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Java example source code file (ChunkedWriteHandlerTest.java)

This example Java source code file (ChunkedWriteHandlerTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bytearrayinputstream, bytebuf, chunkedfile, chunkedinput, chunkedniofile, chunkedstream, chunkedwritehandler, deprecated, embeddedchannel, exception, ioexception, object, override, test

The ChunkedWriteHandlerTest.java Java example source code

/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you 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.netty.handler.stream;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.CharsetUtil;
import org.junit.Test;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.Channels;
import java.util.concurrent.atomic.AtomicBoolean;

import static io.netty.util.ReferenceCountUtil.releaseLater;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

public class ChunkedWriteHandlerTest {
    private static final byte[] BYTES = new byte[1024 * 64];
    private static final File TMP;

    static {
        for (int i = 0; i < BYTES.length; i++) {
            BYTES[i] = (byte) i;
        }

        FileOutputStream out = null;
        try {
            TMP = File.createTempFile("netty-chunk-", ".tmp");
            TMP.deleteOnExit();
            out = new FileOutputStream(TMP);
            out.write(BYTES);
            out.flush();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    // ignore
                }
            }
        }
    }

    // See #310
    @Test
    public void testChunkedStream() {
        check(new ChunkedStream(new ByteArrayInputStream(BYTES)));

        check(new ChunkedStream(new ByteArrayInputStream(BYTES)),
                new ChunkedStream(new ByteArrayInputStream(BYTES)),
                new ChunkedStream(new ByteArrayInputStream(BYTES)));
    }

    @Test
    public void testChunkedNioStream() {
        check(new ChunkedNioStream(Channels.newChannel(new ByteArrayInputStream(BYTES))));

        check(new ChunkedNioStream(Channels.newChannel(new ByteArrayInputStream(BYTES))),
                new ChunkedNioStream(Channels.newChannel(new ByteArrayInputStream(BYTES))),
                new ChunkedNioStream(Channels.newChannel(new ByteArrayInputStream(BYTES))));
    }

    @Test
    public void testChunkedFile() throws IOException {
        check(new ChunkedFile(TMP));

        check(new ChunkedFile(TMP), new ChunkedFile(TMP), new ChunkedFile(TMP));
    }

    @Test
    public void testChunkedNioFile() throws IOException {
        check(new ChunkedNioFile(TMP));

        check(new ChunkedNioFile(TMP), new ChunkedNioFile(TMP), new ChunkedNioFile(TMP));
    }

    // Test case which shows that there is not a bug like stated here:
    // http://stackoverflow.com/a/10426305
    @Test
    public void testListenerNotifiedWhenIsEnd() {
        ByteBuf buffer = Unpooled.copiedBuffer("Test", CharsetUtil.ISO_8859_1);

        ChunkedInput<ByteBuf> input = new ChunkedInput() {
            private boolean done;
            private final ByteBuf buffer = releaseLater(Unpooled.copiedBuffer("Test", CharsetUtil.ISO_8859_1));

            @Override
            public boolean isEndOfInput() throws Exception {
                return done;
            }

            @Override
            public void close() throws Exception {
                // NOOP
            }

            @Deprecated
            @Override
            public ByteBuf readChunk(ChannelHandlerContext ctx) throws Exception {
                return readChunk(ctx.alloc());
            }

            @Override
            public ByteBuf readChunk(ByteBufAllocator allocator) throws Exception {
                if (done) {
                    return null;
                }
                done = true;
                return buffer.retainedDuplicate();
            }

            @Override
            public long length() {
                return -1;
            }

            @Override
            public long progress() {
                return 1;
            }
        };

        final AtomicBoolean listenerNotified = new AtomicBoolean(false);
        final ChannelFutureListener listener = new ChannelFutureListener() {

            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                listenerNotified.set(true);
            }
        };

        EmbeddedChannel ch = new EmbeddedChannel(new ChunkedWriteHandler());
        ch.writeAndFlush(input).addListener(listener).syncUninterruptibly();
        ch.checkException();
        ch.finish();

        // the listener should have been notified
        assertTrue(listenerNotified.get());

        assertEquals(releaseLater(buffer), releaseLater(ch.readOutbound()));
        assertNull(ch.readOutbound());
    }

    @Test
    public void testChunkedMessageInput() {

        ChunkedInput<Object> input = new ChunkedInput() {
            private boolean done;

            @Override
            public boolean isEndOfInput() throws Exception {
                return done;
            }

            @Override
            public void close() throws Exception {
                // NOOP
            }

            @Deprecated
            @Override
            public Object readChunk(ChannelHandlerContext ctx) throws Exception {
                return readChunk(ctx.alloc());
            }

            @Override
            public Object readChunk(ByteBufAllocator ctx) throws Exception {
                if (done) {
                    return false;
                }
                done = true;
                return 0;
            }

            @Override
            public long length() {
                return -1;
            }

            @Override
            public long progress() {
                return 1;
            }
        };

        EmbeddedChannel ch = new EmbeddedChannel(new ChunkedWriteHandler());
        ch.writeAndFlush(input).syncUninterruptibly();
        ch.checkException();
        assertTrue(ch.finish());

        assertEquals(0, ch.readOutbound());
        assertNull(ch.readOutbound());
    }

    private static void check(ChunkedInput<?>... inputs) {
        EmbeddedChannel ch = new EmbeddedChannel(new ChunkedWriteHandler());

        for (ChunkedInput<?> input: inputs) {
            ch.writeOutbound(input);
        }

        assertTrue(ch.finish());

        int i = 0;
        int read = 0;
        for (;;) {
            ByteBuf buffer = ch.readOutbound();
            if (buffer == null) {
                break;
            }
            while (buffer.isReadable()) {
                assertEquals(BYTES[i++], buffer.readByte());
                read++;
                if (i == BYTES.length) {
                    i = 0;
                }
            }
            buffer.release();
        }

        assertEquals(BYTES.length * inputs.length, read);
    }
}

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