org.apache.cassandra.utils.concurrent

Class OpOrder.Group

java.lang.Object

org.apache.cassandra.utils.concurrent.OpOrder.Group

All Implemented Interfaces:

java.lang.AutoCloseable, java.lang.Comparable<OpOrder.Group>

Enclosing class:

OpOrder

public static final class OpOrder.Group
extends java.lang.Object
implements java.lang.Comparable<OpOrder.Group>, java.lang.AutoCloseable

Represents a group of identically ordered operations, i.e. all operations started in the interval between two barrier issuances. For each register() call this is returned, close() must be called exactly once. It should be treated like taking a lock().

Method Summary

Modifier and Type	Method and Description
void	await()
void	close() To be called exactly once for each register() call this object is returned for, indicating the operation is complete
int	compareTo(OpOrder.Group that)
boolean	isBlocking()
WaitQueue.Signal	isBlockingSignal() register to be signalled when a barrier waiting on us is, or maybe, blocking general progress, so we should try more aggressively to progress
WaitQueue.Signal	isBlockingSignal(WaitQueue.Signal signal) wrap the provided signal to also be signalled if the operation gets marked blocking
boolean	isFinished()
boolean	isOldestLiveGroup()
OpOrder.Group	prev()

Methods inherited from class java.lang.Object

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

Method Detail

close

public void close()

To be called exactly once for each register() call this object is returned for, indicating the operation is complete

Specified by:

close in interface java.lang.AutoCloseable

isFinished

public boolean isFinished()

isOldestLiveGroup

public boolean isOldestLiveGroup()

await

public void await()

prev

public OpOrder.Group prev()

isBlocking

public boolean isBlocking()

Returns:

true if a barrier we are behind is, or may be, blocking general progress, so we should try more aggressively to progress

isBlockingSignal

public WaitQueue.Signal isBlockingSignal()

register to be signalled when a barrier waiting on us is, or maybe, blocking general progress, so we should try more aggressively to progress

isBlockingSignal

public WaitQueue.Signal isBlockingSignal(WaitQueue.Signal signal)

wrap the provided signal to also be signalled if the operation gets marked blocking

compareTo

public int compareTo(OpOrder.Group that)

Specified by:

compareTo in interface java.lang.Comparable<OpOrder.Group>