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package org.glassfish.grizzly;
import java.net.Socket;
import org.glassfish.grizzly.asyncqueue.AsyncQueueEnabledTransport;
import org.glassfish.grizzly.asyncqueue.AsyncQueueReader;
import org.glassfish.grizzly.asyncqueue.AsyncQueueWriter;
import org.glassfish.grizzly.asyncqueue.MessageCloner;
import org.glassfish.grizzly.filterchain.FilterChain;
import org.glassfish.grizzly.nio.transport.DefaultStreamReader;
import org.glassfish.grizzly.nio.transport.DefaultStreamWriter;
import org.glassfish.grizzly.streams.StreamReader;
import org.glassfish.grizzly.streams.StreamWriter;
/**
* {@link Processor}, which is not interested in processing I/O events.
* {@link Connection} lifecycle should be managed explicitly,
* using read/write/accept/connect methods.
*
* This {@link Processor} could be set on {@link Connection} to avoid it from
* being processed by {@link FilterChain} or other {@link Processor}. In this
* case {@link Connection} could be used like regular Java {@link Socket}.
*
* @author Alexey Stashok
*/
@SuppressWarnings({"unchecked", "deprecation"})
public class StandaloneProcessor implements Processor {
public static final StandaloneProcessor INSTANCE = new StandaloneProcessor();
/**
* This method should never be called, because
* {@link StandaloneProcessor#isInterested(IOEvent)} returns false for any
* {@link IOEvent}.
*/
@Override
public ProcessorResult process(final Context context) {
final IOEvent iOEvent = context.getIoEvent();
if (iOEvent == IOEvent.READ) {
final Connection connection = context.getConnection();
final AsyncQueueReader reader =
((AsyncQueueEnabledTransport) connection.getTransport()).
getAsyncQueueIO().getReader();
return reader.processAsync(context).toProcessorResult();
} else if (iOEvent == IOEvent.WRITE) {
final Connection connection = context.getConnection();
final AsyncQueueWriter writer =
((AsyncQueueEnabledTransport) connection.getTransport()).
getAsyncQueueIO().getWriter();
return writer.processAsync(context).toProcessorResult();
}
throw new IllegalStateException("Unexpected IOEvent=" + iOEvent);
}
/**
* {@link StandaloneProcessor} is not interested in any {@link IOEvent}.
*/
@Override
public boolean isInterested(IOEvent ioEvent) {
return ioEvent == IOEvent.READ || ioEvent == IOEvent.WRITE;
}
/**
* Method does nothing.
*/
@Override
public void setInterested(IOEvent ioEvent, boolean isInterested) {
}
@Override
public Context obtainContext(final Connection connection) {
final Context context = Context.create(connection);
context.setProcessor(this);
return context;
}
/**
* Get the {@link Connection} {@link StreamReader}, to read data from the
* {@link Connection}.
*
* @return the {@link Connection} {@link StreamReader}, to read data from the
* {@link Connection}.
*/
public StreamReader getStreamReader(Connection connection) {
return new DefaultStreamReader(connection);
}
/**
* Get the {@link Connection} {@link StreamWriter}, to write data to the
* {@link Connection}.
*
* @return the {@link Connection} {@link StreamWriter}, to write data to the
* {@link Connection}.
*/
public StreamWriter getStreamWriter(Connection connection) {
return new DefaultStreamWriter(connection);
}
@Override
public void read(Connection connection,
CompletionHandler completionHandler) {
final Transport transport = connection.getTransport();
transport.getReader(connection).read(connection,
null, completionHandler);
}
@Override
public void write(final Connection connection, final Object dstAddress,
final Object message, final CompletionHandler completionHandler) {
write(connection, dstAddress, message, completionHandler,
(MessageCloner) null);
}
@Override
public void write(Connection connection, Object dstAddress,
Object message, CompletionHandler completionHandler,
MessageCloner messageCloner) {
final Transport transport = connection.getTransport();
transport.getWriter(connection).write(connection, dstAddress,
(Buffer) message, completionHandler, messageCloner);
}
@Override
@Deprecated
public void write(Connection connection, Object dstAddress,
Object message, CompletionHandler completionHandler,
org.glassfish.grizzly.asyncqueue.PushBackHandler pushBackHandler) {
final Transport transport = connection.getTransport();
transport.getWriter(connection).write(connection, dstAddress,
(Buffer) message, completionHandler, pushBackHandler);
}
}