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Java example source code file (SocketGatheringWriteTest.java)

This example Java source code file (SocketGatheringWriteTest.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

afterclass, atomicreference, bootstrap, bytebuf, channel, compositebytebuf, exception, ioexception, override, random, test, testhandler, throwable, timeout, util

The SocketGatheringWriteTest.java Java example source code

/*
 * Copyright 2013 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.testsuite.transport.socket;

import io.netty.bootstrap.Bootstrap;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.CompositeByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOption;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.testsuite.util.TestUtils;
import io.netty.util.internal.StringUtil;
import org.junit.AfterClass;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.Timeout;

import java.io.IOException;
import java.util.Random;
import java.util.concurrent.atomic.AtomicReference;

import static org.junit.Assert.*;

public class SocketGatheringWriteTest extends AbstractSocketTest {

    @Rule
    public final Timeout globalTimeout = new Timeout(60000);

    private static final Random random = new Random();
    static final byte[] data = new byte[1048576];

    static {
        random.nextBytes(data);
    }

    @AfterClass
    public static void compressHeapDumps() throws Exception {
        TestUtils.compressHeapDumps();
    }

    @Test
    public void testGatheringWrite() throws Throwable {
        run();
    }

    public void testGatheringWrite(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testGatheringWrite0(sb, cb, data, false, true);
    }

    @Test
    public void testGatheringWriteNotAutoRead() throws Throwable {
        run();
    }

    public void testGatheringWriteNotAutoRead(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testGatheringWrite0(sb, cb, data, false, false);
    }

    @Test
    public void testGatheringWriteWithComposite() throws Throwable {
        run();
    }

    public void testGatheringWriteWithCompositeNotAutoRead(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testGatheringWrite0(sb, cb, data, true, false);
    }

    @Test
    public void testGatheringWriteWithCompositeNotAutoRead() throws Throwable {
        run();
    }

    public void testGatheringWriteWithComposite(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testGatheringWrite0(sb, cb, data, true, true);
    }

    // Test for https://github.com/netty/netty/issues/2647
    @Test
    public void testGatheringWriteBig() throws Throwable {
        run();
    }

    public void testGatheringWriteBig(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        byte[] bigData = new byte[1024 * 1024 * 50];
        random.nextBytes(bigData);
        testGatheringWrite0(sb, cb, bigData, false, true);
    }

    private void testGatheringWrite0(
            ServerBootstrap sb, Bootstrap cb, byte[] data, boolean composite, boolean autoRead) throws Throwable {
        sb.childOption(ChannelOption.AUTO_READ, autoRead);
        cb.option(ChannelOption.AUTO_READ, autoRead);

        final TestHandler sh = new TestHandler(autoRead);
        final TestHandler ch = new TestHandler(autoRead);

        cb.handler(ch);
        sb.childHandler(sh);

        Channel sc = sb.bind().sync().channel();
        Channel cc = cb.connect().sync().channel();

        for (int i = 0; i < data.length;) {
            int length = Math.min(random.nextInt(1024 * 8), data.length - i);
            ByteBuf buf = Unpooled.wrappedBuffer(data, i, length);
            if (composite && i % 2 == 0) {
                int split =  buf.readableBytes() / 2;
                int size = buf.readableBytes() - split;
                int oldIndex = buf.writerIndex();
                buf.writerIndex(split);
                ByteBuf buf2 = Unpooled.buffer(size).writeBytes(buf, split, oldIndex - split);
                CompositeByteBuf comp = Unpooled.compositeBuffer();
                comp.addComponent(true, buf).addComponent(true, buf2);
                cc.write(comp);
            } else {
                cc.write(buf);
            }
            i += length;
        }

        ChannelFuture cf = cc.writeAndFlush(Unpooled.EMPTY_BUFFER);
        assertNotEquals(cc.voidPromise(), cf);
        try {
            assertTrue(cf.await(30000));
            cf.sync();
        } catch (Throwable t) {
            // TODO: Remove this once we fix this test.
            TestUtils.dump(StringUtil.simpleClassName(this));
            throw t;
        }

        while (sh.counter < data.length) {
            if (sh.exception.get() != null) {
                break;
            }
            if (ch.exception.get() != null) {
                break;
            }
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                // Ignore.
            }
        }
        sh.channel.close().sync();
        ch.channel.close().sync();
        sc.close().sync();

        if (sh.exception.get() != null && !(sh.exception.get() instanceof IOException)) {
            throw sh.exception.get();
        }
        if (sh.exception.get() != null) {
            throw sh.exception.get();
        }
        if (ch.exception.get() != null && !(ch.exception.get() instanceof IOException)) {
            throw ch.exception.get();
        }
        if (ch.exception.get() != null) {
            throw ch.exception.get();
        }
        assertEquals(0, ch.counter);
        assertEquals(Unpooled.wrappedBuffer(data), sh.received);
    }

    private static class TestHandler extends SimpleChannelInboundHandler<ByteBuf> {
        private final boolean autoRead;
        volatile Channel channel;
        final AtomicReference<Throwable> exception = new AtomicReference();
        volatile int counter;
        final ByteBuf received = Unpooled.buffer();

        TestHandler(boolean autoRead) {
            this.autoRead = autoRead;
        }

        @Override
        public void channelActive(ChannelHandlerContext ctx)
                throws Exception {
            channel = ctx.channel();
            if (!autoRead) {
                ctx.read();
            }
        }

        @Override
        public void channelRead0(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
            counter += in.readableBytes();
            received.writeBytes(in);
        }

        @Override
        public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
            if (!autoRead) {
                ctx.read();
            }
        }

        @Override
        public void exceptionCaught(ChannelHandlerContext ctx,
                Throwable cause) throws Exception {
            if (exception.compareAndSet(null, cause)) {
                ctx.close();
            }
        }
    }
}

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