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package org.glassfish.grizzly.nio.transport;
import java.io.IOException;
import java.net.SocketAddress;
import java.util.concurrent.ExecutionException;
import java.util.logging.Filter;
import org.glassfish.grizzly.*;
import org.glassfish.grizzly.asyncqueue.MessageCloner;
import org.glassfish.grizzly.asyncqueue.WritableMessage;
import org.glassfish.grizzly.filterchain.*;
import org.glassfish.grizzly.memory.Buffers;
/**
* The {@link TCPNIOTransport}'s transport {@link Filter} implementation
*
* @author Alexey Stashok
*/
public final class TCPNIOTransportFilter extends BaseFilter {
private final TCPNIOTransport transport;
TCPNIOTransportFilter(final TCPNIOTransport transport) {
this.transport = transport;
}
@Override
public NextAction handleRead(final FilterChainContext ctx)
throws IOException {
final TCPNIOConnection connection = (TCPNIOConnection) ctx.getConnection();
final boolean isBlocking = ctx.getTransportContext().isBlocking();
final Buffer inBuffer = ctx.getMessage();
final Buffer buffer;
if (!isBlocking) {
buffer = transport.read(connection, inBuffer);
} else {
GrizzlyFuture<ReadResult<Buffer, SocketAddress>> future =
transport.getTemporarySelectorIO().getReader().read(
connection, inBuffer);
try {
ReadResult<Buffer, SocketAddress> result = future.get();
buffer = result.getMessage();
future.recycle(true);
} catch (ExecutionException e) {
final Throwable cause = e.getCause();
if (cause instanceof IOException) {
throw (IOException) cause;
}
throw new IOException(cause);
} catch (InterruptedException e) {
throw new IOException(e);
}
}
if (buffer == null || buffer.position() == 0) {
return ctx.getStopAction();
} else {
buffer.trim();
ctx.setMessage(buffer);
ctx.setAddressHolder(connection.peerSocketAddressHolder);
}
return ctx.getInvokeAction();
}
@Override
@SuppressWarnings("unchecked")
public NextAction handleWrite(final FilterChainContext ctx)
throws IOException {
final WritableMessage message = ctx.getMessage();
if (message != null) {
ctx.setMessage(null);
final Connection connection = ctx.getConnection();
final FilterChainContext.TransportContext transportContext =
ctx.getTransportContext();
final CompletionHandler completionHandler = transportContext.getCompletionHandler();
final MessageCloner cloner = transportContext.getMessageCloner();
transportContext.setCompletionHandler(null);
transportContext.setMessageCloner(null);
if (!transportContext.isBlocking()) {
transport.getAsyncQueueIO().getWriter().write(connection, null,
message, completionHandler, cloner);
} else {
transport.getTemporarySelectorIO().getWriter().write(connection,
null, message, completionHandler);
}
}
return ctx.getInvokeAction();
}
@Override
@SuppressWarnings("unchecked")
public NextAction handleEvent(final FilterChainContext ctx,
final FilterChainEvent event) throws IOException {
if (event.type() == TransportFilter.FlushEvent.TYPE) {
final Connection connection = ctx.getConnection();
final FilterChainContext.TransportContext transportContext =
ctx.getTransportContext();
if (transportContext.getCompletionHandler() != null) {
throw new IllegalStateException("TransportContext CompletionHandler must be null");
}
final CompletionHandler completionHandler =
((TransportFilter.FlushEvent) event).getCompletionHandler();
transport.getWriter(transportContext.isBlocking()).write(connection,
Buffers.EMPTY_BUFFER, completionHandler);
}
return ctx.getInvokeAction();
}
@Override
public void exceptionOccurred(final FilterChainContext ctx,
final Throwable error) {
final Connection connection = ctx.getConnection();
if (connection != null) {
connection.closeSilently();
}
}
}