ZKTableStateClientSideReader (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.zookeeper.ZKTableStateClientSideReader

```
@InterfaceAudience.Private
public class ZKTableStateClientSideReader
extends Object
```
Non-instantiable class that provides helper functions to learn about HBase table state for code running on client side (hence, not having access to consensus context). Doesn't cache any table state, just goes directly to ZooKeeper. TODO: decouple this class from ZooKeeper.

Method Summary

Methods
Modifier and Type	Method and Description
`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 Set<TableName>`	`getEnablingTables(ZooKeeperWatcher zkw)` Gets a list of all the tables set as enabling 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,
                                      InterruptedException
```
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 - ZooKeeperWatcher instance to use
tableName - table we're checking

Returns:
True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

isEnabledTable
```
public static boolean isEnabledTable(ZooKeeperWatcher zkw,
                     TableName tableName)
                              throws org.apache.zookeeper.KeeperException,
                                     InterruptedException
```
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 - ZooKeeperWatcher instance to use
tableName - table we're checking

Returns:
True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

isDisablingOrDisabledTable
```
public static boolean isDisablingOrDisabledTable(ZooKeeperWatcher zkw,
                                 TableName tableName)
                                          throws org.apache.zookeeper.KeeperException,
                                                 InterruptedException
```
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 - ZooKeeperWatcher instance to use
tableName - table we're checking

Returns:
True if table is enabled.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

getDisabledTables

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

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; InterruptedException

getDisabledOrDisablingTables

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

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; InterruptedException

getEnablingTables

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

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

Parameters:: zkw - ZooKeeperWatcher instance to use
Returns:: Set of enabling tables, empty Set if none
Throws:: org.apache.zookeeper.KeeperException; InterruptedException

Class ZKTableStateClientSideReader

Method Summary

Methods inherited from class java.lang.Object

Method Detail

isDisabledTable

isEnabledTable

isDisablingOrDisabledTable

getDisabledTables

getDisabledOrDisablingTables

getEnablingTables