org.xnio.conduits.BlockingStreamSourceConduit Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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;
}
}