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HW-53073: Allow Thread Interruption for WriteLockManager #1

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HW-53073: Allow Thread Interruption for WriteLockManager #1

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ad09e39
HW-53073: Allow Thread Interruption for WriteLockManager
agupta-hw May 27, 2019
e9e72ae
more logging.
agupta-hw Jun 3, 2019
fb013ff
more logging.
agupta-hw Jun 3, 2019
2d68361
more logging.
agupta-hw Jun 3, 2019
ef37683
wait 1 min before interrupt.
agupta-hw Jun 4, 2019
fdb4970
wait 1 min before interrupt.
agupta-hw Jun 4, 2019
c4663eb
writelock stuff changes.
agupta-hw Jun 18, 2019
965591d
log changes
agupta-hw Jun 19, 2019
35bff2a
log changes
agupta-hw Jun 24, 2019
4db2cb3
bump 70 to 130
agupta-hw Jul 4, 2019
5cd96c3
renames.
agupta-hw Jul 4, 2019
d22ff4a
renames.
agupta-hw Jul 4, 2019
c6f50ef
new logic with flag based conditionals.
agupta-hw Jul 22, 2019
5d35263
new logic with flag based conditionals.
agupta-hw Jul 23, 2019
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16 changes: 8 additions & 8 deletions ...clipse.persistence.core/src/org/eclipse/persistence/internal/helper/WriteLockManager.java
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,8 @@
import java.util.logging.Level;
import java.util.logging.Logger;

import static java.lang.Boolean.parseBoolean;

/**
* INTERNAL:
* <p>
Expand All @@ -57,21 +59,19 @@
* @since 10.0.3
*/
public class WriteLockManager {
private static Logger logger = Logger.getLogger(WriteLockManager.class.getSimpleName());

private static final Logger logger = Logger.getLogger(WriteLockManager.class.getSimpleName());

// this will allow us to prevent a readlock thread from looping forever.
public static final int MAXTRIES = 10000;

public static final int MAX_WAIT = 600000; //10 mins
private static volatile boolean interruptionEnabled;

public static boolean isInterruptionEnabled() {
return interruptionEnabled;
private static boolean isInterruptionEnabled() {
String value = System.getProperty("interruptionEnabled");
return parseBoolean(value);
}
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pretty simple. best of the hacky approaches imo.


public static void setInterruptionEnabled(boolean interruptionEnabled) {
WriteLockManager.interruptionEnabled = interruptionEnabled;
}

/* This attribute stores the list of threads that have had a problem acquiring locks */
/* the first element in this list will be the prevailing thread */
Expand Down Expand Up @@ -107,7 +107,7 @@ public Map acquireLocksForClone(Object objectForClone, ClassDescriptor descripto
} catch (InterruptedException ex) {
//https://jira.site1.hyperwallet.local/browse/HW-53073
//Custom change to allow thread interruptions for bad threads stuck in org.eclipse.persistence.internal.helper.WriteLockManager.acquireLocksForClone pattern
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if (interruptionEnabled) {
if (isInterruptionEnabled()) {
logger.log(Level.SEVERE,
"EclipseLinkLockHandler has set interruption flag to TRUE. Allowing interrupts");
throw ConcurrencyException.waitWasInterrupted(ex.getMessage());
Expand Down