Package org.gcube.informationsystem.resourceregistry.persistence.orientdb.utils

Class ConcurrentWriteDetector

java.lang.Object

org.gcube.informationsystem.resourceregistry.persistence.orientdb.utils.ConcurrentWriteDetector

public final class ConcurrentWriteDetector
extends Object

Recognizes the failure of a write that lost the race with another write: the backend reports it with an ONeedRetryException when both changed the same records, and with a duplicate key (see DuplicateKeyDetector) when both wrote the same value of a unique index (e.g. the same id), which the checks of the service, made before the other write committed, could not see. The layers above may have wrapped it. Repeated, the write meets the committed one and gets its ordinary answer.

Author:

Luca Frosini (ISTI - CNR)

Method Summary

Modifier and Type	Method	Description
static boolean	isConcurrentWrite(Throwable throwable)	Returns whether the given failure, or one of its causes, is a concurrent write lost.

Methods inherited from class java.lang.Object

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

Method Details

isConcurrentWrite

public static boolean isConcurrentWrite(Throwable throwable)

Returns whether the given failure, or one of its causes, is a concurrent write lost.

Parameters:

throwable - the failure

Returns:

true if the write can be repeated as it is