function initiate($quorum = null)
{
if ($quorum != null) {
$this->originalQuorum = $this->quorum;
$this->quorum = $quorum;
}
try {
$this->zookeeper->create($this->path);
} catch (Scalr_Service_Zookeeper_Exception $ignore) {
}
if (!$this->lock->tryAcquire()) {
throw new Scalr_Service_Zookeeper_InterruptedException("Cannot get exclusive lock on election node. " . "Another election is already initiated");
}
try {
// Delete previous votes
$childInfo = $this->zookeeper->getChildren($this->path);
if ($childInfo->children) {
foreach ($childInfo->children as $childName) {
if (strpos($childName, "n") === 0) {
$this->zookeeper->delete("{$this->path}/{$childName}");
}
}
}
$this->isInitiator = true;
$this->setStatus(self::STATUS_READY);
if ($this->timeout) {
$this->timeout->reset();
}
$this->logger->info(sprintf("Election initiated (quorum: %d, path: %s)", $this->quorum, $this->path));
} catch (Exception $e) {
// Finally release lock
$this->lock->release();
throw $e;
}
}
function clear()
{
$this->init();
$this->lock->acquire();
try {
foreach ($this->itemNames() as $name) {
$this->zookeeper->delete("{$this->path}/{$name}");
}
$this->lock->release();
} catch (Exception $e) {
$this->lock->release();
throw $e;
}
}
