.remove(connection)) {
final GrizzlyFuture future = connection.close();
try {
future.get(1000, TimeUnit.MILLISECONDS);
future.recycle(false);
} catch (Exception e) {
LOGGER.log(Level.WARNING, "Error unbinding connection: " + connection, e);
}
}
} finally {
lock.unlock();
}
}
@Override
public void unbindAll() {
final Lock lock = state.getStateLocker().writeLock();
lock.lock();
try {
for (Connection serverConnection : serverConnections) {
try {
unbind(serverConnection);
} catch (Exception e) {
LOGGER.log(Level.FINE,
"Exception occurred when closing server connection: "
+ serverConnection, e);
}
}
serverConnections.clear();
} finally {
lock.unlock();
}
}
/**
* Creates, initializes and connects socket to the specific remote host
* and port and returns {@link Connection}, representing socket.
*
* @param host remote host to connect to.
* @param port remote port to connect to.
* @return {@link GrizzlyFuture} of connect operation, which could be used to get
* resulting {@link Connection}.
*/
@Override
public GrizzlyFuture connect(final String host, final int port) {
return connectorHandler.connect(host, port);
}
/**
* Creates, initializes and connects socket to the specific
* {@link SocketAddress} and returns {@link Connection}, representing socket.
*
* @param remoteAddress remote address to connect to.
* @return {@link GrizzlyFuture} of connect operation, which could be used to get
* resulting {@link Connection}.
*/
@Override
public GrizzlyFuture connect(final SocketAddress remoteAddress) {
return connectorHandler.connect(remoteAddress);
}
/**
* Creates, initializes and connects socket to the specific
* {@link SocketAddress} and returns {@link Connection}, representing socket.
*
* @param remoteAddress remote address to connect to.
* @param completionHandler {@link CompletionHandler}.
*/
@Override
public void connect(final SocketAddress remoteAddress,
final CompletionHandler completionHandler) {
connectorHandler.connect(remoteAddress, completionHandler);
}
/**
* Creates, initializes socket, binds it to the specific local and remote
* {@link SocketAddress} and returns {@link Connection}, representing socket.
*
* @param remoteAddress remote address to connect to.
* @param localAddress local address to bind socket to.
* @return {@link GrizzlyFuture} of connect operation, which could be used to get
* resulting {@link Connection}.
*/
@Override
public GrizzlyFuture connect(final SocketAddress remoteAddress,
final SocketAddress localAddress) {
return connectorHandler.connect(remoteAddress, localAddress);
}
/**
* Creates, initializes socket, binds it to the specific local and remote
* {@link SocketAddress} and returns {@link Connection}, representing socket.
*
* @param remoteAddress remote address to connect to.
* @param localAddress local address to bind socket to.
* @param completionHandler {@link CompletionHandler}.
*/
@Override
public void connect(final SocketAddress remoteAddress,
final SocketAddress localAddress,
final CompletionHandler completionHandler) {
connectorHandler.connect(remoteAddress, localAddress,
completionHandler);
}
@Override
protected void closeConnection(final Connection connection) throws IOException {
final SelectableChannel nioChannel = ((NIOConnection) connection).getChannel();
if (nioChannel != null) {
try {
nioChannel.close();
} catch (IOException e) {
LOGGER.log(Level.FINE,
"TCPNIOTransport.closeChannel exception", e);
}
}
if (asyncQueueIO != null) {
final AsyncQueueReader reader = asyncQueueIO.getReader();
if (reader != null) {
reader.onClose(connection);
}
final AsyncQueueWriter writer = asyncQueueIO.getWriter();
if (writer != null) {
writer.onClose(connection);
}
}
}
TCPNIOConnection obtainNIOConnection(final SocketChannel channel) {
final TCPNIOConnection connection = new TCPNIOConnection(this, channel);
configureNIOConnection(connection);
return connection;
}
TCPNIOServerConnection obtainServerNIOConnection(final ServerSocketChannel channel) {
final TCPNIOServerConnection connection = new TCPNIOServerConnection(this, channel);
configureNIOConnection(connection);
return connection;
}
/**
* Configuring SocketChannel according the transport settings
* @param channel SocketChannel to configure
* @throws java.io.IOException
*/
void configureChannel(final SocketChannel channel) throws IOException {
final Socket socket = channel.socket();
channel.configureBlocking(false);
try {
if (linger >= 0) {
socket.setSoLinger(true, linger);
}
} catch (IOException e) {
LOGGER.log(Level.WARNING, "Can not set linger to " + linger, e);
}
try {
socket.setKeepAlive(isKeepAlive());
