Parallel

Parallel is a parallel task scheduling tool that allows multiple asynchronous tasks to be executed concurrently within a program, and retrieves the results once all tasks are completed. Parallel is based on Barrier.

Note
The underlying driver type is automatically recognized and only supports Swoole/Swow/Fiber drivers.

Tip
This feature requires workerman >= 5.1.0

<?php
use Workerman\Connection\TcpConnection;
use Workerman\Coroutine\Parallel;
use Workerman\Events\Swoole;
use Workerman\Protocols\Http\Request;
use Workerman\Worker;
require_once __DIR__ . '/vendor/autoload.php';

// Http Server
$worker = new Worker('http://0.0.0.0:8001');
$worker->eventLoop = Swoole::class; // Or Swow::class or Fiber::class
$worker->onMessage = function (TcpConnection $connection, Request $request) {
    $parallel = new Parallel();
    for ($i=1; $i<5; $i++) {
        $parallel->add(function () use ($i) {
            // 执行某些操作
            return $i;
        });
    }
    $results = $parallel->wait();
    $connection->send(json_encode($results)); // 响应: [1,2,3,4]
};
Worker::runAll();

Interface Description

interface ParallelInterface
{
    /**
     * Constructor, $concurrent is the number of concurrent tasks, -1 means no limit on the number of concurrent tasks
     */
    public function __construct(int $concurrent = -1);

    /**
     * Add a parallel task
     */
    public function add(callable $callable, ?string $key = null): void;

    /**
     * Wait for all tasks to complete and return results
     */
    public function wait(): array;

    /**
     * Get the results of tasks that encountered exceptions
     */
    public function getExceptions(): array;
}