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<?php |
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|
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namespace SyncBasalam; |
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|
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use SyncBasalam\Admin\Settings; |
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use SyncBasalam\Services\Api\CircuitBreaker; |
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|
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defined('ABSPATH') || exit; |
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|
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class JobsRunner |
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{ |
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private const ASYNC_ACTION = 'sync_basalam_run_jobs_async'; |
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private const ASYNC_DISPATCH_LOCK_TRANSIENT = 'sync_basalam_jobs_runner_async_dispatch_lock'; |
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private const ASYNC_IDLE_PROBE_TRANSIENT = 'sync_basalam_jobs_runner_idle_probe_lock'; |
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// Keep the dispatch lease longer than a normal async batch. Without this, |
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// every frontend request can boot another full WordPress AJAX worker while |
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// a large product queue is active. |
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private const ASYNC_DISPATCH_LOCK_SECONDS = 25; |
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private const ASYNC_IDLE_PROBE_SECONDS = 5; |
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private const ASYNC_TIME_LIMIT_SECONDS = 20; |
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private const GLOBAL_RUNNER_LAST_RUN_OPTION = 'sync_basalam_jobs_runner_last_run'; |
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private const STALE_PROCESSING_TIMEOUT_SECONDS = 120; |
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|
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private $jobExecutor; |
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private $jobManager; |
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private $discountScheduler; |
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private $CheckHttpBlockService; |
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|
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public function __construct( |
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$jobManager, |
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$jobExecutor, |
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$discountScheduler, |
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$CheckHttpBlockService |
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) { |
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add_action('wp_ajax_' . self::ASYNC_ACTION, [$this, 'handleAsyncRequest']); |
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add_action('wp_ajax_nopriv_' . self::ASYNC_ACTION, [$this, 'handleAsyncRequest']); |
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// Run before later shutdown callbacks can leave an unread mysqli result. |
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add_action('shutdown', [$this, 'maybeDispatchAsyncRequest'], 2); |
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add_action('sync_basalam_job_created', [$this, 'maybeDispatchAsyncRequest'], 10, 0); |
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|
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$this->jobManager = $jobManager; |
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$this->jobExecutor = $jobExecutor; |
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$this->discountScheduler = $discountScheduler; |
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$this->CheckHttpBlockService = $CheckHttpBlockService; |
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} |
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|
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public function maybeDispatchAsyncRequest(): void |
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{ |
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if ($this->isCurrentAsyncRequest()) return; |
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|
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if ($this->isShutdownCallback()) { |
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$this->finishFastCgiResponse(); |
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$this->repairDatabaseConnection(); |
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} |
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|
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if ($this->CheckHttpBlockService->SyncBasalamHttpBlock()) return; |
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$isNewJob = function_exists('current_filter') && current_filter() === 'sync_basalam_job_created'; |
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if (!$isNewJob && get_transient(self::ASYNC_IDLE_PROBE_TRANSIENT)) return; |
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if (get_transient(self::ASYNC_DISPATCH_LOCK_TRANSIENT)) return; |
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|
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if (!$this->jobManager->hasPendingOrStaleProcessingJobs(self::STALE_PROCESSING_TIMEOUT_SECONDS)) { |
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if (!$isNewJob) { |
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set_transient(self::ASYNC_IDLE_PROBE_TRANSIENT, 1, self::ASYNC_IDLE_PROBE_SECONDS); |
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} |
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return; |
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} |
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|
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// An empty-queue probe must not block a job created moments later. |
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// The global database lock still prevents duplicate workers from |
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// processing the same queue when requests race here. |
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if (get_transient(self::ASYNC_DISPATCH_LOCK_TRANSIENT)) return; |
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set_transient(self::ASYNC_DISPATCH_LOCK_TRANSIENT, 1, self::ASYNC_DISPATCH_LOCK_SECONDS); |
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|
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$this->dispatchAsyncRequest(); |
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} |
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|
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private function isShutdownCallback(): bool |
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{ |
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return function_exists('current_filter') && current_filter() === 'shutdown'; |
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} |
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|
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private function finishFastCgiResponse(): void |
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{ |
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if (function_exists('fastcgi_finish_request')) { |
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fastcgi_finish_request(); |
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} |
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} |
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|
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private function repairDatabaseConnection(): void |
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{ |
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global $wpdb; |
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|
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if (!isset($wpdb) || !is_object($wpdb)) return; |
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|
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if (method_exists($wpdb, 'flush')) { |
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$wpdb->flush(); |
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} |
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|
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if (method_exists($wpdb, 'check_connection')) { |
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$wpdb->check_connection(false); |
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} |
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} |
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|
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public function handleAsyncRequest(): void |
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{ |
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if (!check_ajax_referer(self::ASYNC_ACTION, 'nonce', false)) { |
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wp_send_json_error(['message' => 'Invalid async jobs runner nonce.'], 403); |
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} |
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|
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if (function_exists('ignore_user_abort')) { |
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ignore_user_abort(true); |
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} |
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|
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if (function_exists('session_write_close')) { |
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session_write_close(); |
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} |
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|
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$processed = $this->runAsyncBatch(); |
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|
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wp_send_json_success(['processed' => $processed]); |
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} |
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|
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public function checkAndRunJobs(): bool |
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{ |
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if ($this->CheckHttpBlockService->SyncBasalamHttpBlock()) return false; |
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if (!$this->jobExecutor->acquireGlobalJobsLock(0)) return false; |
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|
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try { |
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return $this->runEligibleJobs(); |
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} finally { |
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$this->jobExecutor->releaseGlobalJobsLock(); |
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} |
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} |
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|
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private function runAsyncBatch(): int |
