private function getCacheKey(array $serverIndexes)
{
sort($serverIndexes);
// Lag is per-server, not per-DB, so key on the master DB name
return $this->srvCache->makeGlobalKey('lag-times', self::VERSION, $this->parent->getServerName($this->parent->getWriterIndex()), implode('-', $serverIndexes));
}
/**
* Notify the ChronologyProtector that the ILoadBalancer is about to shut
* down. Saves replication positions.
*
* @param ILoadBalancer $lb
* @return void
*/
public function shutdownLB(ILoadBalancer $lb)
{
if (!$this->enabled) {
return;
// not enabled
} elseif (!$lb->hasOrMadeRecentMasterChanges(INF)) {
// Only save the position if writes have been done on the connection
return;
}
$masterName = $lb->getServerName($lb->getWriterIndex());
if ($lb->getServerCount() > 1) {
$pos = $lb->getMasterPos();
$this->logger->info(__METHOD__ . ": LB for '{$masterName}' has pos {$pos}\n");
$this->shutdownPositions[$masterName] = $pos;
} else {
$this->logger->info(__METHOD__ . ": DB '{$masterName}' touched\n");
}
$this->shutdownTouchDBs[$masterName] = 1;
}