diff core/lib/Drupal/Core/Cron.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Cron.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,240 @@
+<?php
+
+namespace Drupal\Core;
+
+use Drupal\Component\Utility\Timer;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Queue\QueueWorkerManagerInterface;
+use Drupal\Core\Queue\RequeueException;
+use Drupal\Core\State\StateInterface;
+use Drupal\Core\Lock\LockBackendInterface;
+use Drupal\Core\Queue\QueueFactory;
+use Drupal\Core\Session\AnonymousUserSession;
+use Drupal\Core\Session\AccountSwitcherInterface;
+use Drupal\Core\Queue\SuspendQueueException;
+use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
+
+/**
+ * The Drupal core Cron service.
+ */
+class Cron implements CronInterface {
+
+  /**
+   * The module handler service.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The lock service.
+   *
+   * @var \Drupal\Core\Lock\LockBackendInterface
+   */
+  protected $lock;
+
+  /**
+   * The queue service.
+   *
+   * @var \Drupal\Core\Queue\QueueFactory
+   */
+  protected $queueFactory;
+
+  /**
+   * The state service.
+   *
+   * @var \Drupal\Core\State\StateInterface
+   */
+  protected $state;
+
+  /**
+   * The account switcher service.
+   *
+   * @var \Drupal\Core\Session\AccountSwitcherInterface
+   */
+  protected $accountSwitcher;
+
+  /**
+   * A logger instance.
+   *
+   * @var \Psr\Log\LoggerInterface
+   */
+  protected $logger;
+
+  /**
+   * The queue plugin manager.
+   *
+   * @var \Drupal\Core\Queue\QueueWorkerManagerInterface
+   */
+  protected $queueManager;
+
+  /**
+   * Constructs a cron object.
+   *
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler
+   * @param \Drupal\Core\Lock\LockBackendInterface $lock
+   *   The lock service.
+   * @param \Drupal\Core\Queue\QueueFactory $queue_factory
+   *   The queue service.
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state service.
+   * @param \Drupal\Core\Session\AccountSwitcherInterface $account_switcher
+   *   The account switching service.
+   * @param \Psr\Log\LoggerInterface $logger
+   *   A logger instance.
+   * @param \Drupal\Core\Queue\QueueWorkerManagerInterface $queue_manager
+   *   The queue plugin manager.
+   */
+  public function __construct(ModuleHandlerInterface $module_handler, LockBackendInterface $lock, QueueFactory $queue_factory, StateInterface $state, AccountSwitcherInterface $account_switcher, LoggerInterface $logger, QueueWorkerManagerInterface $queue_manager) {
+    $this->moduleHandler = $module_handler;
+    $this->lock = $lock;
+    $this->queueFactory = $queue_factory;
+    $this->state = $state;
+    $this->accountSwitcher = $account_switcher;
+    $this->logger = $logger;
+    $this->queueManager = $queue_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function run() {
+    // Allow execution to continue even if the request gets cancelled.
+    @ignore_user_abort(TRUE);
+
+    // Force the current user to anonymous to ensure consistent permissions on
+    // cron runs.
+    $this->accountSwitcher->switchTo(new AnonymousUserSession());
+
+    // Try to allocate enough time to run all the hook_cron implementations.
+    drupal_set_time_limit(240);
+
+    $return = FALSE;
+
+    // Try to acquire cron lock.
+    if (!$this->lock->acquire('cron', 900.0)) {
+      // Cron is still running normally.
+      $this->logger->warning('Attempting to re-run cron while it is already running.');
+    }
+    else {
+      $this->invokeCronHandlers();
+      $this->setCronLastTime();
+
+      // Release cron lock.
+      $this->lock->release('cron');
+
+      // Return TRUE so other functions can check if it did run successfully
+      $return = TRUE;
+    }
+
+    // Process cron queues.
+    $this->processQueues();
+
+    // Restore the user.
+    $this->accountSwitcher->switchBack();
+
+    return $return;
+  }
+
+  /**
+   * Records and logs the request time for this cron invocation.
+   */
+  protected function setCronLastTime() {
+    // Record cron time.
+    $this->state->set('system.cron_last', REQUEST_TIME);
+    $this->logger->notice('Cron run completed.');
+  }
+
+  /**
+   * Processes cron queues.
+   */
+  protected function processQueues() {
+    // Grab the defined cron queues.
+    foreach ($this->queueManager->getDefinitions() as $queue_name => $info) {
+      if (isset($info['cron'])) {
+        // Make sure every queue exists. There is no harm in trying to recreate
+        // an existing queue.
+        $this->queueFactory->get($queue_name)->createQueue();
+
+        $queue_worker = $this->queueManager->createInstance($queue_name);
+        $end = time() + (isset($info['cron']['time']) ? $info['cron']['time'] : 15);
+        $queue = $this->queueFactory->get($queue_name);
+        $lease_time = isset($info['cron']['time']) ?: NULL;
+        while (time() < $end && ($item = $queue->claimItem($lease_time))) {
+          try {
+            $queue_worker->processItem($item->data);
+            $queue->deleteItem($item);
+          }
+          catch (RequeueException $e) {
+            // The worker requested the task be immediately requeued.
+            $queue->releaseItem($item);
+          }
+          catch (SuspendQueueException $e) {
+            // If the worker indicates there is a problem with the whole queue,
+            // release the item and skip to the next queue.
+            $queue->releaseItem($item);
+
+            watchdog_exception('cron', $e);
+
+            // Skip to the next queue.
+            continue 2;
+          }
+          catch (\Exception $e) {
+            // In case of any other kind of exception, log it and leave the item
+            // in the queue to be processed again later.
+            watchdog_exception('cron', $e);
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * Invokes any cron handlers implementing hook_cron.
+   */
+  protected function invokeCronHandlers() {
+    $module_previous = '';
+
+    // If detailed logging isn't enabled, don't log individual execution times.
+    $time_logging_enabled = \Drupal::config('system.cron')->get('logging');
+    $logger = $time_logging_enabled ? $this->logger : new NullLogger();
+
+    // Iterate through the modules calling their cron handlers (if any):
+    foreach ($this->moduleHandler->getImplementations('cron') as $module) {
+
+      if (!$module_previous) {
+        $logger->notice('Starting execution of @module_cron().', [
+          '@module' => $module,
+        ]);
+      }
+      else {
+        $logger->notice('Starting execution of @module_cron(), execution of @module_previous_cron() took @time.', [
+          '@module' => $module,
+          '@module_previous' => $module_previous,
+          '@time' => Timer::read('cron_' . $module_previous) . 'ms',
+        ]);
+      }
+      Timer::start('cron_' . $module);
+
+      // Do not let an exception thrown by one module disturb another.
+      try {
+        $this->moduleHandler->invoke($module, 'cron');
+      }
+      catch (\Exception $e) {
+        watchdog_exception('cron', $e);
+      }
+
+      Timer::stop('cron_' . $module);
+      $module_previous = $module;
+    }
+    if ($module_previous) {
+      $logger->notice('Execution of @module_previous_cron() took @time.', [
+        '@module_previous' => $module_previous,
+        '@time' => Timer::read('cron_' . $module_previous) . 'ms',
+      ]);
+    }
+  }
+
+}