/**
* Create a new Emitter instance
*
* @param integer $propogation The event propagation behvaiour (\Happen\Eventspace::NONE, \Happen\Eventspace::BUBBLE or \Happen\Eventspace::DESCEND).
*/
public function __construct($propogation = Eventspace::BUBBLE)
{
$this->event_queue = array();
$this->watcher = \EvIdle::createStopped(array($this, 'onIdle'));
$this->propagation = $propogation;
$this->eventspace = new Eventspace();
}
/**
* Called when I\O isn't happening to process RPC queue.
*
* This should only be called by the event loop.
*
* @param \EvIdle $watcher
* @param integer $revents
* @return void
*/
public function _onIdle(\EvIdle $watcher, $revents)
{
// Get the first RPC in the queue.
$rpc = array_shift($this->rpc_queue);
if (!$rpc instanceof Rpc) {
return $watcher->stop();
}
// Make method call.
$method_name = self::ACTION_METHOD_PREFIX . ucfirst(strtolower($rpc->type));
if (method_exists($this, $method_name)) {
$rpc->response = call_user_func(array($this, $method_name), $rpc->name, $rpc->arguments);
}
// Add the data to the output queue to return response to parent process.
$this->response_queue[] = serialize($rpc);
// Make sure the output pipe watcher is runnning to dump queue contents.
if (!$this->watchers[1]->is_active) {
$this->watchers[1]->start();
}
return true;
}
