org.apache.hadoop.hbase.zookeeper

类 ZKTableStateManager

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKTableStateManager

所有已实现的接口:

TableStateManager

@InterfaceAudience.Private
public class ZKTableStateManager
extends Object
implements TableStateManager

Implementation of TableStateManager which reads, caches and sets state up in ZooKeeper. If multiple read/write clients, will make for confusion. Code running on client side without consensus context should use ZKTableStateClientSideReader instead.

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

构造器概要

构造器

构造器和说明
ZKTableStateManager(ZooKeeperWatcher zkw)

方法概要

方法

限定符和类型	方法和说明
void	checkAndRemoveTableState(TableName tableName, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State states, boolean deletePermanentState) If the table is found in the given state the in-memory state is removed.
Set<TableName>	getTablesInStates(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states) Gets a list of all the tables set as disabling in zookeeper.
boolean	isTablePresent(TableName tableName) check if table is present.
boolean	isTableState(TableName tableName, boolean checkSource, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states) Checks if table is marked in specified state in ZK.
boolean	isTableState(TableName tableName, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states) Checks if table is marked in specified state in ZK (using cache only).
void	setDeletedTable(TableName tableName) Deletes the table in zookeeper.
void	setTableState(TableName tableName, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State state) Sets table state in ZK.
boolean	setTableStateIfInStates(TableName tableName, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State newState, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states) Checks and sets table state in ZK.
boolean	setTableStateIfNotInStates(TableName tableName, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State newState, org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states) Checks and sets table state in ZK.

从类继承的方法 java.lang.Object

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

构造器详细资料

ZKTableStateManager

public ZKTableStateManager(ZooKeeperWatcher zkw)
                    throws org.apache.zookeeper.KeeperException,
                           InterruptedException

抛出:

org.apache.zookeeper.KeeperException

InterruptedException

方法详细资料

setTableState

public void setTableState(TableName tableName,
                 org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State state)
                   throws CoordinatedStateException

Sets table state in ZK. Sets no watches. Sets the table into desired state. Fails silently if the table is already in this state.

指定者:

setTableState 在接口中 TableStateManager

参数:

tableName - table to process

state - new state of this table

抛出:

CoordinatedStateException - if error happened when trying to set table state

setTableStateIfInStates

public boolean setTableStateIfInStates(TableName tableName,
                              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State newState,
                              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states)
                                throws CoordinatedStateException

Checks and sets table state in ZK. Sets no watches. Sets the specified table into the newState, but only if the table is already in one of the possibleCurrentStates (otherwise no operation is performed).

指定者:

setTableStateIfInStates 在接口中 TableStateManager

参数:

tableName - table to process

newState - new state for the table

states - table should be in one of these states for the operation to be performed

返回:

true if operation succeeded, false otherwise

抛出:

CoordinatedStateException - if error happened while performing operation

setTableStateIfNotInStates

public boolean setTableStateIfNotInStates(TableName tableName,
                                 org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State newState,
                                 org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states)
                                   throws CoordinatedStateException

Checks and sets table state in ZK. Sets no watches. Sets the specified table into the newState, but only if the table is NOT in one of the possibleCurrentStates (otherwise no operation is performed).

指定者:

setTableStateIfNotInStates 在接口中 TableStateManager

参数:

tableName - table to process

newState - new state for the table

states - table should NOT be in one of these states for the operation to be performed

返回:

true if operation succeeded, false otherwise

抛出:

CoordinatedStateException - if error happened while performing operation

isTableState

public boolean isTableState(TableName tableName,
                   org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states)

Checks if table is marked in specified state in ZK (using cache only).

指定者:

isTableState 在接口中 TableStateManager

返回:

true if the table is in any one of the listed states, false otherwise.

isTableState

public boolean isTableState(TableName tableName,
                   boolean checkSource,
                   org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states)

Checks if table is marked in specified state in ZK.

指定者:

isTableState 在接口中 TableStateManager

返回:

true if the table is in any one of the listed states, false otherwise.

setDeletedTable

public void setDeletedTable(TableName tableName)
                     throws CoordinatedStateException

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

指定者:

setDeletedTable 在接口中 TableStateManager

参数:

tableName - table to be deleted

抛出:

CoordinatedStateException - if error happened while performing operation

isTablePresent

public boolean isTablePresent(TableName tableName)

check if table is present.

指定者:

isTablePresent 在接口中 TableStateManager

参数:

tableName - table we're working on

返回:

true if the table is present

getTablesInStates

public Set<TableName> getTablesInStates(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State... states)
                                 throws InterruptedIOException,
                                        CoordinatedStateException

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

指定者:

getTablesInStates 在接口中 TableStateManager

返回:

Set of disabling tables, empty Set if none

抛出:

CoordinatedStateException - if error happened in underlying coordination engine

InterruptedIOException

checkAndRemoveTableState

public void checkAndRemoveTableState(TableName tableName,
                            org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Table.State states,
                            boolean deletePermanentState)
                              throws CoordinatedStateException

If the table is found in the given state the in-memory state is removed. This helps in cases where CreateTable is to be retried by the client in case of failures. If deletePermanentState is true - the flag kept permanently is also reset.

指定者:

checkAndRemoveTableState 在接口中 TableStateManager

参数:

tableName - table we're working on

states - if table isn't in any one of these states, operation aborts

deletePermanentState - if true, reset the permanent flag

抛出:

CoordinatedStateException - if error happened in underlying coordination engine