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{ |
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if ($this->CheckHttpBlockService->SyncBasalamHttpBlock()) return 0; |
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|
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// Hold the advisory lock for the whole batch, including rate-limit |
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// waits. Previously it was released after every job, so duplicate |
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// async requests could pile up and sleep in parallel until the next |
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// job became eligible, exhausting the site's PHP workers. |
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if (!$this->jobExecutor->acquireGlobalJobsLock(0)) return 0; |
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|
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$processed = 0; |
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$deadline = microtime(true) + (float) apply_filters( |
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'sync_basalam_jobs_runner_async_time_limit', |
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self::ASYNC_TIME_LIMIT_SECONDS |
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); |
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|
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try { |
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while (microtime(true) < $deadline) { |
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if (!$this->jobManager->hasPendingOrStaleProcessingJobs(self::STALE_PROCESSING_TIMEOUT_SECONDS)) { |
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break; |
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} |
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|
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$ranJob = $this->runEligibleJobs(); |
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|
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if ($ranJob) { |
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$processed++; |
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} |
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|
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$delay = $this->secondsUntilNextAllowedRun(); |
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if ($delay <= 0.0) { |
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if (!$ranJob) break; |
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continue; |
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} |
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|
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if ((microtime(true) + $delay) >= $deadline) { |
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break; |
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} |
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|
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usleep((int) ($delay * 1000000)); |
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} |
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} finally { |
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$this->jobExecutor->releaseGlobalJobsLock(); |
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} |
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|
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return $processed; |
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} |
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|
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private function runEligibleJobs(): bool |
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{ |
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$this->jobManager->ConvertStaleProcessingJobs(self::STALE_PROCESSING_TIMEOUT_SECONDS); |
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$this->discountScheduler->process(); |
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|
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$circuitBreaker = new CircuitBreaker(); |
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if ($circuitBreaker->getState() === CircuitBreaker::STATE_OPEN) { |
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return false; |
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} |
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|
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if ($this->jobManager->hasAnyProcessingJob()) { |
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return false; |
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} |
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|
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$lastRun = floatval(get_option(self::GLOBAL_RUNNER_LAST_RUN_OPTION, 0)); |
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$now = microtime(true); |
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|
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if (($now - $lastRun) < $this->getRunThresholdSeconds()) { |
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return false; |
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} |
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|
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$sortedJobTypes = $this->jobExecutor->getSortedJobTypes(); |
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|
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foreach ($sortedJobTypes as $jobType => $jobExecutor) { |
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if (!$this->jobExecutor->canRun($jobType)) { |
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continue; |
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} |
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|
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$job = $this->jobManager->getNextEligibleJob($jobType); |
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$processingJob = $this->jobManager->getJob(['job_type' => $jobType, 'status' => 'processing']); |
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|
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if (!$job || $processingJob) { |
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continue; |
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} |
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|
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update_option(self::GLOBAL_RUNNER_LAST_RUN_OPTION, microtime(true), false); |
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|
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$this->jobManager->updateJob( |
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['status' => 'processing', 'started_at' => time()], |
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['id' => $job->id] |
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); |
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|
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$this->executeJob($job); |
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return true; |
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} |
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|
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return false; |
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} |
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|
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private function executeJob(object $job): void |
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{ |
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$jobType = $job->job_type; |
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$this->jobExecutor->execute($jobType, $job); |
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} |
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|
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private function dispatchAsyncRequest(): void |
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{ |
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$url = add_query_arg('action', self::ASYNC_ACTION, admin_url('admin-ajax.php')); |
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|
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wp_remote_post(esc_url_raw($url), [ |
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'timeout' => 0.01, |
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'blocking' => false, |
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'body' => [ |
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'action' => self::ASYNC_ACTION, |
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'nonce' => wp_create_nonce(self::ASYNC_ACTION), |
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], |
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'cookies' => $_COOKIE, |
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'sslverify' => apply_filters('https_local_ssl_verify', false), |
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'headers' => [ |
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'X-WP-Async-Request' => self::ASYNC_ACTION, |
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], |
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]); |
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} |
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|
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private function isCurrentAsyncRequest(): bool |
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{ |
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if (!wp_doing_ajax()) return false; |
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|
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$action = isset($_REQUEST['action']) ? sanitize_key(wp_unslash($_REQUEST['action'])) : ''; |
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|
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return $action === self::ASYNC_ACTION; |
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} |
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|
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private function secondsUntilNextAllowedRun(): float |
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{ |
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$lastRun = floatval(get_option(self::GLOBAL_RUNNER_LAST_RUN_OPTION, 0)); |
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$elapsed = microtime(true) - $lastRun; |
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|
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return max(0.0, $this->getRunThresholdSeconds() - $elapsed); |
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} |
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|
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private function getRunThresholdSeconds(): float |
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{ |
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$tasksPerMinute = max(1, intval(Settings::getEffectiveTasksPerMinute())); |
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|
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return 60.0 / $tasksPerMinute; |
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} |
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} |
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|
