diff --git a/cron_example/cron_example.info.yml b/cron_example/cron_example.info.yml
new file mode 100644
index 0000000..19bb5b4
--- /dev/null
+++ b/cron_example/cron_example.info.yml
@@ -0,0 +1,5 @@
+name: Cron example
+type: module
+description: 'Demonstrates hook_cron() and related features'
+package: Example modules
+core: 8.x
diff --git a/cron_example/cron_example.module b/cron_example/cron_example.module
new file mode 100644
index 0000000..fb901cb
--- /dev/null
+++ b/cron_example/cron_example.module
@@ -0,0 +1,250 @@
+<?php
+/**
+ * @file
+ *   Demonstrates use of the Cron API in Drupal - hook_cron().
+ */
+
+/**
+ * @defgroup cron_example Example: Cron
+ * @ingroup examples
+ * @{
+ * Example using Cron API, including hook_cron() and hook_cron_queue_info().
+ *
+ * This example is part of the Examples for Developers Project
+ * which you can download and experiment with at
+ * http://drupal.org/project/examples
+ */
+
+/**
+ * Implements hook_menu().
+ */
+function cron_example_menu() {
+  $items['examples/cron_example'] = array(
+    'title' => 'Cron Example',
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('cron_example_form'),
+    'access callback' => TRUE,
+  );
+
+  return $items;
+}
+
+/**
+ * The form to provide a link to cron.php.
+ */
+function cron_example_form($form, &$form_state) {
+  $form['status'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Cron status information'),
+  );
+  $form['status']['intro'] = array(
+    '#markup' => '<div>' . t('The cron example demonstrates hook_cron() and hook_cron_queue_info() processing. If you have administrative privileges you can run cron from this page and see the results.') . '</div>',
+  );
+  $form['status']['last'] = array(
+    '#markup' => '<div>' . t('cron_example_cron() will next execute the first time cron runs after %time (%seconds seconds from now)' . '</div>',
+      array(
+        '%time' => date_iso8601(variable_get('cron_example_next_execution', time())),
+        '%seconds' => variable_get('cron_example_next_execution', time()) - time(),
+      )
+    ),
+  );
+
+  if (user_access('administer site configuration')) {
+    $form['cron_run'] = array(
+      '#type' => 'fieldset',
+      '#title' => t('Run cron manually'),
+    );
+    $form['cron_run']['cron_reset'] = array(
+      '#type' => 'checkbox',
+      '#title' => t("Run cron_example's cron regardless of whether interval has expired."),
+      '#default_value' => FALSE,
+    );
+    $form['cron_run']['cron_trigger'] = array(
+      '#type' => 'submit',
+      '#value' => t('Run cron now'),
+      '#submit' => array('cron_example_form_cron_run_submit'),
+    );
+  }
+
+  $form['cron_queue_setup'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Cron queue setup (for hook_cron_queue_info(), etc.)'),
+  );
+  $queue_1 = queue('cron_example_queue_1');
+  $queue_2 = queue('cron_example_queue_2');
+  $form['cron_queue_setup']['current_cron_queue_status'] = array(
+    '#markup' => '<div>' . t('There are currently %queue_1 items in queue 1 and %queue_2 items in queue 2',
+      array(
+        '%queue_1' => $queue_1->numberOfItems(),
+        '%queue_2' => $queue_2->numberOfItems(),
+      )) . '</div>',
+  );
+  $form['cron_queue_setup']['num_items'] = array(
+    '#type' => 'select',
+    '#title' => t('Number of items to add to queue'),
+    '#options' => drupal_map_assoc(array(1, 5, 10, 100, 1000)),
+    '#default_value' => 5,
+  );
+  $form['cron_queue_setup']['queue'] = array(
+    '#type' => 'radios',
+    '#title' => t('Queue to add items to'),
+    '#options' => array(
+      'cron_example_queue_1' => t('Queue 1'),
+      'cron_example_queue_2' => t('Queue 2'),
+    ),
+    '#default_value' => 'cron_example_queue_1',
+  );
+  $form['cron_queue_setup']['submit'] = array(
+    '#type' => 'submit',
+    '#value' => t('Add jobs to queue'),
+    '#submit' => array('cron_example_add_jobs_to_queue'),
+  );
+
+  $form['configuration'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Configuration of cron_example_cron()'),
+  );
+  $form['configuration']['cron_example_interval'] = array(
+    '#type' => 'select',
+    '#title' => t('Cron interval'),
+    '#description' => t('Time after which cron_example_cron will respond to a processing request.'),
+    '#default_value' => variable_get('cron_example_interval', 60*60),
+    '#options' => array(
+      60 => t('1 minute'),
+      300 => t('5 minutes'),
+      3600 => t('1 hour'),
+      60*60*24 => t('1 day'),
+    ),
+  );
+
+  return system_settings_form($form);
+}
+
+/**
+ * Allow user to directly execute cron, optionally forcing it.
