/**
* update the count of bytes of this stat datanode
*
* @param lastPrefix the path of the node that is quotaed
* @param diff the diff to added to number of bytes
*/
public void updateBytes(String lastPrefix, long diff) {
String statNode = Quotas.statPath(lastPrefix);
DataNode node = nodes.get(statNode);
StatsTrack updatedStat = null;
synchronized (node) {
updatedStat = new StatsTrack(new String(node.data));
updatedStat.setBytes(updatedStat.getBytes() + diff);
node.data = updatedStat.toString().getBytes();
}
// now check if the bytes match the quota
String quotaNode = Quotas.quotaPath(lastPrefix);
node = nodes.get(quotaNode);
StatsTrack thisStats = null;
synchronized (node) {
thisStats = new StatsTrack(new String(node.data));
}
if (thisStats.getBytes() < updatedStat.getBytes()) {
LOG.warn(
"Quota exceeded: "
+ lastPrefix
+ " bytes="
+ updatedStat.getBytes()
+ " limit="
+ thisStats.getBytes());
}
}
/**
* update the quota for the given path
*
* @param path the path to be used
*/
private void updateQuotaForPath(String path) {
Counts c = new Counts();
getCounts(path, c);
StatsTrack strack = new StatsTrack();
strack.setBytes(c.bytes);
strack.setCount(c.count);
String statPath = Quotas.quotaZookeeper + path + "/" + Quotas.statNode;
DataNode node = getNode(statPath);
// it should exist
if (node == null) {
LOG.warn("Missing quota stat node " + statPath);
return;
}
synchronized (node) {
node.data = strack.toString().getBytes();
}
}