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package org.xnio.conduits;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.concurrent.TimeUnit;
import org.xnio.XnioIoThread;
import org.xnio.XnioWorker;
import org.xnio.channels.StreamSinkChannel;

A stream source conduit which is always empty.
Author:David M. Lloyd
/** * A stream source conduit which is always empty. * * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a> */
public final class EmptyStreamSourceConduit implements StreamSourceConduit { private final XnioWorker worker; private final XnioIoThread readThread; private ReadReadyHandler readReadyHandler; private boolean shutdown; private boolean resumed;
Construct a new instance.
Params:
  • readThread – the read thread for this conduit
/** * Construct a new instance. * * @param readThread the read thread for this conduit */
public EmptyStreamSourceConduit(final XnioIoThread readThread) { this.worker = readThread.getWorker(); this.readThread = readThread; } public void setReadReadyHandler(final ReadReadyHandler handler) { readReadyHandler = handler; } public long transferTo(final long position, final long count, final FileChannel target) throws IOException { return 0; } public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException { resumed = false; return -1L; } public int read(final ByteBuffer dst) throws IOException { resumed = false; return -1; } public long read(final ByteBuffer[] dsts, final int offs, final int len) throws IOException { resumed = false; return -1L; } public boolean isReadShutdown() { return shutdown; } public void resumeReads() { resumed = true; readThread.execute(new Runnable() { public void run() { final ReadReadyHandler handler = readReadyHandler; if (handler != null) { handler.readReady(); } } }); } public void suspendReads() { resumed = false; } public void wakeupReads() { resumeReads(); } public boolean isReadResumed() { return resumed; } public void awaitReadable() throws IOException { // always ready } public void awaitReadable(final long time, final TimeUnit timeUnit) throws IOException { // always ready } public void terminateReads() throws IOException { if (! shutdown) { shutdown = true; readReadyHandler.terminated(); } } public XnioIoThread getReadThread() { return readThread; } public XnioWorker getWorker() { return worker; } }