} catch (IOException e) {
LOGGER.log(Level.WARNING, "Can not set keepAlive to " + isKeepAlive(), e);
}
try {
socket.setTcpNoDelay(isTcpNoDelay());
} catch (IOException e) {
LOGGER.log(Level.WARNING, "Can not set TcpNoDelay to " + isTcpNoDelay(), e);
}
socket.setReuseAddress(isReuseAddress());
}
@Override
public AsyncQueueIO getAsyncQueueIO() {
return asyncQueueIO;
}
@Override
public synchronized void configureStandalone(final boolean isStandalone) {
if (this.isStandalone != isStandalone) {
this.isStandalone = isStandalone;
if (isStandalone) {
processor = StandaloneProcessor.INSTANCE;
processorSelector = StandaloneProcessorSelector.INSTANCE;
} else {
processor = null;
processorSelector = null;
}
}
}
public int getLinger() {
return linger;
}
public void setLinger(final int linger) {
this.linger = linger;
notifyProbesConfigChanged(this);
}
public boolean isKeepAlive() {
return isKeepAlive;
}
@SuppressWarnings({"UnusedDeclaration"})
public void setKeepAlive(final boolean isKeepAlive) {
this.isKeepAlive = isKeepAlive;
notifyProbesConfigChanged(this);
}
public boolean isTcpNoDelay() {
return tcpNoDelay;
}
public void setTcpNoDelay(final boolean tcpNoDelay) {
this.tcpNoDelay = tcpNoDelay;
notifyProbesConfigChanged(this);
}
/**
* Get the default server connection backlog size.
* @return the default server connection backlog size.
*/
public int getServerConnectionBackLog() {
return serverConnectionBackLog;
}
/**
* Set the default server connection backlog size.
* @param serverConnectionBackLog the default server connection backlog size.
*/
public void setServerConnectionBackLog(final int serverConnectionBackLog) {
this.serverConnectionBackLog = serverConnectionBackLog;
}
@Override
public Filter getTransportFilter() {
return defaultTransportFilter;
}
@Override
public TemporarySelectorIO getTemporarySelectorIO() {
return temporarySelectorIO;
}
@Override
public void fireIOEvent(final IOEvent ioEvent,
final Connection connection,
final IOEventLifeCycleListener listener) {
if (ioEvent == IOEvent.SERVER_ACCEPT) {
try {
((TCPNIOServerConnection) connection).onAccept();
} catch (IOException e) {
failProcessingHandler(ioEvent, connection,
listener, e);
}
return;
} else if (ioEvent == IOEvent.CLIENT_CONNECTED) {
try {
((TCPNIOConnection) connection).onConnect();
} catch (IOException e) {
failProcessingHandler(ioEvent, connection,
listener, e);
}
return;
}
ProcessorExecutor.execute(
Context.create(
connection,
connection.obtainProcessor(ioEvent),
ioEvent,
listener));
}
/**
* {@inheritDoc}
*/
@Override
public Reader getReader(final Connection connection) {
return getReader(connection.isBlocking());
}
/**
* {@inheritDoc}
*/
@Override
public Reader getReader(final boolean isBlocking) {
if (isBlocking) {
return getTemporarySelectorIO().getReader();
} else {
return getAsyncQueueIO().getReader();
}
}
/**
* {@inheritDoc}
*/
@Override
public Writer getWriter(final Connection connection) {
return getWriter(connection.isBlocking());
}
/**
* {@inheritDoc}
*/
@Override
public Writer getWriter(final boolean isBlocking) {
if (isBlocking) {
return getTemporarySelectorIO().getWriter();
} else {
return getAsyncQueueIO().getWriter();
}
}
public Buffer read(final Connection connection, Buffer buffer)
throws IOException {
final TCPNIOConnection tcpConnection = (TCPNIOConnection) connection;
int read;
final boolean isAllocate = (buffer == null);
if (isAllocate) {
try {
final int receiveBufferSize = connection.getReadBufferSize();
if (!memoryManager.willAllocateDirect(receiveBufferSize)) {
final DirectByteBufferRecord directByteBufferRecord =
DirectByteBufferRecord.allocate(receiveBufferSize);
try {
final ByteBuffer directByteBuffer = directByteBufferRecord.getByteBuffer();
read = readSimpleByteBuffer(tcpConnection,
directByteBuffer);
directByteBuffer.flip();
buffer = memoryManager.allocate(read);
buffer.put(directByteBuffer);
} finally {
directByteBufferRecord.release();
}
} else {
buffer = memoryManager.allocateAtLeast(receiveBufferSize);
read = readSimple(tcpConnection, buffer);
}
tcpConnection.onRead(buffer, read);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection (" + connection + ") (allocated) read exception", e);
}
read = -1;
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection ({0}) (allocated) read {1} bytes",
new Object[]{connection, read});
}
if (read > 0) {
assert buffer != null;
buffer.allowBufferDispose(true);
buffer.position(read);
} else {
if (buffer != null) {
buffer.dispose();
buffer = null;
}
if (read < 0) {
final IOException e = new EOFException();
// Mark connection as closed remotely.
