org.apache.zookeeper.server
Class DataNode

java.lang.Object
  org.apache.zookeeper.server.DataNode

All Implemented Interfaces:

Record

public class DataNode
extends Object
implements Record

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.

Field Summary

org.apache.zookeeper.data.StatPersisted

stat the stat for this node that is persisted to disk.

Constructor Summary

DataNode(DataNode parent, byte[] data, Long acl, org.apache.zookeeper.data.StatPersisted stat)
create a DataNode with parent, data, acls and stat

Method Summary

void	copyStat(org.apache.zookeeper.data.Stat to)
void	deserialize(InputArchive archive, String tag)
Set<String>	getChildren() convenience methods to get the children
void	serialize(OutputArchive archive, String tag)
void	setChildren(HashSet<String> children) convenience method for creating DataNode fully

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

stat

public org.apache.zookeeper.data.StatPersisted stat

the stat for this node that is persisted to disk.

Constructor Detail

DataNode

public DataNode(DataNode parent,
                byte[] data,
                Long acl,
                org.apache.zookeeper.data.StatPersisted stat)

create a DataNode with parent, data, acls and stat

Parameters:

parent - the parent of this DataNode

data - the data to be set

acl - the acls for this node

stat - the stat for this node.

Method Detail

setChildren

public void setChildren(HashSet<String> children)

convenience method for creating DataNode fully

Parameters:

children -

getChildren

public Set<String> getChildren()

convenience methods to get the children

Returns:

the children of this datanode

copyStat

public void copyStat(org.apache.zookeeper.data.Stat to)

deserialize

public void deserialize(InputArchive archive,
                        String tag)
                 throws IOException

Specified by:

deserialize in interface Record

Throws:

IOException

serialize

public void serialize(OutputArchive archive,
                      String tag)
               throws IOException

Specified by:

serialize in interface Record

Throws:

IOException