org.apache.hadoop.hive.ql.lockmgr
Interface HiveLockManager

All Known Implementing Classes:

DbLockManager, EmbeddedLockManager, ZooKeeperHiveLockManager

public interface HiveLockManager

Manager for locks in Hive. Users should not instantiate a lock manager directly. Instead they should get an instance from their instance of HiveTxnManager.

Method Summary

void	close()
List<HiveLock>	getLocks(boolean verifyTablePartitions, boolean fetchData)
List<HiveLock>	getLocks(HiveLockObject key, boolean verifyTablePartitions, boolean fetchData)
HiveLock	lock(HiveLockObject key, HiveLockMode mode, boolean keepAlive)
List<HiveLock>	lock(List<HiveLockObj> objs, boolean keepAlive)
void	prepareRetry()
void	refresh() refresh to enable new configurations.
void	releaseLocks(List<HiveLock> hiveLocks)
void	setContext(HiveLockManagerCtx ctx)
void	unlock(HiveLock hiveLock)

Method Detail

setContext

void setContext(HiveLockManagerCtx ctx)
                throws LockException

Throws:

LockException

lock

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

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

List<HiveLock> lock(List<HiveLockObj> objs,
                    boolean keepAlive)
                    throws LockException

Throws:

LockException

unlock

void unlock(HiveLock hiveLock)
            throws LockException

Throws:

LockException

releaseLocks

void releaseLocks(List<HiveLock> hiveLocks)

getLocks

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

Throws:

LockException

getLocks

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

Throws:

LockException

close

void close()
           throws LockException

Throws:

LockException

prepareRetry

void prepareRetry()
                  throws LockException

Throws:

LockException

refresh

void refresh()

refresh to enable new configurations.