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<?php
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/**
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* Default scheduled task handler.
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*/
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class RulesSchedulerDefaultTaskHandler implements RulesSchedulerTaskHandlerInterface {
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/**
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* The task array.
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*
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* @var array
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*/
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protected $task;
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/**
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* Constructs a repetitive task handler object.
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*/
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public function __construct(array $task) {
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$this->task = $task;
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}
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/**
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* Implements RulesSchedulerTaskHandlerInterface::runTask().
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*/
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public function runTask() {
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if ($component = rules_get_cache('comp_' . $this->task['config'])) {
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$replacements = array('%label' => $component->label(), '%plugin' => $component->plugin());
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$replacements['%identifier'] = $this->task['identifier'] ? $this->task['identifier'] : t('without identifier');
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rules_log('Scheduled evaluation of %plugin %label, task %identifier.', $replacements, RulesLog::INFO, $component, TRUE);
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$state = unserialize($this->task['data']);
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$state->restoreBlocks();
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// Block the config to prevent any future recursion.
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$state->block($component);
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// Finally evaluate the component with the given state.
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$component->evaluate($state);
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$state->unblock($component);
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rules_log('Finished evaluation of %plugin %label, task %identifier.', $replacements, RulesLog::INFO, $component, FALSE);
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$state->cleanUp();
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}
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}
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/**
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* Implements RulesSchedulerTaskHandlerInterface::afterTaskQueued().
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*/
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public function afterTaskQueued() {
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// Delete the task from the task list.
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db_delete('rules_scheduler')
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->condition('tid', $this->task['tid'])
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->execute();
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}
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/**
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* Implements RulesSchedulerTaskHandlerInterface::getTask().
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*/
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public function getTask() {
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return $this->task;
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}
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}
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/**
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* Interface for scheduled task handlers.
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*
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* Task handlers control the behavior of a task when it's queued or executed.
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* Unless specified otherwise, the RulesSchedulerDefaultTaskHandler task handler
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* is used.
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*
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* @see rules_scheduler_run_task()
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* @see rules_scheduler_cron()
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* @see RulesSchedulerDefaultTaskHandler
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*/
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interface RulesSchedulerTaskHandlerInterface {
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/**
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* Processes a queue item.
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*
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* @throws RulesEvaluationException
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* If there are any problems executing the task.
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*
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* @see rules_scheduler_run_task()
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*/
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public function runTask();
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/**
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* Processes a task after it has been queued.
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*
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* @see rules_scheduler_cron()
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*/
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public function afterTaskQueued();
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/**
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* Returns the task associated with the task handler.
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*
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* @return array
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* The task (queue item) array.
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*/
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public function getTask();
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}
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