/**
* Copyright (C) 2009-2013 Barchart, Inc. <http://www.barchart.com/>
*
* All rights reserved. Licensed under the OSI BSD License.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
package com.barchart.udt.nio;
import java.io.IOException;
import java.nio.channels.DatagramChannel;
import java.nio.channels.Pipe;
import java.nio.channels.spi.SelectorProvider;
import com.barchart.udt.SocketUDT;
import com.barchart.udt.TypeUDT;
/**
* selection provider for UDT
* <p>
* note: you must use the same system-wide provider instance for the same
* {@link TypeUDT} of UDT channels and UDT selectors;
*/
public class SelectorProviderUDT extends SelectorProvider {
/**
* system-wide provider instance, for {@link TypeUDT#DATAGRAM} UDT sockets
*/
public static final SelectorProviderUDT DATAGRAM = //
new SelectorProviderUDT(TypeUDT.DATAGRAM);
/**
* system-wide provider instance, for {@link TypeUDT#STREAM} UDT sockets
*/
public static final SelectorProviderUDT STREAM = //
new SelectorProviderUDT(TypeUDT.STREAM);
public static SelectorProviderUDT from(final TypeUDT type) {
switch (type) {
case DATAGRAM:
return DATAGRAM;
case STREAM:
return STREAM;
default:
throw new IllegalStateException("wrong type=" + type);
}
}
private volatile int acceptQueueSize = SocketUDT.DEFAULT_ACCEPT_QUEUE_SIZE;
private volatile int maxSelectorSize = SocketUDT.DEFAULT_MAX_SELECTOR_SIZE;
private final TypeUDT type;
/**
* {@link TypeUDT} of UDT sockets generated by this provider
*/
public final TypeUDT type() {
return type;
}
protected SelectorProviderUDT(final TypeUDT type) {
this.type = type;
}
public int getAcceptQueueSize() {
return acceptQueueSize;
}
public int getMaxSelectorSize() {
return maxSelectorSize;
}
/**
* Not supported.
*/
@Override
public DatagramChannel openDatagramChannel() throws IOException {
throw new UnsupportedOperationException("feature not available");
}
/**
* Not supported.
*/
@Override
public Pipe openPipe() throws IOException {
throw new UnsupportedOperationException("feature not available");
}
/**
* Open UDT {@link KindUDT#RENDEZVOUS} socket channel.
*
* @see RendezvousChannelUDT
*/
public RendezvousChannelUDT openRendezvousChannel() throws IOException {
final SocketUDT socketUDT = new SocketUDT(type);
return new RendezvousChannelUDT(this, socketUDT);
}
/**
* Open UDT specific selector.
*
* @see SelectorUDT
*/
@Override
public SelectorUDT openSelector() throws IOException {
return new SelectorUDT(this, maxSelectorSize);
}
/**
* Open UDT {@link KindUDT#ACCEPTOR} socket channel.
*
* @see ServerSocketChannelUDT
*/
@Override
public ServerSocketChannelUDT openServerSocketChannel() throws IOException {
final SocketUDT serverSocketUDT = new SocketUDT(type);
return new ServerSocketChannelUDT(this, serverSocketUDT);
}
/**
* Open UDT {@link KindUDT#CONNECTOR} socket channel.
*
* @see SocketChannelUDT
*/
@Override
public SocketChannelUDT openSocketChannel() throws IOException {
final SocketUDT socketUDT = new SocketUDT(type);
return new SocketChannelUDT(this, socketUDT);
}
public void setAcceptQueueSize(final int queueSize) {
acceptQueueSize = queueSize;
}
public void setMaxSelectorSize(final int selectorSize) {
maxSelectorSize = selectorSize;
}
}