org.hornetq.tests.integration.transports.netty.HornetQFrameDecoder2Test.java Source code

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Here is the source code for org.hornetq.tests.integration.transports.netty.HornetQFrameDecoder2Test.java

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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat 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 org.hornetq.tests.integration.transports.netty;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import org.hornetq.core.remoting.impl.netty.HornetQFrameDecoder2;
import org.hornetq.tests.util.UnitTestCase;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

/**
 * A HornetQFrameDecoder2Test
 *
 * @author <a href="tlee@redhat.com">Trustin Lee</a>
 * @version $Revision$, $Date$
 */
public class HornetQFrameDecoder2Test extends UnitTestCase {
    private static final int MSG_CNT = 10000;

    private static final int MSG_LEN = 1000;

    private static final int FRAGMENT_MAX_LEN = 1500;

    private static final Random rand = new Random();

    @Before
    public void setUp() throws Exception {
        super.setUp();
    }

    @After
    public void tearDown() throws Exception {
        super.tearDown();
    }

    @Test
    public void testOrdinaryFragmentation() throws Exception {
        final EmbeddedChannel decoder = new EmbeddedChannel(new HornetQFrameDecoder2());
        final byte[] data = new byte[HornetQFrameDecoder2Test.MSG_LEN];
        HornetQFrameDecoder2Test.rand.nextBytes(data);

        ByteBuf src = Unpooled.buffer(HornetQFrameDecoder2Test.MSG_CNT * (HornetQFrameDecoder2Test.MSG_LEN + 4));
        while (src.writerIndex() < src.capacity()) {
            src.writeInt(HornetQFrameDecoder2Test.MSG_LEN);
            src.writeBytes(data);
        }

        List<ByteBuf> packets = new ArrayList<ByteBuf>();
        while (src.isReadable()) {
            int length = Math.min(HornetQFrameDecoder2Test.rand.nextInt(HornetQFrameDecoder2Test.FRAGMENT_MAX_LEN),
                    src.readableBytes());
            packets.add(src.readBytes(length));
        }

        int cnt = 0;
        for (ByteBuf p : packets) {
            decoder.writeInbound(p);
            for (;;) {
                ByteBuf frame = (ByteBuf) decoder.readInbound();
                if (frame == null) {
                    break;
                }
                Assert.assertEquals(4, frame.readerIndex());
                Assert.assertEquals(HornetQFrameDecoder2Test.MSG_LEN, frame.readableBytes());
                Assert.assertEquals(Unpooled.wrappedBuffer(data), frame);
                cnt++;
                frame.release();
            }
        }
        Assert.assertEquals(HornetQFrameDecoder2Test.MSG_CNT, cnt);
    }

    @Test
    public void testExtremeFragmentation() throws Exception {
        final EmbeddedChannel decoder = new EmbeddedChannel(new HornetQFrameDecoder2());

        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 0 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 0 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 0 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 4 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 5 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 6 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 7 }));
        Assert.assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[] { 8 }));

        ByteBuf frame = (ByteBuf) decoder.readInbound();
        Assert.assertEquals(4, frame.readerIndex());
        Assert.assertEquals(4, frame.readableBytes());
        Assert.assertEquals(5, frame.getByte(4));
        Assert.assertEquals(6, frame.getByte(5));
        Assert.assertEquals(7, frame.getByte(6));
        Assert.assertEquals(8, frame.getByte(7));
        frame.release();
    }
}