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package org.glassfish.grizzly.nio.transport;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.SocketAddress;
import java.nio.channels.DatagramChannel;
import java.util.concurrent.*;
import java.util.logging.Logger;
import org.glassfish.grizzly.*;
import org.glassfish.grizzly.impl.FutureImpl;
import org.glassfish.grizzly.impl.ReadyFutureImpl;
import org.glassfish.grizzly.nio.NIOChannelDistributor;
import org.glassfish.grizzly.nio.NIOConnection;
import org.glassfish.grizzly.nio.RegisterChannelResult;
import org.glassfish.grizzly.utils.Futures;
/**
* UDP NIO transport client side ConnectorHandler implementation
*
* @author Alexey Stashok
*/
public class UDPNIOConnectorHandler extends AbstractSocketConnectorHandler {
private static final Logger LOGGER = Grizzly.logger(UDPNIOConnectorHandler.class);
protected boolean isReuseAddress;
protected volatile long connectionTimeoutMillis = DEFAULT_CONNECTION_TIMEOUT;
protected UDPNIOConnectorHandler(UDPNIOTransport transport) {
super(transport);
connectionTimeoutMillis = transport.getConnectionTimeout();
isReuseAddress = transport.isReuseAddress();
}
/**
* Creates non-connected UDP {@link Connection}.
*
* @return non-connected UDP {@link Connection}.
*/
public GrizzlyFuture<Connection> connect() {
return connectAsync(null, null, null, true);
}
@Override
public void connect(final SocketAddress remoteAddress,
final SocketAddress localAddress,
final CompletionHandler<Connection> completionHandler) {
if (!transport.isBlocking()) {
connectAsync(remoteAddress, localAddress, completionHandler, false);
} else {
connectSync(remoteAddress, localAddress, completionHandler);
}
}
protected void connectSync(final SocketAddress remoteAddress,
final SocketAddress localAddress,
final CompletionHandler<Connection> completionHandler) {
final FutureImpl<Connection> future = connectAsync(remoteAddress,
localAddress, completionHandler, true);
waitNIOFuture(future, completionHandler);
}
@Override
protected FutureImpl<Connection> connectAsync(
final SocketAddress remoteAddress,
final SocketAddress localAddress,
final CompletionHandler<Connection> completionHandler,
final boolean needFuture) {
final UDPNIOTransport nioTransport = (UDPNIOTransport) transport;
UDPNIOConnection newConnection = null;
try {
final DatagramChannel datagramChannel =
nioTransport.getSelectorProvider().openDatagramChannel();
final DatagramSocket socket = datagramChannel.socket();
newConnection = nioTransport.obtainNIOConnection(datagramChannel);
socket.setReuseAddress(isReuseAddress);
socket.bind(localAddress);
datagramChannel.configureBlocking(false);
if (remoteAddress != null) {
datagramChannel.connect(remoteAddress);
}
preConfigure(newConnection);
newConnection.setProcessor(getProcessor());
newConnection.setProcessorSelector(getProcessorSelector());
final NIOChannelDistributor nioChannelDistributor =
nioTransport.getNIOChannelDistributor();
if (nioChannelDistributor == null) {
throw new IllegalStateException(
"NIOChannelDistributor is null. Is Transport running?");
}
final CompletionHandler<Connection> completionHandlerToPass;
final FutureImpl<Connection> futureToReturn;
if (needFuture) {
futureToReturn = makeCancellableFuture(newConnection);
completionHandlerToPass = Futures.toCompletionHandler(
futureToReturn, completionHandler);
} else {
completionHandlerToPass = completionHandler;
futureToReturn = null;
}
// if connected immediately - register channel on selector with NO_INTEREST
// interest
nioChannelDistributor.registerChannelAsync(datagramChannel,
0, newConnection,
new ConnectHandler(newConnection, completionHandlerToPass));
return futureToReturn;
} catch (Exception e) {
if (newConnection != null) {
newConnection.closeSilently();
}
if (completionHandler != null) {
completionHandler.failed(e);
}
return needFuture ? ReadyFutureImpl.<Connection>create(e) : null;
}
}
public boolean isReuseAddress() {
return isReuseAddress;
}
public void setReuseAddress(boolean isReuseAddress) {
this.isReuseAddress = isReuseAddress;
}
public long getSyncConnectTimeout(final TimeUnit timeUnit) {
return timeUnit.convert(connectionTimeoutMillis, TimeUnit.MILLISECONDS);
}
public void setSyncConnectTimeout(final long timeout, final TimeUnit timeUnit) {
this.connectionTimeoutMillis = TimeUnit.MILLISECONDS.convert(timeout, timeUnit);
}
