public static interface TxnStore.MutexAPI
LockHandle
uses a java.sql.Connection so use it sparingly.Modifier and Type | Interface and Description |
---|---|
static interface |
TxnStore.MutexAPI.LockHandle |
Modifier and Type | Method and Description |
---|---|
TxnStore.MutexAPI.LockHandle |
acquireLock(String key)
The
key is name of the lock. |
void |
acquireLock(String key,
TxnStore.MutexAPI.LockHandle handle)
Same as
acquireLock(String) but takes an already existing handle as input. |
TxnStore.MutexAPI.LockHandle acquireLock(String key) throws MetaException
key
is name of the lock. Will acquire and exclusive lock or block. It retuns
a handle which must be used to release the lock. Each invocation returns a new handle.MetaException
void acquireLock(String key, TxnStore.MutexAPI.LockHandle handle) throws MetaException
acquireLock(String)
but takes an already existing handle as input. This
will associate the lock on key
with the same handle. All locks associated with
the same handle will be released together.handle
- not NULLMetaException
Copyright © 2016 The Apache Software Foundation. All rights reserved.