Package org.apache.bookkeeper.meta

Class ZkLayoutManager

java.lang.Object

org.apache.bookkeeper.meta.ZkLayoutManager

All Implemented Interfaces:

LayoutManager

public class ZkLayoutManager
extends java.lang.Object
implements LayoutManager

Provide utils for writing/reading/deleting layout in zookeeper.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.bookkeeper.meta.LayoutManager

LayoutManager.LedgerLayoutExistsException

Constructor Summary

Constructors

Constructor	Description
ZkLayoutManager(org.apache.zookeeper.ZooKeeper zk, java.lang.String ledgersRoot, java.util.List<org.apache.zookeeper.data.ACL> acls)

Method Summary

Modifier and Type	Method	Description
void	deleteLedgerLayout()	Delete the ledger layout from zookeeper.
org.apache.zookeeper.ZooKeeper	getZk()
LedgerLayout	readLedgerLayout()	Read ledger layout from zookeeper.
void	storeLedgerLayout(LedgerLayout layout)	Store the ledger layout to zookeeper.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZkLayoutManager

public ZkLayoutManager(org.apache.zookeeper.ZooKeeper zk,
                       java.lang.String ledgersRoot,
                       java.util.List<org.apache.zookeeper.data.ACL> acls)

Method Detail

getZk

public org.apache.zookeeper.ZooKeeper getZk()

readLedgerLayout

public LedgerLayout readLedgerLayout()
                              throws java.io.IOException

Read ledger layout from zookeeper.

Specified by:

readLedgerLayout in interface LayoutManager

Returns:

ledger layout, or null if none set in zookeeper

Throws:

java.io.IOException - when fail to read ledger layout.

storeLedgerLayout

public void storeLedgerLayout(LedgerLayout layout)
                       throws java.io.IOException

Store the ledger layout to zookeeper.

Specified by:

storeLedgerLayout in interface LayoutManager

Parameters:

layout - ledger layout

Throws:

java.io.IOException - when fail to store ledger layout.

deleteLedgerLayout

public void deleteLedgerLayout()
                        throws java.io.IOException

Delete the ledger layout from zookeeper.

Specified by:

deleteLedgerLayout in interface LayoutManager

Throws:

java.io.IOException