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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of fast-forward/fork. |
| 7 | * |
| 8 | * This source file is subject to the license bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 12 | * @license https://opensource.org/licenses/MIT MIT License |
| 13 | * |
| 14 | * @see https://github.com/php-fast-forward/fork |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\Fork\Worker; |
| 20 | |
| 21 | use ArrayIterator; |
| 22 | use FastForward\Fork\Manager\ForkManagerInterface; |
| 23 | use FastForward\Fork\Signal\Signal; |
| 24 | use Traversable; |
| 25 | |
| 26 | use function array_filter; |
| 27 | |
| 28 | /** |
| 29 | * Provides an immutable view over a collection of workers created by the same manager. |
| 30 | * |
| 31 | * This class acts as a value object representing a group of workers and offers |
| 32 | * convenience methods for querying and interacting with them collectively. |
| 33 | * |
| 34 | * Instances of this class MUST be treated as immutable. Consumers SHOULD NOT |
| 35 | * attempt to modify the internal worker collection after instantiation. |
| 36 | */ |
| 37 | class WorkerGroup implements WorkerGroupInterface |
| 38 | { |
| 39 | /** |
| 40 | * Stores the workers tracked by this group. |
| 41 | * |
| 42 | * @var array<int, WorkerInterface> |
| 43 | */ |
| 44 | private array $workers = []; |
| 45 | |
| 46 | /** |
| 47 | * Initializes the worker group. |
| 48 | * |
| 49 | * @param ForkManagerInterface $manager manager that created the grouped workers |
| 50 | * @param WorkerInterface ...$workers Workers exposed through this immutable group. |
| 51 | */ |
| 52 | public function __construct( |
| 53 | private ForkManagerInterface $manager, |
| 54 | WorkerInterface ...$workers, |
| 55 | ) { |
| 56 | foreach ($workers as $worker) { |
| 57 | $this->workers[$worker->getPid()] = $worker; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * {@inheritDoc} |
| 63 | */ |
| 64 | public function getManager(): ForkManagerInterface |
| 65 | { |
| 66 | return $this->manager; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * {@inheritDoc} |
| 71 | * |
| 72 | * @return array<int, WorkerInterface> |
| 73 | */ |
| 74 | public function all(): array |
| 75 | { |
| 76 | return $this->workers; |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * {@inheritDoc} |
| 81 | */ |
| 82 | public function get(int $pid): ?WorkerInterface |
| 83 | { |
| 84 | return $this->workers[$pid] ?? null; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * {@inheritDoc} |
| 89 | */ |
| 90 | public function wait(): void |
| 91 | { |
| 92 | $this->manager->wait($this); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * {@inheritDoc} |
| 97 | */ |
| 98 | public function kill(Signal $signal = Signal::Terminate): void |
| 99 | { |
| 100 | $this->manager->kill($signal, $this); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * {@inheritDoc} |
| 105 | * |
| 106 | * @return array<int, WorkerInterface> |
| 107 | */ |
| 108 | public function getRunning(): array |
| 109 | { |
| 110 | return array_filter($this->workers, static fn(WorkerInterface $worker): bool => $worker->isRunning()); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * {@inheritDoc} |
| 115 | * |
| 116 | * @return array<int, WorkerInterface> |
| 117 | */ |
| 118 | public function getStopped(): array |
| 119 | { |
| 120 | return array_filter($this->workers, static fn(WorkerInterface $worker): bool => ! $worker->isRunning()); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * {@inheritDoc} |
| 125 | */ |
| 126 | public function getIterator(): Traversable |
| 127 | { |
| 128 | return new ArrayIterator($this->workers); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * {@inheritDoc} |
| 133 | */ |
| 134 | public function count(): int |
| 135 | { |
| 136 | return \count($this->workers); |
| 137 | } |
| 138 | } |