+ */
+function cron_example_form_cron_run_submit($form, &$form_state) {
+  if (!empty($form_state['values']['cron_reset'])) {
+    variable_set('cron_example_next_execution', 0);
+  }
+
+  // We don't usually use globals in this way. This is used here only to
+  // make it easy to tell if cron was run by this form.
+  $GLOBALS['cron_example_show_status_message'] = TRUE;
+  if (drupal_cron_run()) {
+    drupal_set_message(t('Cron ran successfully.'));
+  }
+  else {
+    drupal_set_message(t('Cron run failed.'), 'error');
+  }
+}
+
+/**
+ * #submit function used to add the items to the queue when signaled by
+ * the form.
+ */
+function cron_example_add_jobs_to_queue($form, &$form_state) {
+  $queue = $form_state['values']['queue'];
+  $num_items = $form_state['values']['num_items'];
+
+  $queue = queue($queue);
+  for ($i=1; $i <= $num_items; $i++) {
+    $item = new stdClass();
+    $item->created = time();
+    $item->sequence = $i;
+    $queue->createItem($item);
+  }
+}
+
+/**
+ * Implements hook_cron().
+ *
+ * hook_cron() is the traditional (pre-Drupal 7) hook for doing "background"
+ * processing. It gets called every time the Drupal cron runs and must decide
+ * what it will do.
+ *
+ * In this example, it does a watchdog() call after the time named in
+ * the variable 'cron_example_next_execution' has arrived, and then it
+ * resets that variable to a time in the future.
+ */
+function cron_example_cron() {
+  // Default to an hourly interval. Of course, cron has to be running at least
+  // hourly for this to work.
+  $interval = variable_get('cron_example_interval', 60*60);
+  // We usually don't want to act every time cron runs (which could be every
+  // minute) so keep a time for the next run in a variable.
+
+  if (time() >= variable_get('cron_example_next_execution', 0)) {
+    // This is a silly example of a cron job.
+    // It just makes it obvious that the job has run without
+    // making any changes to your database.
+    watchdog('cron_example', 'cron_example ran');
+    if (!empty($GLOBALS['cron_example_show_status_message'])) {
+      drupal_set_message(t('cron_example executed at %time', array('%time' => date_iso8601(time(0)))));
+    }
+    variable_set('cron_example_next_execution', time() + $interval);
+  }
+}
+
+
+/**
+ * Implements hook_queue_info().
+ *
+ * hook_cron_queue_info() and family are new since Drupal 7, and allow any
+ * process to add work to the queue to be acted on when cron runs. Queues are
+ * described and worker callbacks are provided, and then only the worker
+ * callback needs to be implemented.
+ *
+ * All the details of queue use are done by the cron_queue implementation, so
+ * one doesn't need to know much about DrupalQueue().
+ *
+ * @see queue_example.module
+ */
+function cron_example_queue_info() {
+  $queues['cron_example_queue_1'] = array(
+    'worker callback' => 'cron_example_queue_1_worker',
+    'cron' => array(
+      // One second max runtime per cron run.
+      'time' => 1,
+    ),
+  );
+  $queues['cron_example_queue_2'] = array(
+    'worker callback' => 'cron_example_queue_2_worker',
+    'cron' => array(
+      'time' => 20,
+    ),
+  );
+  return $queues;
+}
+
+/**
+ * Simple workers for the two queues.
+ *
+ * @param $item
+ *   Any object to be worked on.