tcpConnection.close0(null,
new CloseReason(CloseType.REMOTELY, e));
throw e;
}
}
} else {
if (buffer.hasRemaining()) {
final int oldPos = buffer.position();
final SocketChannel socketChannel =
(SocketChannel) tcpConnection.getChannel();
try {
if (buffer.isComposite()) {
final ByteBufferArray array = buffer.toByteBufferArray();
final ByteBuffer[] byteBuffers = array.getArray();
final int size = array.size();
//if (!isSelectorThread) {
// read = doReadInLoop(socketChannel, byteBuffers, 0, size);
//} else {
read = (int) socketChannel.read(byteBuffers, 0, size);
//}
array.restore();
array.recycle();
} else {
read = readSimple(tcpConnection, buffer);
}
} catch (Exception e) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection (" + connection + ") (existing) read exception", e);
}
read = -1;
}
if (read > 0) {
buffer.position(oldPos + read);
}
tcpConnection.onRead(buffer, read);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection ({0}) (nonallocated) read {1} bytes", new Object[] {connection, read});
}
if (read < 0) {
final IOException e = new EOFException();
// Mark connection as closed remotely.
tcpConnection.close0(null,
new CloseReason(CloseType.REMOTELY, e));
throw e;
}
}
}
return buffer;
}
private int readSimple(final TCPNIOConnection tcpConnection,
final Buffer buffer) throws IOException {
final SocketChannel socketChannel = (SocketChannel) tcpConnection.getChannel();
final int read;
//if (!isSelectorThread) {
// read = doReadInLoop(socketChannel, buffer.toByteBuffer());
//} else {
read = socketChannel.read(buffer.toByteBuffer());
//}
return read;
}
private int readSimpleByteBuffer(final TCPNIOConnection tcpConnection,
final ByteBuffer byteBuffer) throws IOException {
final SocketChannel socketChannel = (SocketChannel) tcpConnection.getChannel();
final int read;
//if (!isSelectorThread) {
// read = doReadInLoop(socketChannel, byteBuffer);
//} else {
read = socketChannel.read(byteBuffer);
//}
return read;
}
public int write(final TCPNIOConnection connection, final WritableMessage message)
throws IOException {
return write(connection, message, null);
}
@SuppressWarnings("unchecked")
public int write(final TCPNIOConnection connection, final WritableMessage message,
final WriteResult currentResult) throws IOException {
int written;
if (message instanceof Buffer) {
final Buffer buffer = (Buffer) message;
final int oldPos = buffer.position();
try {
if (buffer.isComposite()) {
final BufferArray array = buffer.toBufferArray();
written = writeGathered(connection, array);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection ({0}) (composite) write {1} bytes",
new Object[]{connection, written});
}
array.restore();
array.recycle();
} else {
written = writeSimple(connection, buffer);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "TCPNIOConnection ({0}) (plain) write {1} bytes",
new Object[]{connection, written});
}
}
final boolean hasWritten = (written >= 0);
if (hasWritten) {
buffer.position(oldPos + written);
}
connection.onWrite(buffer, written);
if (hasWritten) {
if (currentResult != null) {
currentResult.setMessage(message);
currentResult.setWrittenSize(currentResult.getWrittenSize()
+ written);
currentResult.setDstAddressHolder(
connection.peerSocketAddressHolder);
}
}
} catch (IOException e) {
// Mark connection as closed remotely.
