Package org.apache.cassandra.utils.concurrent

Class WaitQueue.Standard

java.lang.Object

org.apache.cassandra.utils.concurrent.WaitQueue.Standard

All Implemented Interfaces:

WaitQueue

Enclosing interface:

WaitQueue

public static class WaitQueue.Standard
extends Object
implements WaitQueue

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	WaitQueue.Standard.AbstractSignal	An abstract signal implementation TODO: use intrusive linked list

Nested classes/interfaces inherited from interface org.apache.cassandra.utils.concurrent.WaitQueue

WaitQueue.Signal, WaitQueue.Standard

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Standard()

Method Summary

Modifier and Type	Method	Description
int	getWaiting()	Return how many threads are waiting
boolean	hasWaiters()	getWaiting() > 0
WaitQueue.Signal	register()	The calling thread MUST be the thread that uses the signal
<V> WaitQueue.Signal	register(V supplyOnDone, Consumer<V> receiveOnDone)	The calling thread MUST be the thread that uses the signal.
boolean	signal()	Signal one waiting thread
void	signalAll()	Signal all waiting threads

Methods inherited from class java.lang.Object

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

Constructor Details

Standard

protected Standard()

Method Details

register

public WaitQueue.Signal register()

The calling thread MUST be the thread that uses the signal

Specified by:

register in interface WaitQueue

Returns:

x

register

public <V> WaitQueue.Signal register(V supplyOnDone,
 Consumer<V> receiveOnDone)

The calling thread MUST be the thread that uses the signal. If the Signal is waited on, context.stop() will be called when the wait times out, the Signal is signalled, or the waiting thread is interrupted.

Specified by:

register in interface WaitQueue

signal

public boolean signal()

Signal one waiting thread

Specified by:

signal in interface WaitQueue

signalAll

public void signalAll()

Signal all waiting threads

Specified by:

signalAll in interface WaitQueue

hasWaiters

public boolean hasWaiters()

Description copied from interface: WaitQueue

getWaiting() > 0

Specified by:

hasWaiters in interface WaitQueue

getWaiting

public int getWaiting()

Description copied from interface: WaitQueue

Return how many threads are waiting

Specified by:

getWaiting in interface WaitQueue

Returns:

how many threads are waiting