NioIoHandlerTest.java — netty Source File

Source Code

/*
 * Copyright 2025 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.nio;

import io.netty.channel.IoHandlerContext;
import io.netty.channel.IoHandler;
import io.netty.channel.IoHandlerFactory;
import io.netty.channel.IoRegistration;
import io.netty.util.concurrent.ThreadAwareExecutor;
import org.junit.jupiter.api.Test;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.channels.SelectionKey;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.spi.SelectorProvider;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;

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

public class NioIoHandlerTest {

    @Test
    void testNioHandlerCanBeDrivenByMainThread() throws Exception {
        IoHandlerFactory factory = NioIoHandler.newFactory();
        final Thread current = Thread.currentThread();
        final Queue<Runnable> tasks = new ConcurrentLinkedQueue<>();
        // Create our own IoExecutor that is driven by the main thread
        final ThreadAwareExecutor executor = new ThreadAwareExecutor() {
            @Override
            public boolean isExecutorThread(Thread thread) {
                return current == thread;
            }

            @Override
            public void execute(Runnable command) {
                tasks.add(command);
            }
        };
        IoHandlerContext context = new IoHandlerContext() {
            @Override
            public boolean canBlock() {
                // Just busy spin.
                return false;
// ... (76 more lines)