+ */
+function cron_example_queue_1_worker($item) {
+  cron_example_queue_report_work(1, $item);
+}
+function cron_example_queue_2_worker($item) {
+  cron_example_queue_report_work(2, $item);
+}
+
+/**
+ * Simple reporter for the workers.
+ *
+ * @param $worker
+ *   (integer) worker number
+ * @param $item
+ *   (object) the $item which was stored in the cron queue.
+ */
+function cron_example_queue_report_work($worker, $item) {
+  if (!empty($GLOBALS['cron_example_show_status_message'])) {
+    drupal_set_message(t('Queue @worker worker processed item with sequence @sequence created at @time', array('@worker' => $worker, '@sequence' => $item->sequence, '@time' => date_iso8601($item->created))));
+  }
+  watchdog('cron_example', 'Queue @worker worker processed item with sequence @sequence created at @time', array('@worker' => $worker, '@sequence' => $item->sequence, '@time' => date_iso8601($item->created)));
+}
+
+/**
+ * @} End of "defgroup cron_example".
+ */
diff --git a/cron_example/lib/Drupal/cron_example/Tests/CronExampleTestCase.php b/cron_example/lib/Drupal/cron_example/Tests/CronExampleTestCase.php
new file mode 100644
index 0000000..6d1a651
--- /dev/null
+++ b/cron_example/lib/Drupal/cron_example/Tests/CronExampleTestCase.php
@@ -0,0 +1,89 @@
+<?php
+/**
+ * @file
+ * Test case for testing the cron example module.
+ */
+
+/**
+ * @addtogroup cron_example
+ * @{
+ */
+namespace Drupal\cron_example\Tests;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * cron_example test class
+ */
+class CronExampleTestCase extends WebTestBase {
+  public static $modules = array('cron_example');
+  protected $web_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Cron example functionality',
+      'description' => 'Test the functionality of the Cron Example.',
+      'group' => 'Examples',
+    );
+  }
+
+  /**
+   * Enable modules and create user with specific permissions.
+   */
+  function setUp() {
+    parent::setUp();
+    // Create user. Search content permission granted for the search block to
+    // be shown.
+    $this->web_user = $this->drupalCreateUser(array('administer site configuration'));
+    $this->drupalLogin($this->web_user);
+  }
+
+  /**
+   * Login user, create an example node, and test block functionality through
+   * the admin and user interfaces.
+   */
+  function testCronExampleBasic() {
+    // Pretend that cron has never been run (even though simpletest seems to
+    // run it once...)
+    variable_set('cron_example_next_execution', 0);
+    $this->drupalGet('examples/cron_example');
+
+    // Initial run should cause cron_example_cron() to fire.
+    $post = array();
+    $this->drupalPost('examples/cron_example', $post, t('Run cron now'));
+    $this->assertText(t('cron_example executed at'));
+
+    // Forcing should also cause cron_example_cron() to fire.
+    $post['cron_reset'] = TRUE;
+    $this->drupalPost(NULL, $post, t('Run cron now'));
+    $this->assertText(t('cron_example executed at'));
+
+    // But if followed immediately and not forced, it should not fire.
+    $post['cron_reset'] = FALSE;
+    $this->drupalPost(NULL, $post, t('Run cron now'));
+    $this->assertNoText(t('cron_example executed at'));
+
+
+    $this->assertText(t('There are currently 0 items in queue 1 and 0 items in queue 2'));
+    $post = array(
+      'num_items' => 5,
+      'queue' => 'cron_example_queue_1',
+    );
+    $this->drupalPost(NULL, $post, t('Add jobs to queue'));
+    $this->assertText('There are currently 5 items in queue 1 and 0 items in queue 2');
+    $post = array(
+      'num_items' => 100,
+      'queue' => 'cron_example_queue_2',
+    );
+    $this->drupalPost(NULL, $post, t('Add jobs to queue'));
+    $this->assertText('There are currently 5 items in queue 1 and 100 items in queue 2');
+
+    $post = array();
+    $this->drupalPost('examples/cron_example', $post, t('Run cron now'));
+    $this->assertPattern('/Queue 1 worker processed item with sequence 5 /');
+    $this->assertPattern('/Queue 2 worker processed item with sequence 100 /');
+  }
+}
+
+/**
+ * @} End of "addtogroup cron_example".
+ */