一、协程与传统同步IO对比

二、任务调度系统核心实现

1. 协程任务管理器

class TaskScheduler {
    private $scheduler;
    private $maxWorkers = 100;
    private $taskQueue = [];

    public function __construct() {
        $this->scheduler = new SwooleCoroutineScheduler;
    }

    public function addTask(callable $task, $params = []) {
        $this->taskQueue[] = ['task' => $task, 'params' => $params];
    }

    public function run() {
        $channels = [];
        for ($i = 0; $i maxWorkers; $i++) {
            $channels[$i] = new SwooleCoroutineChannel(1);
        }

        $this->scheduler->parallel($this->maxWorkers, function() use ($channels) {
            $workerId = SwooleCoroutine::getCid() % $this->maxWorkers;
            while (true) {
                $taskData = $channels[$workerId]->pop();
                if ($taskData === false) break;
                
                try {
                    call_user_func_array($taskData['task'], $taskData['params']);
                } catch (Throwable $e) {
                    $this->logError($e);
                }
            }
        });

        // 分发任务到Worker
        foreach ($this->taskQueue as $taskItem) {
            $workerId = rand(0, $this->maxWorkers - 1);
            $channels[$workerId]->push($taskItem);
        }

        // 关闭通道
        foreach ($channels as $ch) {
            $ch->close();
        }

        $this->scheduler->start();
    }
}

2. 分布式任务队列集成

class RedisTaskQueue {
    private $redis;
    private $queueName = 'coroutine_tasks';

    public function __construct() {
        $this->redis = new SwooleCoroutineRedis();
        $this->redis->connect('127.0.0.1', 6379);
    }

    public function pushTask($taskType, $data) {
        $task = json_encode([
            'type' => $taskType,
            'data' => $data,
            'created_at' => time()
        ]);
        return $this->redis->lPush($this->queueName, $task);
    }

    public function popTask() {
        $task = $this->redis->brPop([$this->queueName], 2);
        return $task ? json_decode($task[1], true) : null;
    }
}

3. 协程HTTP客户端

class AsyncHttpClient {
    public static function request($urls) {
        $results = [];
        $scheduler = new SwooleCoroutineScheduler;
        
        $scheduler->add(function() use ($urls, &$results) {
            $tasks = [];
            foreach ($urls as $url) {
                $tasks[] = go(function() use ($url, &$results) {
                    $client = new SwooleCoroutineHttpClient(
                        parse_url($url, PHP_URL_HOST),
                        parse_url($url, PHP_URL_PORT),
                        parse_url($url, PHP_URL_PATH) === 'https'
                    );
                    
                    $client->get(parse_url($url, PHP_URL_PATH));
                    $results[$url] = $client->body;
                    $client->close();
                });
            }
            
            SwooleCoroutineBarrier::wait($tasks);
        });
        
        $scheduler->start();
        return $results;
    }
}

三、性能优化关键点

• 连接池管理：复用MySQL/Redis连接
• 协程数量控制：根据负载动态调整
• 内存优化：及时释放大对象
• 异常处理：避免单个任务崩溃影响全局

监控指标示例

$server->stats(); // 获取Swoole运行时状态
/*
[
    'coroutine_num' => 当前协程数量,
    'task_queue_num' => 待处理任务数,
    'request_count' => 累计请求数,
    'worker_request_count' => 当前Worker进程处理的请求数
]
*/

四、生产环境部署方案

1. 使用Supervisor管理进程
2. Nginx反向代理负载均衡
3. APM工具监控性能指标
4. 灰度发布验证稳定性