/*
 * 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.
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package io.undertow.conduits;

import java.io.IOException;
import java.nio.ByteBuffer;

import org.xnio.Buffers;
import org.xnio.conduits.AbstractStreamSinkConduit;
import org.xnio.conduits.StreamSinkConduit;

Author:David M. Lloyd
/** * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a> */
public final class FinishableStreamSinkConduit extends AbstractStreamSinkConduit<StreamSinkConduit> { private final ConduitListener<? super FinishableStreamSinkConduit> finishListener; //0 = open //1 = writes shutdown //2 = finish listener invoked private int shutdownState = 0; public FinishableStreamSinkConduit(final StreamSinkConduit delegate, final ConduitListener<? super FinishableStreamSinkConduit> finishListener) { super(delegate); this.finishListener = finishListener; } @Override public int writeFinal(ByteBuffer src) throws IOException { int res = next.writeFinal(src); if(!src.hasRemaining()) { if (shutdownState == 0) { shutdownState = 1; } } return res; } @Override public long writeFinal(ByteBuffer[] srcs, int offset, int length) throws IOException { long res = next.writeFinal(srcs, offset, length); if(!Buffers.hasRemaining(srcs, offset, length)) { if (shutdownState == 0) { shutdownState = 1; } } return res; } public void terminateWrites() throws IOException { super.terminateWrites(); if (shutdownState == 0) { shutdownState = 1; } } @Override public void truncateWrites() throws IOException { next.truncateWrites(); if (shutdownState != 2) { shutdownState = 2; finishListener.handleEvent(this); } } public boolean flush() throws IOException { final boolean val = next.flush(); if (val && shutdownState == 1) { shutdownState = 2; finishListener.handleEvent(this); } return val; } }