connection.close0(null, new CloseReason(CloseType.REMOTELY, e));
throw e;
}
} else if (message instanceof FileTransfer) {
written = (int) ((FileTransfer) message).writeTo((SocketChannel)
connection.getChannel());
} else {
throw new IllegalStateException("Unhandled message type");
}
return written;
}
private static int writeSimple(final TCPNIOConnection tcpConnection,
final Buffer buffer) throws IOException {
final SocketChannel socketChannel = (SocketChannel) tcpConnection.getChannel();
if (!buffer.hasRemaining()) {
return 0;
}
return flushByteBuffer(socketChannel, buffer.toByteBuffer());
}
private static int writeGathered(final TCPNIOConnection tcpConnection,
final BufferArray bufferArray)
throws IOException {
final Buffer[] buffers = bufferArray.getArray();
final int length = bufferArray.size();
final SocketChannel socketChannel = (SocketChannel) tcpConnection.getChannel();
int written = 0;
DirectByteBufferRecord record = null;
ByteBuffer directByteBuffer = null;
try {
int next;
for (int i = findNextAvailBuffer(buffers, -1, length); i < length; i = next) {
final Buffer buffer = buffers[i];
next = findNextAvailBuffer(buffers, i, length);
final boolean isFlush = next == length || buffers[next].isDirect();
// If Buffer is not direct - copy it to the direct buffer and write
if (!buffer.isDirect()) {
if (record == null) {
record = DirectByteBufferRecord.allocate(tcpConnection.getWriteBufferSize());
directByteBuffer = record.getByteBuffer();
}
final int currentBufferRemaining = buffer.remaining();
final boolean isAdaptByteBuffer =
currentBufferRemaining < directByteBuffer.remaining();
if (isAdaptByteBuffer) {
directByteBuffer.limit(directByteBuffer.position() + currentBufferRemaining);
}
buffer.get(directByteBuffer);
if (isAdaptByteBuffer) {
directByteBuffer.limit(directByteBuffer.capacity());
}
if (!directByteBuffer.hasRemaining() || isFlush) {
directByteBuffer.flip();
written += flushByteBuffer(socketChannel, directByteBuffer);
int remaining = directByteBuffer.remaining();
if (remaining > 0) {
while (remaining > 0) {
final Buffer revertBuffer = buffers[i];
final int shift = Math.min(remaining,
revertBuffer.position() - bufferArray.getInitialPosition(i));
revertBuffer.position(revertBuffer.position() - shift);
i--;
remaining -= shift;
}
break;
}
directByteBuffer.clear();
if (buffer.hasRemaining()) {
// continue the same buffer
next = i;
}
}
} else { // if it's direct buffer
final ByteBuffer byteBuffer = buffer.toByteBuffer();
written += socketChannel.write(byteBuffer);
if (byteBuffer.hasRemaining()) {
break;
}
}
}
} finally {
if (record != null) {
directByteBuffer.clear();
record.release();
}
}
return written;
}
private static int findNextAvailBuffer(final Buffer[] buffers, final int start, final int end) {
for (int i = start + 1; i < end; i++) {
if (buffers[i].hasRemaining()) {
return i;
}
}
return end;
}
static int flushByteBuffer(final SocketChannel channel,
final ByteBuffer byteBuffer) throws IOException {
return channel.write(byteBuffer);
}
private static void failProcessingHandler(final IOEvent ioEvent,
final Connection connection,
final IOEventLifeCycleListener processingHandler,
final IOException e) {
if (processingHandler != null) {
try {
processingHandler.onError(Context.create(connection, null,
ioEvent, processingHandler), e);
} catch (IOException ignored) {
}
}
}
/**
* {@inheritDoc}
*/
@Override
protected Object createJmxManagementObject() {
return MonitoringUtils.loadJmxObject(
"org.glassfish.grizzly.nio.transport.jmx.TCPNIOTransport", this,
TCPNIOTransport.class);
}
class RegisterChannelCompletionHandler
extends EmptyCompletionHandler {
@Override
public void completed(final RegisterChannelResult result) {
final SelectionKey selectionKey = result.getSelectionKey();
final TCPNIOConnection connection =
(TCPNIOConnection) getSelectionKeyHandler().
getConnectionForKey(selectionKey);
if (connection != null) {
final SelectorRunner selectorRunner = result.getSelectorRunner();
connection.setSelectionKey(selectionKey);
connection.setSelectorRunner(selectorRunner);
}
}
}
/**
* Transport default {@link TCPNIOConnectorHandler}.
*/
class TransportConnectorHandler extends TCPNIOConnectorHandler {
public TransportConnectorHandler() {
super(TCPNIOTransport.this);
}
@Override
public Processor getProcessor() {
return TCPNIOTransport.this.getProcessor();
}
@Override
public ProcessorSelector getProcessorSelector() {
return TCPNIOTransport.this.getProcessorSelector();
}
}
}
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