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Java example source code file (SctpEchoTest.java)

This example Java source code file (SctpEchoTest.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

bootstrap, channel, channelinitializer, echohandler, exception, interruptedexception, ioexception, override, random, sctpinboundbytestreamhandler, sctpmessagecompletionhandler, sctpoutboundbytestreamhandler, test, throwable, util

The SctpEchoTest.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.testsuite.transport.sctp;

import io.netty.bootstrap.Bootstrap;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.sctp.SctpChannel;
import io.netty.handler.codec.sctp.SctpInboundByteStreamHandler;
import io.netty.handler.codec.sctp.SctpMessageCompletionHandler;
import io.netty.handler.codec.sctp.SctpOutboundByteStreamHandler;
import io.netty.testsuite.util.TestUtils;
import org.junit.Assume;
import org.junit.Test;

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

import static org.junit.Assert.*;

public class SctpEchoTest extends AbstractSctpTest {

    private static final Random random = new Random();
    static final byte[] data = new byte[4096]; //could not test ultra jumbo frames

    static {
        random.nextBytes(data);
    }

    @Test
    public void testSimpleEcho() throws Throwable {
        Assume.assumeTrue(TestUtils.isSctpSupported());
        run();
    }

    public void testSimpleEcho(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testSimpleEcho0(sb, cb, false);
    }

    @Test
    public void testSimpleEchoUnordered() throws Throwable {
        Assume.assumeTrue(TestUtils.isSctpSupported());
        run();
    }

    public void testSimpleEchoUnordered(ServerBootstrap sb, Bootstrap cb) throws Throwable {
        testSimpleEcho0(sb, cb, true);
    }

    private static void testSimpleEcho0(ServerBootstrap sb, Bootstrap cb, final boolean unordered) throws Throwable {
        final EchoHandler sh = new EchoHandler();
        final EchoHandler ch = new EchoHandler();

        sb.childHandler(new ChannelInitializer<SctpChannel>() {
            @Override
            public void initChannel(SctpChannel c) throws Exception {
                c.pipeline().addLast(
                        new SctpMessageCompletionHandler(),
                        new SctpInboundByteStreamHandler(0, 0),
                        new SctpOutboundByteStreamHandler(0, 0, unordered),
                        sh);
            }
        });
        cb.handler(new ChannelInitializer<SctpChannel>() {
            @Override
            public void initChannel(SctpChannel c) throws Exception {
                c.pipeline().addLast(
                        new SctpMessageCompletionHandler(),
                        new SctpInboundByteStreamHandler(0, 0),
                        new SctpOutboundByteStreamHandler(0, 0, unordered),
                        ch);
            }
        });

        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 * 64), data.length - i);
            cc.writeAndFlush(Unpooled.wrappedBuffer(data, i, length));
            i += length;
        }

        while (ch.counter < data.length) {
            if (sh.exception.get() != null) {
                break;
            }
            if (ch.exception.get() != null) {
                break;
            }

            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                // Ignore.
            }
        }

        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 (ch.exception.get() != null && !(ch.exception.get() instanceof IOException)) {
            throw ch.exception.get();
        }
        if (sh.exception.get() != null) {
            throw sh.exception.get();
        }
        if (ch.exception.get() != null) {
            throw ch.exception.get();
        }
    }

    private static class EchoHandler extends SimpleChannelInboundHandler<ByteBuf> {
        volatile Channel channel;
        final AtomicReference<Throwable> exception = new AtomicReference();
        volatile int counter;

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

        @Override
        public void channelRead0(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
            byte[] actual = new byte[in.readableBytes()];
            in.readBytes(actual);

            int lastIdx = counter;
            for (int i = 0; i < actual.length; i++) {
                assertEquals(data[i + lastIdx], actual[i]);
            }

            if (channel.parent() != null) {
                channel.writeAndFlush(Unpooled.wrappedBuffer(actual));
            }

            counter += actual.length;
        }

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

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