function release()
{
try {
$this->zookeeper->delete($this->path);
} catch (Scalr_Service_Zookeeper_Exception $e) {
if ($e->getCode() != Scalr_Service_Zookeeper_Exception::NOT_FOUND) {
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;
}
}
function peek()
{
$this->init();
do {
// Fetch path child nodes
if (!$this->children) {
//$this->logger->debug("Getting queue path child nodes");
if ($this->blocking) {
$start = microtime(true);
try {
do {
$childData = $this->zookeeper->getChildren($this->path);
$loop = !$childData->children && ($this->blockingTimeout && !Scalr_Util_Timeout::reached($this->blockingTimeout, $start) || !$this->blockingTimeout);
} while ($loop);
} catch (Scalr_Util_TimeoutException $e) {
return null;
}
} else {
$childData = $this->zookeeper->getChildren($this->path);
}
if ($childData->children) {
sort($childData->children);
$this->children = $childData->children;
} else {
$this->logger->debug("Queue is empty");
if (!$this->blocking) {
return null;
}
}
}
$this->logger->debug("Children capacity: " . count($this->children));
while ($childName = array_shift($this->children)) {
try {
$statData = $this->zookeeper->get("{$this->path}/{$childName}");
$this->zookeeper->delete("{$this->path}/{$childName}");
$this->logger->info("Peeked {$this->path}/{$childName} from queue");
return base64_decode($statData->data64);
} catch (Exception $wasDeleted) {
// Continue loop
$this->logger->debug(sprintf("Got error while delete node %s. " . "I think it was processed by another client", "{$this->path}/{$childName}"));
}
}
} while (!$this->children);
}
private function setStatus($status)
{
if ($status != self::STATUS_NOTSET) {
try {
$this->zookeeper->set("{$this->path}/status", serialize($status));
} catch (Scalr_Service_Zookeeper_Exception $e) {
if ($e->getCode() == Scalr_Service_Zookeeper_Exception::NOT_FOUND) {
$this->zookeeper->create("{$this->path}/status", serialize($status));
return;
}
throw $e;
}
} else {
try {
$this->zookeeper->delete("{$this->path}/status");
} catch (Scalr_Service_Zookeeper_Exception $ignore) {
}
}
}
function remove($key)
{
$this->zookeeper->delete($this->formatKey($key));
}
