org.apache.cassandra.utils.concurrent

Class IntervalLock

java.lang.Object

java.util.concurrent.locks.ReentrantReadWriteLock

org.apache.cassandra.utils.concurrent.IntervalLock

All Implemented Interfaces:

java.io.Serializable, java.util.concurrent.locks.ReadWriteLock

public class IntervalLock
extends java.util.concurrent.locks.ReentrantReadWriteLock

This class extends ReentrantReadWriteLock to provide a write lock that can only be acquired at provided intervals.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.locks.ReentrantReadWriteLock

java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock, java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock

Constructor Summary

Constructors

Constructor and Description
IntervalLock(TimeSource timeSource)

Method Summary

Modifier and Type	Method and Description
long	getLastIntervalAcquire()
void	releaseIntervalLock() Release the last acquired interval lock.
boolean	tryIntervalLock(long interval) Try acquiring a write lock if the given interval is passed since the last call to this method.

Methods inherited from class java.util.concurrent.locks.ReentrantReadWriteLock

getOwner, getQueuedReaderThreads, getQueuedThreads, getQueuedWriterThreads, getQueueLength, getReadHoldCount, getReadLockCount, getWaitingThreads, getWaitQueueLength, getWriteHoldCount, hasQueuedThread, hasQueuedThreads, hasWaiters, isFair, isWriteLocked, isWriteLockedByCurrentThread, readLock, toString, writeLock

Methods inherited from class java.lang.Object

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

Constructor Detail

IntervalLock

public IntervalLock(TimeSource timeSource)

Method Detail

tryIntervalLock

public boolean tryIntervalLock(long interval)

Try acquiring a write lock if the given interval is passed since the last call to this method.

Parameters:

interval - In millis.

Returns:

True if acquired and locked, false otherwise.

releaseIntervalLock

public void releaseIntervalLock()

Release the last acquired interval lock.

getLastIntervalAcquire

public long getLastIntervalAcquire()