Examples of org.apache.zookeeper_voltpatches.server.DataNode

Package org.apache.zookeeper_voltpatches.server

Examples of org.apache.zookeeper_voltpatches.server.DataNode

org.apache.zookeeper_voltpatches.server.DataNode
This class contains the data for a node in the data tree.
A data node contains a reference to its parent, a byte array as its data, an array of ACLs, a stat object, and a set of its children's paths.

     * @return size of the data
     */
    public long approximateDataSize() {
        long result = 0;
        for (Map.Entry<String, DataNode> entry : nodes.entrySet()) {
            DataNode value = entry.getValue();
            synchronized (value) {
                result += entry.getKey().length();
                result += (value.data == null ? 0
                        : value.data.length);
            }

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     * @param diff
     *            the diff to be added to the count
     */
    public void updateCount(String lastPrefix, int diff) {
        String statNode = Quotas.statPath(lastPrefix);
        DataNode node = nodes.get(statNode);
        StatsTrack updatedStat = null;
        if (node == null) {
            // should not happen
            LOG.error("Missing count node for stat " + statNode);
            return;

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     * @throws IOException
     *             if path is not found
     */
    public void updateBytes(String lastPrefix, long diff) {
        String statNode = Quotas.statPath(lastPrefix);
        DataNode node = nodes.get(statNode);
        if (node == null) {
            // should never be null but just to make
            // findbugs happy
            LOG.error("Missing stat node for bytes " + statNode);
            return;

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        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) {
            Set<String> children = parent.getChildren();
            if (children != null) {
                if (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.addChild(childName);
            nodes.put(path, child);
            if (ephemeralOwner != 0) {
                HashSet<String> list = ephemerals.get(ephemeralOwner);
                if (list == null) {

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    public void deleteNode(String path, long zxid)
            throws KeeperException.NoNodeException {
        int lastSlash = path.lastIndexOf('/');
        String parentName = path.substring(0, lastSlash);
        String childName = path.substring(lastSlash + 1);
        DataNode node = nodes.get(path);
        if (node == null) {
            throw new KeeperException.NoNodeException();
        }
        nodes.remove(path);
        DataNode parent = nodes.get(parentName);
        if (parent == null) {
            throw new KeeperException.NoNodeException();
        }
        synchronized (parent) {
            parent.removeChild(childName);
            parent.stat.setCversion(parent.stat.getCversion() + 1);
            parent.stat.setPzxid(zxid);
            long eowner = node.stat.getEphemeralOwner();
            if (eowner != 0) {
                HashSet<String> nodes = ephemerals.get(eowner);

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    }


    public Stat setData(String path, byte data[], int version, long zxid,
            long time) throws KeeperException.NoNodeException {
        Stat s = new Stat();
        DataNode n = nodes.get(path);
        if (n == null) {
            throw new KeeperException.NoNodeException();
        }
        byte lastdata[] = null;
        synchronized (n) {
            lastdata = n.data;
            n.data = data;
            n.stat.setMtime(time);
            n.stat.setMzxid(zxid);
            n.stat.setVersion(version);
            n.copyStat(s);
        }
        // now update if the path is in a quota subtree.
        String lastPrefix = pTrie.findMaxPrefix(path);
        // do nothing for the root.
        // we are not keeping a quota on the zookeeper

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        return s;
    }


    public byte[] getData(String path, Stat stat, Watcher watcher)
            throws KeeperException.NoNodeException {
        DataNode n = nodes.get(path);
        if (n == null) {
            throw new KeeperException.NoNodeException();
        }
        synchronized (n) {
            n.copyStat(stat);
            if (watcher != null) {
                dataWatches.addWatch(path, watcher);
            }
            return n.data;
        }

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    }


    public Stat statNode(String path, Watcher watcher)
            throws KeeperException.NoNodeException {
        Stat stat = new Stat();
        DataNode n = nodes.get(path);
        if (watcher != null) {
            dataWatches.addWatch(path, watcher);
        }
        if (n == null) {
            throw new KeeperException.NoNodeException();
        }
        synchronized (n) {
            n.copyStat(stat);
            return stat;
        }
    }

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        }
    }


    public List<String> getChildren(String path, Stat stat, Watcher watcher)
            throws KeeperException.NoNodeException {
        DataNode n = nodes.get(path);
        if (n == null) {
            throw new KeeperException.NoNodeException();
        }
        synchronized (n) {
            if (stat != null) {
                n.copyStat(stat);
            }
            ArrayList<String> children;
            Set<String> childs = n.getChildren();
            if (childs != null) {
                children = new ArrayList<String>(childs.size());
                children.addAll(childs);
            } else {
                children = new ArrayList<String>(0);

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    }


    public Stat setACL(String path, List<ACL> acl, int version)
            throws KeeperException.NoNodeException {
        Stat stat = new Stat();
        DataNode n = nodes.get(path);
        if (n == null) {
            throw new KeeperException.NoNodeException();
        }
        synchronized (n) {
            n.stat.setAversion(version);
            n.acl = convertAcls(acl);
            n.copyStat(stat);
            return stat;
        }
    }

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Related Classes of org.apache.zookeeper_voltpatches.server.DataNode

org.apache.zookeeper_voltpatches.data.StatPersisted

org.apache.zookeeper_voltpatches.server.DataTree

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