org.apache.hadoop.hive.ql.lockmgr

Class EmbeddedLockManager

java.lang.Object

org.apache.hadoop.hive.ql.lockmgr.EmbeddedLockManager

All Implemented Interfaces:

HiveLockManager

public class EmbeddedLockManager
extends Object
implements HiveLockManager

shared lock manager for dedicated hive server. all locks are managed in memory

Constructor Summary

Constructors

Constructor and Description
EmbeddedLockManager()

Method Summary

Modifier and Type	Method and Description
void	close()
List<HiveLock>	getLocks(boolean verifyTablePartitions, boolean fetchData)
List<HiveLock>	getLocks(boolean verifyTablePartitions, boolean fetchData, HiveConf conf)
List<HiveLock>	getLocks(HiveLockObject key, boolean verifyTablePartitions, boolean fetchData)
List<HiveLock>	getLocks(HiveLockObject key, boolean verifyTablePartitions, boolean fetchData, HiveConf conf)
HiveLock	lock(HiveLockObject key, HiveLockMode mode, boolean keepAlive)
HiveLock	lock(HiveLockObject key, HiveLockMode mode, int numRetriesForLock, long sleepTime)
List<HiveLock>	lock(List<HiveLockObj> objs, boolean keepAlive, Driver.LockedDriverState lDrvState)
void	prepareRetry()
void	refresh() refresh to enable new configurations.
void	releaseLocks(List<HiveLock> hiveLocks)
void	releaseLocks(List<HiveLock> hiveLocks, int numRetriesForUnLock, long sleepTime)
void	setContext(HiveLockManagerCtx ctx)
void	unlock(HiveLock hiveLock)
void	unlock(HiveLock hiveLock, int numRetriesForUnLock, long sleepTime)

Methods inherited from class java.lang.Object

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

Constructor Detail

EmbeddedLockManager

public EmbeddedLockManager()

Method Detail

setContext

public void setContext(HiveLockManagerCtx ctx)
                throws LockException

Specified by:

setContext in interface HiveLockManager

Throws:

LockException

lock

public HiveLock lock(HiveLockObject key,
                     HiveLockMode mode,
                     boolean keepAlive)
              throws LockException

Specified by:

lock in interface HiveLockManager

Parameters:

key - object to be locked

mode - mode of the lock (SHARED/EXCLUSIVE)

keepAlive - if the lock needs to be persisted after the statement

Throws:

LockException

lock

public List<HiveLock> lock(List<HiveLockObj> objs,
                           boolean keepAlive,
                           Driver.LockedDriverState lDrvState)
                    throws LockException

Specified by:

lock in interface HiveLockManager

Throws:

LockException

unlock

public void unlock(HiveLock hiveLock)
            throws LockException

Specified by:

unlock in interface HiveLockManager

Throws:

LockException

releaseLocks

public void releaseLocks(List<HiveLock> hiveLocks)

Specified by:

releaseLocks in interface HiveLockManager

getLocks

public List<HiveLock> getLocks(boolean verifyTablePartitions,
                               boolean fetchData)
                        throws LockException

Specified by:

getLocks in interface HiveLockManager

Throws:

LockException

getLocks

public List<HiveLock> getLocks(HiveLockObject key,
                               boolean verifyTablePartitions,
                               boolean fetchData)
                        throws LockException

Specified by:

getLocks in interface HiveLockManager

Throws:

LockException

prepareRetry

public void prepareRetry()

Specified by:

prepareRetry in interface HiveLockManager

refresh

public void refresh()

Description copied from interface: HiveLockManager

refresh to enable new configurations.

Specified by:

refresh in interface HiveLockManager

lock

public HiveLock lock(HiveLockObject key,
                     HiveLockMode mode,
                     int numRetriesForLock,
                     long sleepTime)
              throws LockException

Throws:

LockException

unlock

public void unlock(HiveLock hiveLock,
                   int numRetriesForUnLock,
                   long sleepTime)
            throws LockException

Throws:

LockException

releaseLocks

public void releaseLocks(List<HiveLock> hiveLocks,
                         int numRetriesForUnLock,
                         long sleepTime)

getLocks

public List<HiveLock> getLocks(boolean verifyTablePartitions,
                               boolean fetchData,
                               HiveConf conf)
                        throws LockException

Throws:

LockException

getLocks

public List<HiveLock> getLocks(HiveLockObject key,
                               boolean verifyTablePartitions,
                               boolean fetchData,
                               HiveConf conf)
                        throws LockException

Throws:

LockException

close

public void close()

Specified by:

close in interface HiveLockManager