[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5025) Support caching audit queries using ehcache's DiskStore.

[Brent Worden (JIRA)]

Support caching audit queries using ehcache's DiskStore.
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                 Key: HHH-5025
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5025
             Project: Hibernate Core
          Issue Type: Improvement
          Components: envers
            Reporter: Brent Worden
            Priority: Minor


Enabling audit query caching with a ehcache cache configured as persisting to disk or overflowing to disk.  For example,
<defaultCache diskPersistent="true" eternal="false" maxElementsInMemory="1000" maxElementsOnDisk="10000" overflowToDisk="true" timeToIdleSeconds="300" timeToLiveSeconds="3600" />

Results in the following exception:

java.io.NotSerializableException: org.hibernate.envers.entities.RevisionTypeType
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)

The lack of needed serialization prohibits the use of ehcache's DiskStore.

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