Class StampedLockManager
java.lang.Object
org.eclipse.rdf4j.common.concurrent.locks.StampedLockManager
- All Implemented Interfaces:
ReadWriteLockManager
A read/write-lock manager backed by a StampedLock.
This class is in an experimental state: its existence, signature or behavior may change without warning from one release to the next.
- Author:
- HÃ¥vard M. Ottestad
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic classstatic class -
Constructor Summary
ConstructorsConstructorDescriptionStampedLockManager(boolean trackLocks) StampedLockManager(boolean trackLocks, int waitToCollect) StampedLockManager(String alias, int waitToCollect, LockDiagnostics... lockDiagnostics) StampedLockManager(String alias, LockDiagnostics... lockDiagnostics) -
Method Summary
Modifier and TypeMethodDescriptionconvertToReadLock(Lock writeLock) Convert a write lock to a read lock.Gets an optimistic read lock, if available.Gets a read lock.Gets an exclusive write lock.booleanReturnsfalseif there are no active read locks, otherwise returnstrue.booleanReturnsfalseif there are no active write locks, otherwise returnstrue.Gets a read lock, if available.Gets an exclusive write lock, if available.voidBlocks until all read locks have been released.voidBlocks until all write locks have been released.
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Constructor Details
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StampedLockManager
public StampedLockManager() -
StampedLockManager
public StampedLockManager(boolean trackLocks) -
StampedLockManager
public StampedLockManager(boolean trackLocks, int waitToCollect) -
StampedLockManager
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StampedLockManager
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Method Details
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isWriterActive
public boolean isWriterActive()Returnsfalseif there are no active write locks, otherwise returnstrue.- Specified by:
isWriterActivein interfaceReadWriteLockManager
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isReaderActive
public boolean isReaderActive()Returnsfalseif there are no active read locks, otherwise returnstrue.- Specified by:
isReaderActivein interfaceReadWriteLockManager
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waitForActiveWriter
Blocks until all write locks have been released.- Specified by:
waitForActiveWriterin interfaceReadWriteLockManager- Throws:
InterruptedException- In case the thread requesting the lock wasinterrupted.
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waitForActiveReaders
Blocks until all read locks have been released.- Specified by:
waitForActiveReadersin interfaceReadWriteLockManager- Throws:
InterruptedException- In case the thread requesting the lock wasinterrupted.
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getReadLock
Gets a read lock. This method blocks until the read lock is available.- Specified by:
getReadLockin interfaceReadWriteLockManager- Throws:
InterruptedException- In case the thread requesting the lock wasinterrupted.
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getOptimisticReadLock
Gets an optimistic read lock, if available. This method will return null if the optimistic read lock is not immediately available. -
convertToReadLock
Convert a write lock to a read lock. -
getWriteLock
Gets an exclusive write lock. This method blocks until the write lock is available.- Specified by:
getWriteLockin interfaceReadWriteLockManager- Throws:
InterruptedException- In case the thread requesting the lock wasinterrupted.
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tryReadLock
Gets a read lock, if available. This method will return null if the read lock is not immediately available.- Specified by:
tryReadLockin interfaceReadWriteLockManager
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tryWriteLock
Gets an exclusive write lock, if available. This method will return null if the write lock is not immediately available.- Specified by:
tryWriteLockin interfaceReadWriteLockManager
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