<?php
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namespace JVBase\managers\queue;
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if (!defined('ABSPATH')) {
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exit;
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}
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class Locker
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{
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private string $lockKey;
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private int $ttl;
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private ?string $token = null;
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public function __construct(string $key = 'queue_processor', int $ttl = 300)
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{
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$this->lockKey = BASE . '_lock_' . $key;
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$this->ttl = $ttl;
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}
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public function acquire(): bool
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{
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// Generate unique token for this process
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$this->token = uniqid(gethostname() . '_', true);
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// SET NX with TTL - atomic "set if not exists"
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$result = wp_cache_add($this->lockKey, $this->token, 'locks', $this->ttl);
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return $result === true;
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}
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public function release(): void
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{
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if (!$this->token) {
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return;
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}
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// Only release if we own the lock
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$current = wp_cache_get($this->lockKey, 'locks');
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if ($current === $this->token) {
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wp_cache_delete($this->lockKey, 'locks');
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}
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$this->token = null;
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}
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public function isLocked(): bool
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{
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return wp_cache_get($this->lockKey, 'locks') !== false;
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}
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/**
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* Execute callback with lock, auto-release after
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*/
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public function withLock(callable $callback): mixed
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{
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if (!$this->acquire()) {
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return null;
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}
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try {
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return $callback();
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} finally {
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$this->release();
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}
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}
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}
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