/**
* this method traverses the quota path and update the path trie and sets
*
* @param path
*/
private void traverseNode(String path) {
DataNode node = getNode(path);
String children[] = null;
synchronized (node) {
children = node.children.toArray(new String[node.children.size()]);
}
if (children.length == 0) {
// this node does not have a child
// is the leaf node
// check if its the leaf node
String endString = "/" + Quotas.limitNode;
if (path.endsWith(endString)) {
// ok this is the limit node
// get the real node and update
// the count and the bytes
String realPath = path.substring(Quotas.quotaZookeeper.length(), path.indexOf(endString));
updateQuotaForPath(realPath);
this.pTrie.addPath(realPath);
}
return;
}
for (String child : children) {
traverseNode(path + "/" + child);
}
}
/**
* @param path
* @param data
* @param acl
* @param ephemeralOwner the session id that owns this node. -1 indicates this is not an ephemeral
* node.
* @param zxid
* @param time
* @return the patch of the created node
* @throws KeeperException
*/
public String createNode(
String path, byte data[], List<ACL> acl, long ephemeralOwner, long zxid, long time)
throws KeeperException.NoNodeException, KeeperException.NodeExistsException {
int lastSlash = path.lastIndexOf('/');
String parentName = path.substring(0, lastSlash);
String childName = path.substring(lastSlash + 1);
StatPersisted stat = new StatPersisted();
stat.setCtime(time);
stat.setMtime(time);
stat.setCzxid(zxid);
stat.setMzxid(zxid);
stat.setPzxid(zxid);
stat.setVersion(0);
stat.setAversion(0);
stat.setEphemeralOwner(ephemeralOwner);
DataNode parent = nodes.get(parentName);
if (parent == null) {
throw new KeeperException.NoNodeException();
}
synchronized (parent) {
if (parent.children.contains(childName)) {
throw new KeeperException.NodeExistsException();
}
int cver = parent.stat.getCversion();
cver++;
parent.stat.setCversion(cver);
parent.stat.setPzxid(zxid);
Long longval = convertAcls(acl);
DataNode child = new DataNode(parent, data, longval, stat);
parent.children.add(childName);
nodes.put(path, child);
if (ephemeralOwner != 0) {
HashSet<String> list = ephemerals.get(ephemeralOwner);
if (list == null) {
list = new HashSet<String>();
ephemerals.put(ephemeralOwner, list);
}
synchronized (list) {
list.add(path);
}
}
}
// now check if its one of the zookeeper node child
if (parentName.startsWith(quotaZookeeper)) {
// now check if its the limit node
if (Quotas.limitNode.equals(childName)) {
// this is the limit node
// get the parent and add it to the trie
pTrie.addPath(parentName.substring(quotaZookeeper.length()));
}
if (Quotas.statNode.equals(childName)) {
updateQuotaForPath(parentName.substring(quotaZookeeper.length()));
}
}
// also check to update the quotas for this node
String lastPrefix = pTrie.findMaxPrefix(path);
if (!rootZookeeper.equals(lastPrefix) && !("".equals(lastPrefix))) {
// ok we have some match and need to update
updateCount(lastPrefix, 1);
updateBytes(lastPrefix, data == null ? 0 : data.length);
}
dataWatches.triggerWatch(path, Event.EventType.NodeCreated);
childWatches.triggerWatch(
parentName.equals("") ? "/" : parentName, Event.EventType.NodeChildrenChanged);
return path;
}