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java.lang.Objectorg.apache.hadoop.hbase.master.TableLockManager
@InterfaceAudience.Private public abstract class TableLockManager
A manager for distributed table level locks.
Nested Class Summary | |
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static class |
TableLockManager.NullTableLockManager
A null implementation |
static interface |
TableLockManager.TableLock
A distributed lock for a table. |
Field Summary | |
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protected static int |
DEFAULT_TABLE_READ_LOCK_TIMEOUT_MS
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protected static int |
DEFAULT_TABLE_WRITE_LOCK_TIMEOUT_MS
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static String |
TABLE_LOCK_ENABLE
Configuration key for enabling table-level locks for schema changes |
protected static String |
TABLE_READ_LOCK_TIMEOUT_MS
Configuration key for time out for trying to acquire table locks |
protected static String |
TABLE_WRITE_LOCK_TIMEOUT_MS
Configuration key for time out for trying to acquire table locks |
Constructor Summary | |
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TableLockManager()
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Method Summary | |
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static TableLockManager |
createTableLockManager(org.apache.hadoop.conf.Configuration conf,
ZooKeeperWatcher zkWatcher,
ServerName serverName)
Creates and returns a TableLockManager according to the configuration |
abstract TableLockManager.TableLock |
readLock(byte[] tableName,
String purpose)
Returns a TableLock for locking the table for shared access among read-lock holders |
abstract void |
reapAllTableWriteLocks()
Force releases all table write locks and lock attempts even if this thread does not own the lock. |
abstract void |
tableDeleted(byte[] tableName)
Called after a table has been deleted, and after the table lock is released. |
abstract TableLockManager.TableLock |
writeLock(byte[] tableName,
String purpose)
Returns a TableLock for locking the table for exclusive access |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String TABLE_LOCK_ENABLE
protected static final String TABLE_WRITE_LOCK_TIMEOUT_MS
protected static final String TABLE_READ_LOCK_TIMEOUT_MS
protected static final int DEFAULT_TABLE_WRITE_LOCK_TIMEOUT_MS
protected static final int DEFAULT_TABLE_READ_LOCK_TIMEOUT_MS
Constructor Detail |
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public TableLockManager()
Method Detail |
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public abstract TableLockManager.TableLock writeLock(byte[] tableName, String purpose)
tableName
- Table to lockpurpose
- Human readable reason for locking the table
public abstract TableLockManager.TableLock readLock(byte[] tableName, String purpose)
tableName
- Table to lockpurpose
- Human readable reason for locking the table
public abstract void reapAllTableWriteLocks() throws IOException
IOException
public abstract void tableDeleted(byte[] tableName) throws IOException
tableName
- name of the table
IOException
- If there is an unrecoverable error releasing the lockpublic static TableLockManager createTableLockManager(org.apache.hadoop.conf.Configuration conf, ZooKeeperWatcher zkWatcher, ServerName serverName)
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