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package com.sun.grizzly.nio.transport;
import java.io.EOFException;
import java.io.IOException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import com.sun.grizzly.Buffer;
import com.sun.grizzly.CompletionHandler;
import com.sun.grizzly.Connection;
import com.sun.grizzly.Interceptor;
import com.sun.grizzly.ReadResult;
import com.sun.grizzly.Reader;
import com.sun.grizzly.impl.FutureImpl;
import com.sun.grizzly.impl.ReadyFutureImpl;
import com.sun.grizzly.nio.tmpselectors.TemporarySelectorReader;
import com.sun.grizzly.streams.AbstractStreamReader;
import com.sun.grizzly.streams.StreamReader;
import com.sun.grizzly.utils.conditions.Condition;
/**
*
* @author oleksiys
*/
public class TCPNIOStreamReader extends AbstractStreamReader {
public TCPNIOStreamReader(TCPNIOConnection connection) {
super(connection);
}
public Future notifyCondition(Condition condition,
CompletionHandler completionHandler) {
if (notifyObject != null) {
throw new IllegalStateException("Only one available listener allowed!");
}
if (isClosed()) {
EOFException exception = new EOFException();
if (completionHandler != null) {
completionHandler.failed(getConnection(), exception);
}
return new ReadyFutureImpl(exception);
}
final int availableDataSize = availableDataSize();
if (condition.check(this)) {
if (completionHandler != null) {
completionHandler.completed(getConnection(), availableDataSize);
}
return new ReadyFutureImpl(availableDataSize);
} else {
if (isBlocking()) {
return notifyConditionBlocking(condition, completionHandler);
} else {
return notifyConditionNonBlocking(condition, completionHandler);
}
}
}
private Future notifyConditionNonBlocking(
final Condition condition,
CompletionHandler completionHandler) {
final FutureImpl future = new FutureImpl(sync);
synchronized (sync) {
try {
notifyObject = new NotifyObject(future, completionHandler, condition);
Connection connection = getConnection();
TCPNIOTransport transport = (TCPNIOTransport) connection.getTransport();
transport.getAsyncQueueIO().getReader().read(connection, null, null,
new Interceptor() {
public int intercept(int event, Object context, Object result) {
if (event == Reader.READ_EVENT) {
final ReadResult readResult = (ReadResult) result;
final Buffer buffer = (Buffer) readResult.getMessage();
readResult.setMessage(null);
if (buffer == null) {
return Interceptor.INCOMPLETED;
}
buffer.flip();
append(buffer);
if (future.isDone()) {
return Interceptor.COMPLETED;
}
return Interceptor.INCOMPLETED |
Interceptor.RESET;
}
return Interceptor.DEFAULT;
}
});
} catch (IOException e) {
future.failure(e);
}
}
return future;
}
private Future notifyConditionBlocking(
Condition condition,
CompletionHandler completionHandler) {
FutureImpl future = new FutureImpl();
notifyObject = new NotifyObject(future, completionHandler, condition);
try {
while (!future.isDone()) {
final Buffer buffer = read0();
append(buffer);
}
} catch (Exception e) {
future.failure(e);
}
return future;
}
@Override
protected Buffer read0() throws IOException {
final Connection connection = getConnection();
if (isBlocking()) {
TCPNIOTransport transport = (TCPNIOTransport) connection.getTransport();
Buffer buffer = newBuffer(bufferSize);
try {
TemporarySelectorReader reader =
(TemporarySelectorReader)
transport.getTemporarySelectorIO().getReader();
Future future = reader.read(connection, buffer, null, null,
timeoutMillis, TimeUnit.MILLISECONDS);
future.get();
buffer.trim();
} catch (Exception e) {
buffer.dispose();
throw new EOFException();
}
return buffer;
} else {
TCPNIOTransport transport = (TCPNIOTransport) connection.getTransport();
Buffer buffer = newBuffer(bufferSize);
try {
int readBytes = transport.read(connection, buffer);
if (readBytes <= 0) {
if (readBytes == -1) {
throw new EOFException();
}
buffer.dispose();
buffer = null;
} else {
buffer.trim();
}
} catch (IOException e) {
buffer.dispose();
buffer = null;
throw e;
}
return buffer;
}
}
@Override
protected final Object wrap(Buffer buffer) {
return buffer;
}
@Override
protected final Buffer unwrap(Object data) {
return (Buffer) data;
}
}
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