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java.lang.Objectcom.sleepycat.je.txn.LockImpl
public class LockImpl
A Lock embodies the lock state of a NodeId. It includes a set of owners and a list of waiters.
Constructor Summary | |
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LockImpl()
Create a Lock. |
Method Summary | |
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void |
demote(Locker locker)
Downgrade a write lock to a read lock. |
void |
flushWaiter(Locker locker,
MemoryBudget mb,
int lockTableIndex)
Remove this locker from the waiter list. |
java.util.Set<LockInfo> |
getOwnersClone()
Get a new Set of the owners. |
java.util.List<LockInfo> |
getWaitersListClone()
Get a list of waiters for debugging and error messages. |
Locker |
getWriteOwnerLocker()
Return the locker that has a write ownership on this lock. |
boolean |
isOwnedWriteLock(Locker locker)
Return true if locker is an owner of this Lock and this is a write lock. |
boolean |
isOwner(Locker locker,
LockType lockType)
Return true if locker is an owner of this Lock for lockType, false otherwise. |
boolean |
isThin()
|
boolean |
isWaiter(Locker locker)
Return true if locker is a waiter on this Lock. |
com.sleepycat.je.txn.LockAttemptResult |
lock(LockType requestType,
Locker locker,
boolean nonBlockingRequest,
MemoryBudget mb,
int lockTableIndex)
Attempts to acquire the lock and returns the LockGrantType. |
int |
nOwners()
|
int |
nWaiters()
|
java.util.Set<Locker> |
release(Locker locker,
MemoryBudget mb,
int lockTableIndex)
Releases a lock and moves the next waiter(s) to the owners. |
java.lang.String |
toString()
Debug dumper. |
com.sleepycat.je.txn.Lock |
transfer(java.lang.Long nodeId,
Locker currentLocker,
Locker destLocker,
MemoryBudget mb,
int lockTableIndex)
Transfer a lock from one transaction to another. |
com.sleepycat.je.txn.Lock |
transferMultiple(java.lang.Long nodeId,
Locker currentLocker,
Locker[] destLockers,
MemoryBudget mb,
int lockTableIndex)
Transfer a lock from one transaction to many others. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public LockImpl()
Method Detail |
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public java.util.List<LockInfo> getWaitersListClone()
public void flushWaiter(Locker locker, MemoryBudget mb, int lockTableIndex)
public java.util.Set<LockInfo> getOwnersClone()
public boolean isOwner(Locker locker, LockType lockType)
public boolean isOwnedWriteLock(Locker locker)
public boolean isWaiter(Locker locker)
public int nWaiters()
public int nOwners()
public com.sleepycat.je.txn.LockAttemptResult lock(LockType requestType, Locker locker, boolean nonBlockingRequest, MemoryBudget mb, int lockTableIndex)
public java.util.Set<Locker> release(Locker locker, MemoryBudget mb, int lockTableIndex)
public void demote(Locker locker)
public com.sleepycat.je.txn.Lock transfer(java.lang.Long nodeId, Locker currentLocker, Locker destLocker, MemoryBudget mb, int lockTableIndex) throws DatabaseException
DatabaseException
public com.sleepycat.je.txn.Lock transferMultiple(java.lang.Long nodeId, Locker currentLocker, Locker[] destLockers, MemoryBudget mb, int lockTableIndex) throws DatabaseException
DatabaseException
public Locker getWriteOwnerLocker()
public boolean isThin()
public java.lang.String toString()
toString
in class java.lang.Object
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