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[Java] Make synchronisation around shutdown latches more robust #167

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Feb 15, 2019
Merged

[Java] Make synchronisation around shutdown latches more robust #167

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18 changes: 15 additions & 3 deletions agrona/src/main/java/org/agrona/concurrent/ShutdownSignalBarrier.java
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ public class ShutdownSignalBarrier
*/
public ShutdownSignalBarrier()
{
synchronized (this)
synchronized (LATCHES)
{
LATCHES.add(latch);
}
Expand All @@ -58,19 +58,31 @@ public ShutdownSignalBarrier()
*/
public void signal()
{
synchronized (this)
synchronized (LATCHES)
{
LATCHES.remove(latch);
latch.countDown();
}
}

/**
* Programmatically signal all awaiting threads.
*/
public void signalAll()
{
synchronized (LATCHES)
{
LATCHES.forEach(CountDownLatch::countDown);
LATCHES.clear();
}
}

/**
* Remove the barrier from the shutdown signals.
*/
public void remove()
{
synchronized (this)
synchronized (LATCHES)
{
LATCHES.remove(latch);
}
Expand Down