/**
* Notify the ChronologyProtector that the LoadBalancer is about to shut
* down. Saves replication positions.
*
* @param LoadBalancer $lb
* @return void
*/
public function shutdownLB(LoadBalancer $lb)
{
if (!$this->enabled || $lb->getServerCount() <= 1) {
return;
// non-replicated setup or disabled
}
$info = $lb->parentInfo();
$masterName = $lb->getServerName($lb->getWriterIndex());
// Only save the position if writes have been done on the connection
$db = $lb->getAnyOpenConnection($lb->getWriterIndex());
if (!$db || !$db->doneWrites()) {
wfDebugLog('replication', __METHOD__ . ": LB {$info['id']}, no writes done\n");
return;
// nothing to do
}
$pos = $db->getMasterPos();
wfDebugLog('replication', __METHOD__ . ": LB {$info['id']} has master pos {$pos}\n");
$this->shutdownPositions[$masterName] = $pos;
}
private function getLagTimeCacheKey()
{
$writerIndex = $this->parent->getWriterIndex();
// Lag is per-server, not per-DB, so key on the master DB name
return $this->srvCache->makeGlobalKey('lag-times', $this->parent->getServerName($writerIndex));
}
