public function add($id, $value, $ttl = null)
{
try {
$this->redis->setnx($id, $value);
if ($ttl) {
$this->redis->expire($id, $ttl);
}
return true;
} catch (Predis\PredisException $e) {
return false;
}
}
/**
* Make sure, the Redis keys exist.
*
* @return void
*/
private function initializeRedis()
{
if ($this->initialized) {
return;
}
$this->hash = substr(sha1(serialize($this->items)), 0, 8);
$positionKey = $this->getKeyForCurrentPosition();
$existing = !$this->redis->setnx($positionKey, count($this->items) - 1);
if (!$existing && count($this->items)) {
$listKey = $this->getKeyForItemList();
$this->itemCount = $this->redis->rpush($listKey, $this->items);
}
$this->initialized = true;
}
public function work()
{
foreach ($this->limits as $index => $limit) {
$counterName = "queue:{$this->tube}:throttle:{$index}";
$started = (bool) $this->redis->setnx($counterName, $limit['requests']);
$counter = $this->redis->get($counterName);
if ($started) {
$this->redis->transaction(function (MultiExec $transaction) use($counterName, $limit) {
$transaction->expire($counterName, $limit['seconds']);
$transaction->decr($counterName);
});
} else {
if ($counter > 1) {
$this->redis->decr($counterName);
} else {
$this->pheanstalk->pauseTube($this->tube, $this->redis->ttl($counterName));
}
}
}
}
private function lockSession($sessionId)
{
$attempts = 1000000 / $this->spinLockWait * $this->lockMaxWait;
$this->lockKey = $sessionId . '.lock';
for ($i = 0; $i < $attempts; $i++) {
$success = $this->redis->setnx($this->prefix . $this->lockKey, '1');
if ($success) {
$this->locked = true;
$this->redis->expire($this->prefix . $this->lockKey, $this->lockMaxWait + 1);
return true;
}
usleep($this->spinLockWait);
}
return false;
}
/**
* Create nonce for server and salt, expiring after
* $Auth_OpenID_SKEW seconds.
*/
function useNonce($server_url, $timestamp, $salt)
{
global $Auth_OpenID_SKEW;
// save one request to memcache when nonce obviously expired
if (abs($timestamp - time()) > $Auth_OpenID_SKEW) {
return false;
}
// SETNX will set the value only of the key doesn't exist yet.
$nonceKey = $this->nonceKey($server_url, $salt);
$added = $this->redis->setnx($nonceKey, "1");
if ($added) {
// Will set expiration
$this->redis->expire($nonceKey, $Auth_OpenID_SKEW);
return true;
} else {
return false;
}
}
