org.apache.hadoop.hbase.master

类 TableLockManager.NullTableLockManager

java.lang.Object

org.apache.hadoop.hbase.master.TableLockManager

org.apache.hadoop.hbase.master.TableLockManager.NullTableLockManager

封闭类:

TableLockManager

@InterfaceAudience.Private
public static class TableLockManager.NullTableLockManager
extends TableLockManager

A null implementation

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.master.TableLockManager

TableLockManager.NullTableLockManager, TableLockManager.TableLock

字段概要

从类继承的字段 org.apache.hadoop.hbase.master.TableLockManager

DEFAULT_TABLE_LOCK_EXPIRE_TIMEOUT_MS, DEFAULT_TABLE_READ_LOCK_TIMEOUT_MS, DEFAULT_TABLE_WRITE_LOCK_TIMEOUT_MS, TABLE_LOCK_ENABLE, TABLE_LOCK_EXPIRE_TIMEOUT, TABLE_READ_LOCK_TIMEOUT_MS, TABLE_WRITE_LOCK_TIMEOUT_MS

构造器概要

构造器

构造器和说明
TableLockManager.NullTableLockManager()

方法概要

方法

限定符和类型	方法和说明
TableLockManager.TableLock	readLock(TableName tableName, String purpose) Returns a TableLock for locking the table for shared access among read-lock holders
void	reapAllExpiredLocks() Force releases all table locks(read and write) that have been held longer than "hbase.table.lock.expire.ms".
void	reapWriteLocks() Force releases table write locks and lock attempts even if this thread does not own the lock.
void	tableDeleted(TableName tableName) Called after a table has been deleted, and after the table lock is released.
void	visitAllLocks(InterProcessLock.MetadataHandler handler) Visits all table locks(read and write), and lock attempts with the given callback MetadataHandler.
TableLockManager.TableLock	writeLock(TableName tableName, String purpose) Returns a TableLock for locking the table for exclusive access

从类继承的方法 org.apache.hadoop.hbase.master.TableLockManager

createTableLockManager, fromBytes

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

TableLockManager.NullTableLockManager

public TableLockManager.NullTableLockManager()

方法详细资料

writeLock

public TableLockManager.TableLock writeLock(TableName tableName,
                                   String purpose)

从类复制的说明: TableLockManager

Returns a TableLock for locking the table for exclusive access

指定者:

writeLock 在类中 TableLockManager

参数:

tableName - Table to lock

purpose - Human readable reason for locking the table

返回:

A new TableLock object for acquiring a write lock

readLock

public TableLockManager.TableLock readLock(TableName tableName,
                                  String purpose)

从类复制的说明: TableLockManager

Returns a TableLock for locking the table for shared access among read-lock holders

指定者:

readLock 在类中 TableLockManager

参数:

tableName - Table to lock

purpose - Human readable reason for locking the table

返回:

A new TableLock object for acquiring a read lock

reapAllExpiredLocks

public void reapAllExpiredLocks()
                         throws IOException

从类复制的说明: TableLockManager

Force releases all table locks(read and write) that have been held longer than "hbase.table.lock.expire.ms". Assumption is that the clock skew between zookeeper and this servers is negligible. The behavior of the lock holders still thinking that they have the lock is undefined.

指定者:

reapAllExpiredLocks 在类中 TableLockManager

抛出:

IOException - If there is an unrecoverable error

reapWriteLocks

public void reapWriteLocks()
                    throws IOException

从类复制的说明: TableLockManager

Force releases table write locks and lock attempts even if this thread does not own the lock. The behavior of the lock holders still thinking that they have the lock is undefined. This should be used carefully and only when we can ensure that all write-lock holders have died. For example if only the master can hold write locks, then we can reap it's locks when the backup master starts.

指定者:

reapWriteLocks 在类中 TableLockManager

抛出:

IOException - If there is an unrecoverable error

tableDeleted

public void tableDeleted(TableName tableName)
                  throws IOException

从类复制的说明: TableLockManager

Called after a table has been deleted, and after the table lock is released. TableLockManager should do cleanup for the table state.

指定者:

tableDeleted 在类中 TableLockManager

参数:

tableName - name of the table

抛出:

IOException - If there is an unrecoverable error releasing the lock

visitAllLocks

public void visitAllLocks(InterProcessLock.MetadataHandler handler)
                   throws IOException

从类复制的说明: TableLockManager

Visits all table locks(read and write), and lock attempts with the given callback MetadataHandler.

指定者:

visitAllLocks 在类中 TableLockManager

参数:

handler - the metadata handler to call

抛出:

IOException - If there is an unrecoverable error