org.glassfish.grizzly.nio.transport.UDPNIOTransportFilter Maven / Gradle / Ivy
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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.Buffer;
import org.glassfish.grizzly.CompletionHandler;
import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.GrizzlyFuture;
import org.glassfish.grizzly.ReadResult;
import org.glassfish.grizzly.asyncqueue.WritableMessage;
import org.glassfish.grizzly.filterchain.BaseFilter;
import org.glassfish.grizzly.filterchain.FilterChainContext;
import org.glassfish.grizzly.filterchain.FilterChainEvent;
import org.glassfish.grizzly.filterchain.NextAction;
import org.glassfish.grizzly.filterchain.TransportFilter;
import org.glassfish.grizzly.memory.Buffers;
import org.glassfish.grizzly.utils.Holder;
/**
* The {@link UDPNIOTransport}'s transport {@link Filter} implementation
*
* @author Alexey Stashok
*/
@SuppressWarnings("unchecked")
public final class UDPNIOTransportFilter extends BaseFilter {
private final UDPNIOTransport transport;
UDPNIOTransportFilter(final UDPNIOTransport transport) {
this.transport = transport;
}
@Override
public NextAction handleRead(final FilterChainContext ctx)
throws IOException {
final UDPNIOConnection connection = (UDPNIOConnection) ctx.getConnection();
final boolean isBlocking = ctx.getTransportContext().isBlocking();
final Buffer inBuffer = ctx.getMessage();
final ReadResult readResult;
if (!isBlocking) {
readResult = ReadResult.create(connection);
transport.read(connection, inBuffer, readResult);
} else {
GrizzlyFuture> future =
transport.getTemporarySelectorIO().getReader().read(
connection, inBuffer);
try {
readResult = future.get();
future.recycle(false);
} 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 (readResult.getReadSize() > 0) {
final Buffer buffer = readResult.getMessage();
buffer.trim();
final Holder addressHolder =
readResult.getSrcAddressHolder();
readResult.recycle();
ctx.setMessage(buffer);
ctx.setAddressHolder(addressHolder);
// if (!connection.isConnected()) {
// connection.enableIOEvent(IOEvent.READ);
// }
} else {
readResult.recycle();
return ctx.getStopAction();
}
return ctx.getInvokeAction();
}
@Override
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 Object address = ctx.getAddress();
transportContext.setCompletionHandler(null);
transport.getWriter(transportContext.isBlocking()).write(
connection, address,
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);
transportContext.setCompletionHandler(null);
}
return ctx.getInvokeAction();
}
@Override
public void exceptionOccurred(final FilterChainContext ctx,
final Throwable error) {
final Connection connection = ctx.getConnection();
if (connection != null) {
connection.closeSilently();
}
}
}