/* * JBoss, Home of Professional Open Source. * Copyright 2014 Red Hat, Inc., and individual contributors * as indicated by the @author tags. * * 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 io.undertow.conduits; import org.xnio.channels.StreamSinkChannel; import org.xnio.conduits.AbstractStreamSourceConduit; import org.xnio.conduits.StreamSourceConduit; import java.io.IOException; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; /** * A conduit that calls a finish listener when there is no data left in the underlying conduit. * * @author Stuart Douglas */ public final class FinishableStreamSourceConduit extends AbstractStreamSourceConduit<StreamSourceConduit> { private final ConduitListener<? super FinishableStreamSourceConduit> finishListener; private boolean finishCalled = false; public FinishableStreamSourceConduit(final StreamSourceConduit next, final ConduitListener<? super FinishableStreamSourceConduit> finishListener) { super(next); this.finishListener = finishListener; } public long transferTo(final long position, final long count, final FileChannel target) throws IOException { long res = 0; try { return res = next.transferTo(position, count, target); } finally { exitRead(res); } } public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException { long res = 0; try { return res = next.transferTo(count, throughBuffer, target); } finally { exitRead(res); } } public long read(final ByteBuffer[] dsts, final int offset, final int length) throws IOException { long res = 0; try { return res = next.read(dsts, offset, length); } finally { exitRead(res); } } public int read(final ByteBuffer dst) throws IOException { int res = 0; try { return res = next.read(dst); } finally { exitRead(res); } } /** * Exit a read method. * * @param consumed the number of bytes consumed by this call (may be 0) */ private void exitRead(long consumed) { if (consumed == -1) { if (!finishCalled) { finishCalled = true; finishListener.handleEvent(this); } } } }