Package org.apache.zookeeper.server.upgrade

Class DataTreeV1

java.lang.Object

org.apache.zookeeper.server.upgrade.DataTreeV1

public class DataTreeV1
extends java.lang.Object

This class maintains the tree data structure. It doesn't have any networking or client connection code in it so that it can be tested in a stand alone way.

The tree maintains two parallel data structures: a hashtable that maps from full paths to DataNodes and a tree of DataNodes. All accesses to a path is through the hashtable. The tree is traversed only when serializing to disk.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DataTreeV1.ProcessTxnResult

Field Summary

Fields

Modifier and Type	Field	Description
boolean	initialized
long	lastProcessedZxid

Constructor Summary

Constructors

Constructor	Description
DataTreeV1()

Method Summary

Modifier and Type	Method	Description
void	clear()
static void	copyStat(Stat from, Stat to)
static void	copyStatPersisted(StatPersistedV1 from, StatPersistedV1 to)
java.lang.String	createNode(java.lang.String path, byte[] data, java.util.List<ACL> acl, long ephemeralOwner, long zxid, long time)
void	deleteNode(java.lang.String path)
void	deserialize(org.apache.jute.InputArchive ia, java.lang.String tag)
java.lang.String	dumpEphemerals()
java.util.List<ACL>	getACL(java.lang.String path, Stat stat)
java.util.ArrayList<java.lang.String>	getChildren(java.lang.String path, Stat stat, Watcher watcher)
byte[]	getData(java.lang.String path, Stat stat, Watcher watcher)
java.util.HashSet<java.lang.String>	getEphemerals(long sessionId)
java.util.Map<java.lang.Long,java.util.HashSet<java.lang.String>>	getEphemeralsMap()	return the ephemerals for this tree
DataNodeV1	getNode(java.lang.String path)
java.util.Collection<java.lang.Long>	getSessions()
DataTreeV1.ProcessTxnResult	processTxn(TxnHeader header, org.apache.jute.Record txn)
void	removeCnxn(Watcher watcher)
void	serialize(org.apache.jute.OutputArchive oa, java.lang.String tag)
Stat	setACL(java.lang.String path, java.util.List<ACL> acl, int version)
Stat	setData(java.lang.String path, byte[] data, int version, long zxid, long time)
void	setEphemeralsMap(java.util.Map<java.lang.Long,java.util.HashSet<java.lang.String>> ephemerals)
Stat	statNode(java.lang.String path, Watcher watcher)

Methods inherited from class java.lang.Object

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

Field Detail

lastProcessedZxid

public volatile long lastProcessedZxid

initialized

public boolean initialized

Constructor Detail

DataTreeV1

public DataTreeV1()

Method Detail

getEphemeralsMap

public java.util.Map<java.lang.Long,java.util.HashSet<java.lang.String>> getEphemeralsMap()

return the ephemerals for this tree

Returns:

the ephemerals for this tree

setEphemeralsMap

public void setEphemeralsMap(java.util.Map<java.lang.Long,java.util.HashSet<java.lang.String>> ephemerals)

getEphemerals

public java.util.HashSet<java.lang.String> getEphemerals(long sessionId)

getSessions

public java.util.Collection<java.lang.Long> getSessions()

getNode

public DataNodeV1 getNode(java.lang.String path)

copyStatPersisted

public static void copyStatPersisted(StatPersistedV1 from,
                                     StatPersistedV1 to)

copyStat

public static void copyStat(Stat from,
                            Stat to)

createNode

public java.lang.String createNode(java.lang.String path,
                                   byte[] data,
                                   java.util.List<ACL> acl,
                                   long ephemeralOwner,
                                   long zxid,
                                   long time)
                            throws KeeperException.NoNodeException,
                                   KeeperException.NodeExistsException

Parameters:

path -

data -

acl -

ephemeralOwner - the session id that owns this node. -1 indicates this is not an ephemeral node.

zxid -

time -

Returns:

the patch of the created node

Throws:

KeeperException

KeeperException.NoNodeException

KeeperException.NodeExistsException

deleteNode

public void deleteNode(java.lang.String path)
                throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

setData

public Stat setData(java.lang.String path,
                    byte[] data,
                    int version,
                    long zxid,
                    long time)
             throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

getData

public byte[] getData(java.lang.String path,
                      Stat stat,
                      Watcher watcher)
               throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

statNode

public Stat statNode(java.lang.String path,
                     Watcher watcher)
              throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

getChildren

public java.util.ArrayList<java.lang.String> getChildren(java.lang.String path,
                                                         Stat stat,
                                                         Watcher watcher)
                                                  throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

setACL

public Stat setACL(java.lang.String path,
                   java.util.List<ACL> acl,
                   int version)
            throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

getACL

public java.util.List<ACL> getACL(java.lang.String path,
                                  Stat stat)
                           throws KeeperException.NoNodeException

Throws:

KeeperException.NoNodeException

processTxn

public DataTreeV1.ProcessTxnResult processTxn(TxnHeader header,
                                              org.apache.jute.Record txn)

serialize

public void serialize(org.apache.jute.OutputArchive oa,
                      java.lang.String tag)
               throws java.io.IOException,
                      java.lang.InterruptedException

Throws:

java.io.IOException

java.lang.InterruptedException

deserialize

public void deserialize(org.apache.jute.InputArchive ia,
                        java.lang.String tag)
                 throws java.io.IOException

Throws:

java.io.IOException

dumpEphemerals

public java.lang.String dumpEphemerals()

removeCnxn

public void removeCnxn(Watcher watcher)

clear

public void clear()