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Path: /data/applications/aps.bak/drupal/6.9-5/standard/htdocs/sites/all/modules/ [ Home ]
File: poormanscron.module
<?php
// $Id: poormanscron.module,v 1.21 2008/02/06 16:35:17 robloach Exp $ $Name: DRUPAL-6--1-0 $

/**
 * @file
 * A module which runs Drupal cron jobs without the cron application.
 */

/**
 * Implementation of hook_help().
 */
function poormanscron_help($path, $arg) {
  switch ($path) {
    case 'admin/help#poormanscron':
      return '<p>'. t('The Poormanscron module runs cron jobs without the need of the cron application.') .'</p>';
    case 'admin/settings/poormanscron':
      return '<p>'. t('The settings provided here allow you to administer Poormancron.') .'</p>';
  }
}

/**
 * Implementation of hook_exit().
 *
 * Checks if poormanscron needs to be run. If this is the case, it invokes
 * the cron hooks of all enabled modules, which are executed after
 * all HTML is returned to the browser. So the user who kicks off the cron
 * jobs should not notice any delay.
 */
function poormanscron_exit() {

  // Calculate when the next poormanscron run is due.
  $lastrun = variable_get('poormanscron_lastrun', 0);
  $nextrun = $lastrun + 60 * variable_get('poormanscron_interval', 60);

  // If the configured time has passed, start the next poormanscron run.
  if (time() > $nextrun) {

    // If this cron run fails to complete, wait a few minutes before retrying.
    variable_set('poormanscron_lastrun',
       $lastrun + 60 * variable_get('poormanscron_retry_interval', 10));

    // Get the current Drupal messages. Use drupal_set_message() so that
    // the messages aren't deleted in case the cron run fails and
    // we don't get a chance to restore them below.
    $saved_messages = drupal_set_message();

    // Invoke the cron hooks of all enabled modules.
    if (variable_get('poormanscron_log_progress', 0) == 1) {
      // Invoke the cron hooks of all enabled modules and log the progress.
      $modules = module_list();
      foreach ($modules as $key => $value) {
        if (module_hook($key, 'cron')) {
          $tt = time();
          module_invoke($key, 'cron');
          watchdog('cron', "Executed %hook via poormanscron, took %time.", array('%time' => format_interval(time() - $tt, 1) . '.', '%hook' => "${key}_cron"));
        }
      }
    }
    else {
      // Invoke the cron hooks of all enabled modules, no progress logging.
      module_invoke_all('cron');
    }

    // Write a message to the logs if the user wants us to do so.
    if (variable_get('poormanscron_log_cron_runs', 1) == 1) {
      watchdog('cron', 'Cron run completed (via poormanscron).');
    }

    $t = time();

    // Update the time of the last poormanscron run (this one).
    variable_set('poormanscron_lastrun', $t);

    // Update the $cron_last variable, in order to update the
    // cron status in admin/settings.
    variable_set('cron_last', $t);

    // Delete any messages added during the cron run (and existing prior
    // messages).
    drupal_get_messages();

    // Restore any prior messages.
    if (isset($saved_messages)) {
      foreach ($saved_messages as $type => $types_messages) {
        foreach ($types_messages as $message) {
          drupal_set_message($message, $type);
        }
      }
    }
  }
}

/**
 * Implmentation of hook_menu().
 */
function poormanscron_menu() {
  $items = array();
  $items['admin/settings/poormanscron'] = array(
    'title' => 'Poormanscron',
    'description' => 'A module which runs Drupal cron jobs without the cron application.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('poormanscron_admin_settings'),
    'access arguments' => array('administer site configuration'),
    'file' => 'poormanscron.admin.inc',
  );
  return $items;
}