Package org.apache.druid.server.coordination

Class SegmentDropLatch

java.lang.Object

org.apache.druid.server.coordination.SegmentDropLatch

public class SegmentDropLatch
extends Object

Latch held by SegmentLoadDropHandler.segmentDropLatches when a drop is scheduled or actively happening.

Constructor Summary

Constructors

Constructor	Description
SegmentDropLatch()

Method Summary

Modifier and Type	Method	Description
void	cancelOrAwait()	Cancels this latch if the drop has not yet begun to execute.
void	doneDropping()	Sets this latch to SegmentDropLatch.State.DONE state, if it was in SegmentDropLatch.State.DROPPING.
boolean	startDropping()	Sets this latch to SegmentDropLatch.State.DROPPING state, if it was in SegmentDropLatch.State.PENDING.

Methods inherited from class java.lang.Object

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

Constructor Details

SegmentDropLatch

public SegmentDropLatch()

Method Details

startDropping

public boolean startDropping()

Sets this latch to SegmentDropLatch.State.DROPPING state, if it was in SegmentDropLatch.State.PENDING.

Returns:

whether the original state was SegmentDropLatch.State.PENDING

doneDropping

public void doneDropping()

Sets this latch to SegmentDropLatch.State.DONE state, if it was in SegmentDropLatch.State.DROPPING. Otherwise does nothing.

cancelOrAwait

public void cancelOrAwait()
                   throws InterruptedException

Cancels this latch if the drop has not yet begun to execute. Otherwise, waits for the drop to finish. Once this method returns, the drop is definitely no longer scheduled (it has either been canceled, or has already happened).

Throws:

InterruptedException