#!/usr/bin/env php

<?php

declare(strict_types=1);

/**

* This example shows how to use Context objects in coroutines.

*

* The Context object of a coroutine is a key-value storage. It is used to store custom data for the coroutine.

*

* Each coroutine has a unique Context object automatically associated with it. The Context object of a coroutine can be

* accessed by calling method `\Swoole\Coroutine::getContext()`; the object can be accessed from anywhere of current

* process, as long as the associated coroutine still exists.

*

* The Context object will be automatically destroyed when the coroutine finishes execution and gets destroyed.

*

* How to run this script:

* docker compose exec -t client bash -c "./csp/context.php"

*

* The output should look like the following:

* Name of the object in the Context object of coroutine #1: co1_obj

* Name of the object in the Context object of coroutine #2: co2_obj

*

* Coroutine #2 is exiting. The context object of it will be destroyed.

* Object "co2_obj" is destroyed.

*

* Coroutine #1 is exiting. The context object of it will be destroyed.

* Object "co1_obj" is destroyed.

*/

use Swoole\Coroutine;

use function Swoole\Coroutine\run;

run(function (): void {

$class = new class {

public function __construct(public string $name = '')

{

}

public function __destruct()

{

if (!empty($this->name)) {

echo 'Object "', $this->name, '" is destroyed.' . PHP_EOL;

}

}

};

// Prior to PHP 8.2, items in the Context object of a coroutine could be set or accessed using dynamic properties,

// e.g.,

// Coroutine::getContext($cid)->foo = 'bar';

// Starting with PHP 8.2, dynamic properties are deprecated, so we use array-style access instead.

// The Context object of a coroutine works the same as an \ArrayObject object.

Coroutine::getContext()['co1_obj'] = new $class('co1_obj'); // @phpstan-ignore offsetAccess.nonOffsetAccessible

$cid = Coroutine::getCid(); // Coroutine::getCid() returns 1.

Coroutine::create(function () use ($class): void {

// The Context object of a coroutine works the same as an \ArrayObject object.

Coroutine::getContext()['co2_obj'] = new $class('co2_obj'); // @phpstan-ignore offsetAccess.nonOffsetAccessible

$cid = Coroutine::getCid(); // Coroutine::getCid() returns 2.

echo 'Name of the object in the Context object of coroutine #1: ', Coroutine::getContext(1)['co1_obj']->name, PHP_EOL; // @phpstan-ignore offsetAccess.nonOffsetAccessible,property.nonObject

echo 'Name of the object in the Context object of coroutine #2: ', Coroutine::getContext(2)['co2_obj']->name, PHP_EOL; // @phpstan-ignore offsetAccess.nonOffsetAccessible,property.nonObject

echo PHP_EOL, 'Coroutine #2 is exiting. The context object of it will be destroyed.', PHP_EOL;

});

echo PHP_EOL, 'Coroutine #1 is exiting. The context object of it will be destroyed.', PHP_EOL;

});