protected void waitNIOFuture(final FutureImpl<Connection> future,
final CompletionHandler<Connection> completionHandler) {
try {
future.get(connectionTimeoutMillis, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
Futures.notifyFailure(future, completionHandler, e);
} catch (TimeoutException e) {
Futures.notifyFailure(future, completionHandler,
new IOException("Channel registration on Selector timeout!"));
} catch (Exception ingored) {
}
}
private static void abortConnection(final UDPNIOConnection connection,
final CompletionHandler<Connection> completionHandler,
final Throwable failure) {
connection.closeSilently();
if (completionHandler != null) {
completionHandler.failed(failure);
}
}
private final class ConnectHandler extends EmptyCompletionHandler<RegisterChannelResult> {
private final UDPNIOConnection connection;
private final CompletionHandler<Connection> completionHandler;
private ConnectHandler(final UDPNIOConnection connection,
final CompletionHandler<Connection> completionHandler) {
this.connection = connection;
this.completionHandler = completionHandler;
}
@Override
public void completed(RegisterChannelResult result) {
final UDPNIOTransport transport =
(UDPNIOTransport) UDPNIOConnectorHandler.this.transport;
transport.registerChannelCompletionHandler.completed(result);
try {
connection.onConnect();
} catch (Exception e) {
abortConnection(connection, completionHandler, e);
// LOGGER.log(Level.FINE, "Exception happened, when "
// + "trying to connect the channel", e);
}
if (connection.notifyReady()) {
transport.fireIOEvent(IOEvent.CONNECTED, connection,
new EnableReadHandler(completionHandler));
}
}
@Override
public void failed(final Throwable throwable) {
abortConnection(connection, completionHandler, throwable);
}
}
// COMPLETE, COMPLETE_LEAVE, REREGISTER, RERUN, ERROR, TERMINATE, NOT_RUN
// private final static boolean[] isRegisterMap = {true, false, true, false, false, false, true};
// PostProcessor, which supposed to enable OP_READ interest, once Processor will be notified
// about Connection CONNECT
private static class EnableReadHandler extends IOEventLifeCycleListener.Adapter {
private final CompletionHandler<Connection> completionHandler;
private EnableReadHandler(
final CompletionHandler<Connection> completionHandler) {
this.completionHandler = completionHandler;
}
@Override
public void onReregister(final Context context) throws IOException {
onComplete(context, null);
}
@Override
public void onNotRun(final Context context) throws IOException {
onComplete(context, null);
}
@Override
public void onComplete(final Context context, final Object data)
throws IOException {
final NIOConnection connection = (NIOConnection) context.getConnection();
if (completionHandler != null) {
completionHandler.completed(connection);
}
if (!connection.isStandalone()) {
connection.enableIOEvent(IOEvent.READ);
}
}
@Override
public void onError(final Context context, final Object description)
throws IOException {
context.getConnection().closeSilently();
}
}
/**
* Return the {@link UDPNIOConnectorHandler} builder.
*
* @param transport {@link UDPNIOTransport}.
* @return the {@link UDPNIOConnectorHandler} builder.
*/
public static Builder builder(final UDPNIOTransport transport) {
return new UDPNIOConnectorHandler.Builder().setTransport(transport);
}
public static class Builder extends AbstractSocketConnectorHandler.Builder<Builder> {
private UDPNIOTransport transport;
private Boolean reuseAddress;
private Long timeout;
private TimeUnit timeoutTimeunit;
public UDPNIOConnectorHandler build() {
UDPNIOConnectorHandler handler =
(UDPNIOConnectorHandler) super.build();
if (reuseAddress != null) {
handler.setReuseAddress(reuseAddress);
}
if (timeout != null) {
handler.setSyncConnectTimeout(timeout, timeoutTimeunit);
}
return handler;
}
public Builder setTransport(final UDPNIOTransport transport) {
this.transport = transport;
return this;
}
public Builder setReuseAddress(final boolean reuseAddress) {
this.reuseAddress = reuseAddress;
return this;
}
public Builder setSyncConnectTimeout(final long timeout, final TimeUnit timeunit) {
this.timeout = timeout;
timeoutTimeunit = timeunit;
return this;
}
@Override
protected AbstractSocketConnectorHandler create() {
if (transport == null) {
throw new IllegalStateException(
"Unable to create UDPNIOConnectorHandler - transport is null");
}
return new UDPNIOConnectorHandler(transport);
}
}
}