/**
* Only expose this plugin, if Background Process is 1.x.
*/
public function isValid($job = NULL)
{
static $correct_version;
if (!isset($correct_version)) {
$correct_version = FALSE;
// Interimistic way of determining version of Background Process.
// Background Process 1.x has a dependency on the Progress module.
if (module_exists('background_process')) {
$info = system_get_info('module', 'background_process');
if (!empty($info['dependencies']) && in_array('progress', $info['dependencies'])) {
$correct_version = TRUE;
}
}
}
return $correct_version && parent::isValid($job);
}
