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package org.glassfish.grizzly.nio.transport;
import org.glassfish.grizzly.AbstractBindingHandler;
import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.localization.LogMessages;
import org.glassfish.grizzly.utils.Exceptions;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.SocketAddress;
import java.nio.channels.DatagramChannel;
import java.util.concurrent.locks.Lock;
import java.util.logging.Level;
/**
* This class may be used to apply a custom {@link org.glassfish.grizzly.Processor} and/or {@link org.glassfish.grizzly.ProcessorSelector}
* atomically within a bind operation - not something that can normally be done using the {@link UDPNIOTransport} alone.
*
* Example usage:
* <pre>
* UDPNIOBindingHandler handler = UDPNIOBindingHandler.builder(transport).setProcessor(custom).build();
* handler.bind(socketAddress);
* </pre>
*
* @since 2.2.19
*/
public class UDPNIOBindingHandler extends AbstractBindingHandler {
private final UDPNIOTransport udpTransport;
// ------------------------------------------------------------ Constructors
public UDPNIOBindingHandler(UDPNIOTransport udpTransport) {
super(udpTransport);
this.udpTransport = udpTransport;
}
// ------------------------------- Methods from AbstractBindingHandler
@Override
public UDPNIOServerConnection bind(SocketAddress socketAddress) throws IOException {
return bind(socketAddress, -1);
}
@Override
public UDPNIOServerConnection bind(SocketAddress socketAddress, int backlog) throws IOException {
return bindToChannel(
udpTransport.getSelectorProvider().openDatagramChannel(),
socketAddress);
}
@Override
public UDPNIOServerConnection bindToInherited() throws IOException {
return bindToChannel(
this.<DatagramChannel>getSystemInheritedChannel(DatagramChannel.class),
null);
}
@Override
public void unbind(Connection connection) {
udpTransport.unbind(connection);
}
public static Builder builder(final UDPNIOTransport transport) {
return new UDPNIOBindingHandler.Builder().transport(transport);
}
// --------------------------------------------------------- Private Methods
private UDPNIOServerConnection bindToChannel(final DatagramChannel serverDatagramChannel,
final SocketAddress socketAddress)
throws IOException {
UDPNIOServerConnection serverConnection = null;
final Lock lock = udpTransport.getState().getStateLocker().writeLock();
lock.lock();
try {
final DatagramSocket socket = serverDatagramChannel.socket();
try {
socket.setReuseAddress(udpTransport.isReuseAddress());
} catch (IOException e) {
UDPNIOTransport.LOGGER.log(Level.WARNING,
LogMessages.WARNING_GRIZZLY_SOCKET_REUSEADDRESS_EXCEPTION(udpTransport.isReuseAddress()), e);
}
try {
socket.setSoTimeout(udpTransport.getServerSocketSoTimeout());
} catch (IOException e) {
UDPNIOTransport.LOGGER.log(Level.WARNING,
LogMessages.WARNING_GRIZZLY_SOCKET_TIMEOUT_EXCEPTION(udpTransport.getServerSocketSoTimeout()), e);
}
if (socketAddress != null) {
socket.bind(socketAddress);
}
serverDatagramChannel.configureBlocking(false);
serverConnection = udpTransport.obtainServerNIOConnection(serverDatagramChannel);
serverConnection.setProcessor(getProcessor());
serverConnection.setProcessorSelector(getProcessorSelector());
udpTransport.serverConnections.add(serverConnection);
if (!udpTransport.isStopped()) {
serverConnection.register();
}
return serverConnection;
} catch (Exception e) {
if (serverConnection != null) {
udpTransport.serverConnections.remove(serverConnection);
serverConnection.closeSilently();
} else {
try {
serverDatagramChannel.close();
} catch (IOException ignored) {
}
}
throw Exceptions.makeIOException(e);
} finally {
lock.unlock();
}
}
// ----------------------------------------------------------- Inner Classes
public static class Builder extends AbstractBindingHandler.Builder<Builder> {
private UDPNIOTransport transport;
public UDPNIOBindingHandler build() {
return (UDPNIOBindingHandler) super.build();
}
public Builder transport(UDPNIOTransport transport) {
this.transport = transport;
return this;
}
@Override
protected AbstractBindingHandler create() {
if (transport == null) {
throw new IllegalStateException(
"Unable to create TCPNIOBindingHandler - transport is null");
}
return new UDPNIOBindingHandler(transport);
}
} // END UDPNIOSocketBindingHandlerBuilder
}