SingleThreadIoEventLoop.java — netty Source File

Source Code

/*
 * Copyright 2024 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;

import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.Promise;
import io.netty.util.concurrent.RejectedExecutionHandler;
import io.netty.util.concurrent.SingleThreadEventExecutor;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SystemPropertyUtil;

import java.util.Queue;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * {@link IoEventLoop} implementation that execute all its submitted tasks in a single thread using the provided
 * {@link IoHandler}.
 */
public class SingleThreadIoEventLoop extends SingleThreadEventLoop implements IoEventLoop {

    // TODO: Is this a sensible default ?
    private static final long DEFAULT_MAX_TASK_PROCESSING_QUANTUM_NS = TimeUnit.MILLISECONDS.toNanos(Math.max(100,
            SystemPropertyUtil.getInt("io.netty.eventLoop.maxTaskProcessingQuantumMs", 1000)));

    private final long maxTaskProcessingQuantumNs;
    private final IoHandlerContext context = new IoHandlerContext() {
        @Override
        public boolean canBlock() {
            assert inEventLoop();
            return !hasTasks() && !hasScheduledTasks();
        }

        @Override
        public long delayNanos(long currentTimeNanos) {
            assert inEventLoop();
            return SingleThreadIoEventLoop.this.delayNanos(currentTimeNanos);
        }

        @Override
        public long deadlineNanos() {
            assert inEventLoop();
            return SingleThreadIoEventLoop.this.deadlineNanos();
        }
// ... (266 more lines)