org.apache.hadoop.hbase.zookeeper
Class ZKTable

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

@InterfaceAudience.Private
public class ZKTable
extends Object

Helper class for table state tracking for use by AssignmentManager. Reads, caches and sets state up in zookeeper. If multiple read/write clients, will make for confusion. Read-only clients other than AssignmentManager interested in learning table state can use the read-only utility methods in ZKTableReadOnly.

To save on trips to the zookeeper ensemble, internally we cache table state.

Constructor Summary

ZKTable(ZooKeeperWatcher zkw)

Method Summary

boolean	checkAndSetEnablingTable(TableName tableName) Sets the specified table as ENABLING in zookeeper atomically If the table is already in ENABLING state, no operation is performed
boolean	checkDisabledAndSetEnablingTable(TableName tableName) Sets the specified table as ENABLING in zookeeper atomically If the table isn't in DISABLED state, no operation is performed
boolean	checkEnabledAndSetDisablingTable(TableName tableName) Sets the specified table as DISABLING in zookeeper atomically If the table isn't in ENABLED state, no operation is performed
static Set<TableName>	getDisabledOrDisablingTables(ZooKeeperWatcher zkw) Gets a list of all the tables set as disabled in zookeeper.
Set<TableName>	getDisabledTables() 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>	getDisablingTables(ZooKeeperWatcher zkw) Gets a list of all the tables set as disabling in zookeeper.
static Set<TableName>	getEnablingTables(ZooKeeperWatcher zkw) Gets a list of all the tables set as enabling in zookeeper.
boolean	isDisabledOrEnablingTable(TableName tableName)
boolean	isDisabledTable(TableName tableName)
boolean	isDisablingOrDisabledTable(TableName tableName)
boolean	isDisablingTable(TableName tableName)
boolean	isEnabledOrDisablingTable(TableName tableName)
boolean	isEnabledTable(TableName tableName)
boolean	isEnablingTable(TableName tableName)
boolean	isTablePresent(TableName tableName) check if table is present .
void	removeEnablingTable(TableName tableName, boolean deleteZNode) If the table is found in ENABLING state the inmemory state is removed.
void	setDeletedTable(TableName tableName) Deletes the table in zookeeper.
void	setDisabledTable(TableName tableName) Sets the specified table as DISABLED in zookeeper.
void	setDisablingTable(TableName tableName) Sets the specified table as DISABLING in zookeeper.
void	setEnabledTable(TableName tableName) Sets the ENABLED state in the cache and creates or force updates a node to ENABLED state for the specified table
void	setEnablingTable(TableName tableName) Sets the specified table as ENABLING in zookeeper.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZKTable

public ZKTable(ZooKeeperWatcher zkw)
        throws org.apache.zookeeper.KeeperException

Throws:

org.apache.zookeeper.KeeperException

Method Detail

setDisabledTable

public void setDisabledTable(TableName tableName)
                      throws org.apache.zookeeper.KeeperException

Sets the specified table as DISABLED in zookeeper. Fails silently if the table is already disabled in zookeeper. Sets no watches.

Parameters:

tableName -

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

setDisablingTable

public void setDisablingTable(TableName tableName)
                       throws org.apache.zookeeper.KeeperException

Sets the specified table as DISABLING in zookeeper. Fails silently if the table is already disabled in zookeeper. Sets no watches.

Parameters:

tableName -

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

setEnablingTable

public void setEnablingTable(TableName tableName)
                      throws org.apache.zookeeper.KeeperException

Sets the specified table as ENABLING in zookeeper. Fails silently if the table is already disabled in zookeeper. Sets no watches.

Parameters:

tableName -

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

checkAndSetEnablingTable

public boolean checkAndSetEnablingTable(TableName tableName)
                                 throws org.apache.zookeeper.KeeperException

Sets the specified table as ENABLING in zookeeper atomically If the table is already in ENABLING state, no operation is performed

Parameters:

tableName -

Returns:

if the operation succeeds or not

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

checkDisabledAndSetEnablingTable

public boolean checkDisabledAndSetEnablingTable(TableName tableName)
                                         throws org.apache.zookeeper.KeeperException

Sets the specified table as ENABLING in zookeeper atomically If the table isn't in DISABLED state, no operation is performed

Parameters:

tableName -

Returns:

if the operation succeeds or not

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

checkEnabledAndSetDisablingTable

public boolean checkEnabledAndSetDisablingTable(TableName tableName)
                                         throws org.apache.zookeeper.KeeperException

Sets the specified table as DISABLING in zookeeper atomically If the table isn't in ENABLED state, no operation is performed

Parameters:

tableName -

Returns:

if the operation succeeds or not

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

isDisabledTable

public boolean isDisabledTable(TableName tableName)

isDisablingTable

public boolean isDisablingTable(TableName tableName)

isEnablingTable

public boolean isEnablingTable(TableName tableName)

isEnabledTable

public boolean isEnabledTable(TableName tableName)

isDisablingOrDisabledTable

public boolean isDisablingOrDisabledTable(TableName tableName)

isEnabledOrDisablingTable

public boolean isEnabledOrDisablingTable(TableName tableName)

isDisabledOrEnablingTable

public boolean isDisabledOrEnablingTable(TableName tableName)

setDeletedTable

public void setDeletedTable(TableName tableName)
                     throws org.apache.zookeeper.KeeperException

Deletes the table in zookeeper. Fails silently if the table is not currently disabled in zookeeper. Sets no watches.

Parameters:

tableName -

Throws:

org.apache.zookeeper.KeeperException - unexpected zookeeper exception

setEnabledTable

public void setEnabledTable(TableName tableName)
                     throws org.apache.zookeeper.KeeperException

Sets the ENABLED state in the cache and creates or force updates a node to ENABLED state for the specified table

Parameters:

tableName -

Throws:

org.apache.zookeeper.KeeperException

isTablePresent

public boolean isTablePresent(TableName tableName)

check if table is present .

Parameters:

tableName -

Returns:

true if the table is present

getDisabledTables

public Set<TableName> getDisabledTables()

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

Returns:

Set of disabled tables, empty Set if none

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

getDisablingTables

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

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

Returns:

Set of disabling tables, empty Set if none

Throws:

org.apache.zookeeper.KeeperException

getEnablingTables

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

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

Returns:

Set of enabling 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

removeEnablingTable

public void removeEnablingTable(TableName tableName,
                                boolean deleteZNode)
                         throws org.apache.zookeeper.KeeperException

If the table is found in ENABLING state the inmemory state is removed. This helps in cases where CreateTable is to be retried by the client incase of failures. If deleteZNode is true - the znode is also deleted

Parameters:

tableName -

deleteZNode -

Throws:

org.apache.zookeeper.KeeperException