FixedChannelPoolMapDeadlockTest.java — netty Source File

Source Code

/*
 * Copyright 2019 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:
 *
 *   https://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.channel.pool;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.DefaultEventLoop;
import io.netty.channel.EventLoop;
import io.netty.channel.local.LocalAddress;
import io.netty.channel.local.LocalChannel;
import io.netty.util.concurrent.Future;
import org.junit.jupiter.api.Test;

import java.util.concurrent.Callable;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import static org.junit.jupiter.api.Assertions.assertSame;

/**
 * This is a test case for the deadlock scenario described in https://github.com/netty/netty/issues/8238.
 */
public class FixedChannelPoolMapDeadlockTest {

    private static final NoopHandler NOOP_HANDLER = new NoopHandler();

    @Test
    public void testDeadlockOnAcquire() throws Exception {

        final EventLoop threadA1 = new DefaultEventLoop();
        final Bootstrap bootstrapA1 = new Bootstrap()
                .channel(LocalChannel.class).group(threadA1).localAddress(new LocalAddress("A1"));
        final EventLoop threadA2 = new DefaultEventLoop();
        final Bootstrap bootstrapA2 = new Bootstrap()
                .channel(LocalChannel.class).group(threadA2).localAddress(new LocalAddress("A2"));
        final EventLoop threadB1 = new DefaultEventLoop();
        final Bootstrap bootstrapB1 = new Bootstrap()
                .channel(LocalChannel.class).group(threadB1).localAddress(new LocalAddress("B1"));
        final EventLoop threadB2 = new DefaultEventLoop();
        final Bootstrap bootstrapB2 = new Bootstrap()
                .channel(LocalChannel.class).group(threadB2).localAddress(new LocalAddress("B2"));

        final FixedChannelPool poolA1 = new FixedChannelPool(bootstrapA1, NOOP_HANDLER, 1);
        final FixedChannelPool poolA2 = new FixedChannelPool(bootstrapB2, NOOP_HANDLER, 1);
        final FixedChannelPool poolB1 = new FixedChannelPool(bootstrapB1, NOOP_HANDLER, 1);
// ... (205 more lines)