org.apache.hadoop.hbase.zookeeper
Class ZKTableReadOnly

java.lang.Object
  org.apache.hadoop.hbase.zookeeper.ZKTableReadOnly

@InterfaceAudience.Private
public class ZKTableReadOnly
extends Object

Non-instantiable class that provides helper functions for clients other than AssignmentManager for reading the state of a table in ZK.

Does not cache state like ZKTable, actually reads from ZK each call.

Method Summary

static Set<TableName>	getDisabledOrDisablingTables(ZooKeeperWatcher zkw) Gets a list of all the tables set as disabled in zookeeper.
static Set<TableName>	getDisabledTables(ZooKeeperWatcher zkw) Gets a list of all the tables set as disabled in zookeeper.
static boolean	isDisabledTable(ZooKeeperWatcher zkw, TableName tableName) Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#DISABLED.
static boolean	isDisablingOrDisabledTable(ZooKeeperWatcher zkw, TableName tableName) Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#DISABLING of ZooKeeperProtos.Table.State#DISABLED.
static boolean	isEnabledTable(ZooKeeperWatcher zkw, TableName tableName) Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#ENABLED.

Methods inherited from class java.lang.Object

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

Method Detail

isDisabledTable

public static boolean isDisabledTable(ZooKeeperWatcher zkw,
                                      TableName tableName)
                               throws org.apache.zookeeper.KeeperException

Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#DISABLED. This method does not use cache. This method is for clients other than AssignmentManager

Parameters:

zkw -

tableName -

Returns:

True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

isEnabledTable

public static boolean isEnabledTable(ZooKeeperWatcher zkw,
                                     TableName tableName)
                              throws org.apache.zookeeper.KeeperException

Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#ENABLED. This method does not use cache. This method is for clients other than AssignmentManager

Parameters:

zkw -

tableName -

Returns:

True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

isDisablingOrDisabledTable

public static boolean isDisablingOrDisabledTable(ZooKeeperWatcher zkw,
                                                 TableName tableName)
                                          throws org.apache.zookeeper.KeeperException

Go to zookeeper and see if state of table is ZooKeeperProtos.Table.State#DISABLING of ZooKeeperProtos.Table.State#DISABLED. This method does not use cache. This method is for clients other than AssignmentManager.

Parameters:

zkw -

tableName -

Returns:

True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

getDisabledTables

public static Set<TableName> getDisabledTables(ZooKeeperWatcher zkw)
                                        throws org.apache.zookeeper.KeeperException

Gets a list of all the tables set as disabled in zookeeper.

Returns:

Set of disabled tables, empty Set if none

Throws:

org.apache.zookeeper.KeeperException

getDisabledOrDisablingTables

public static Set<TableName> getDisabledOrDisablingTables(ZooKeeperWatcher zkw)
                                                   throws org.apache.zookeeper.KeeperException

Gets a list of all the tables set as disabled in zookeeper.

Returns:

Set of disabled tables, empty Set if none

Throws:

org.apache.zookeeper.KeeperException