org.xnio.conduits.BlockingStreamSourceConduit Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source
*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xnio.conduits;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.xnio.channels.StreamSinkChannel;
/**
* A stream source conduit which can switch into and out of blocking mode.
*
* @author David M. Lloyd
*/
public final class BlockingStreamSourceConduit extends AbstractStreamSourceConduit {
private boolean resumed;
/**
* Construct a new instance.
*
* @param next the delegate conduit to set
*/
public BlockingStreamSourceConduit(final StreamSourceConduit next) {
super(next);
}
public long transferTo(final long position, final long count, final FileChannel target) throws IOException {
if (resumed) return next.transferTo(position, count, target);
long res;
while ((res = next.transferTo(position, count, target)) == 0L) {
next.awaitReadable();
}
return res;
}
public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException {
if (resumed) return next.transferTo(count, throughBuffer, target);
long res;
while ((res = next.transferTo(count, throughBuffer, target)) == 0L && ! throughBuffer.hasRemaining()) {
next.awaitReadable();
}
return res;
}
public int read(final ByteBuffer dst) throws IOException {
if (resumed) return next.read(dst);
int res;
while ((res = next.read(dst)) == 0) {
next.awaitReadable();
}
return res;
}
public long read(final ByteBuffer[] dsts, final int offs, final int len) throws IOException {
if (resumed) return next.read(dsts, offs, len);
long res;
while ((res = next.read(dsts, offs, len)) == 0L) {
next.awaitReadable();
}
return res;
}
public void resumeReads() {
resumed = true;
next.resumeReads();
}
public void wakeupReads() {
resumed = true;
next.wakeupReads();
}
public void suspendReads() {
resumed = false;
next.suspendReads();
}
public boolean isReadResumed() {
return resumed;
}
}