ch.cern

Class ZKTree

java.lang.Object

ch.cern.ZKTree

public class ZKTree
extends Object

Class that handles operations on the ZNode tree structure.

Constructor Summary

Constructors

Constructor and Description
ZKTree(ZKClient zk) Create a ZKTree instance for traversal and query execution.

Method Summary

Modifier and Type	Method and Description
String	colorCodeExplanation() Return color code explanation for command line output.
void	queryFind(String rootPath, List<ZKQueryElement> queryElements, Hashtable<Integer,List<String>> queriesOutput) Function to return a list of the selected sub-tree with the full path of query matching nodes.
void	queryTree(String rootPath, List<ZKQueryElement> queryElements, Hashtable<Integer,List<String>> queriesOutput) Function to return a tree view of the selected sub-tree and execute queries.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZKTree

public ZKTree(ZKClient zk)

Create a ZKTree instance for traversal and query execution.

Parameters:

zk - A ZooKeeper instance that provides access to the ZNode tree

Method Detail

queryTree

public void queryTree(String rootPath,
                      List<ZKQueryElement> queryElements,
                      Hashtable<Integer,List<String>> queriesOutput)
               throws org.apache.zookeeper.KeeperException,
                      InterruptedException,
                      NoSuchMethodException,
                      SecurityException,
                      IllegalAccessException,
                      IllegalArgumentException,
                      InvocationTargetException,
                      NoSuchFieldException

Function to return a tree view of the selected sub-tree and execute queries.

Parameters:

rootPath - Path to start recursive query execution from

queryElements - List of queries to be executed on each node

queriesOutput - Output buffers for each query

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

SecurityException

NoSuchMethodException

InvocationTargetException

IllegalArgumentException

IllegalAccessException

NoSuchFieldException

queryFind

public void queryFind(String rootPath,
                      List<ZKQueryElement> queryElements,
                      Hashtable<Integer,List<String>> queriesOutput)
               throws org.apache.zookeeper.KeeperException,
                      InterruptedException,
                      NoSuchMethodException,
                      SecurityException,
                      IllegalAccessException,
                      IllegalArgumentException,
                      InvocationTargetException,
                      NoSuchFieldException

Function to return a list of the selected sub-tree with the full path of query matching nodes.

Parameters:

rootPath - Path to start recursive query execution from

queryElements - List of queries to be executed on each node

queriesOutput - Output buffers for each query

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

SecurityException

NoSuchMethodException

InvocationTargetException

IllegalArgumentException

IllegalAccessException

NoSuchFieldException

colorCodeExplanation

public String colorCodeExplanation()

Return color code explanation for command line output.

Returns:

Hint for colors used in tree representation