function enter($data = null)
{
// who will be first?
$iAmFirst = false;
try {
$this->zookeeper->create($this->path);
$iAmFirst = true;
} catch (Scalr_Service_Zookeeper_Exception $e) {
if ($e->getCode() != Scalr_Service_Zookeeper_Exception::CONFLICT) {
throw $e;
}
}
// create child node
$this->zookeeper->create("{$this->path}/n", $data ? serialize($data) : null, array(Scalr_Service_Zookeeper::OPT_SEQUENCE => true));
// wait while all nodes will enter barrier
try {
while ($this->timeout && !$this->timeout->reached() || !$this->timeout) {
if ($iAmFirst && $this->capacity() >= $this->quorum || !$iAmFirst && !$this->zookeeper->exists($this->path)) {
break;
} else {
Scalr_Util_Timeout::sleep(100);
}
}
} catch (Exception $e) {
// Finally delete barrier znode
if ($this->autoDelete) {
$this->delete();
}
throw $e;
}
if ($this->autoDelete) {
$this->delete();
}
}
protected function init()
{
if (!$this->initialized) {
if (!$this->zookeeper->exists($this->path)) {
$this->zookeeper->create($this->path);
}
$this->initialized = true;
}
}
protected function init()
{
if (!$this->initialized) {
if (!$this->zookeeper->exists($this->path)) {
$this->zookeeper->setOrCreate($this->path, "", false);
}
$this->initialized = true;
}
}
