Package org.apache.zookeeper.server

Interface NodeHashMap

All Known Implementing Classes:

NodeHashMapImpl

public interface NodeHashMap

The interface defined to manage the hash based on the entries in the nodes map.

Method Summary

Modifier and Type	Method	Description
void	clear()	Clear all the items stored inside this map.
Set<Map.Entry<String,DataNode>>	entrySet()	Return all the entries inside this map.
DataNode	get(String path)	Return the data node associated with the path.
long	getDigest()	Return the digest value.
void	postChange(String path, DataNode node)	Called after making the changes on the node, which will update the digest.
void	preChange(String path, DataNode node)	Called before we made the change on the node, which will clear the digest associated with it.
DataNode	put(String path, DataNode node)	Add the node into the map and update the digest with the new node.
DataNode	putWithoutDigest(String path, DataNode node)	Add the node into the map without update the digest.
DataNode	remove(String path)	Remove the path from the internal nodes map.
int	size()	Return the size of the nodes stored in this map.

Method Detail

put

DataNode put(String path,
             DataNode node)

Add the node into the map and update the digest with the new node.

Parameters:

path - the path of the node

node - the actual node associated with this path

putWithoutDigest

DataNode putWithoutDigest(String path,
                          DataNode node)

Add the node into the map without update the digest.

Parameters:

path - the path of the node

node - the actual node associated with this path

get

DataNode get(String path)

Return the data node associated with the path.

Parameters:

path - the path to read from

remove

DataNode remove(String path)

Remove the path from the internal nodes map.

Parameters:

path - the path to remove

Returns:

the node being removed

entrySet

Set<Map.Entry<String,DataNode>> entrySet()

Return all the entries inside this map.

clear

void clear()

Clear all the items stored inside this map.

size

int size()

Return the size of the nodes stored in this map.

preChange

void preChange(String path,
               DataNode node)

Called before we made the change on the node, which will clear the digest associated with it.

Parameters:

path - the path being changed

node - the node associated with the path

postChange

void postChange(String path,
                DataNode node)

Called after making the changes on the node, which will update the digest.

Parameters:

path - the path being changed

node - the node associated with the path

getDigest

long getDigest()

Return the digest value.