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https://issues.apache.org/jira/browse/OPENJPA-578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590967#action_12590967
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Fay Wang commented on OPENJPA-578:
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There is a typo in this example:
"Instead, the NumberVersionStrategy is adopted. " should be changed to
"Instead, the TimestampVersionStrategy is adopted." See below:
@Entity
public class EntityA {
@Id int id;
String name;
double amt;
@Version java.sql.Timestamp lastUpdate;
For EntityA, the version strategy should be RowChangeTimestampStrategy.
Instead, the TimestampVersionStrategy is adopted.
If the @Version is removed from EntityA, the version strategy becomes
RowChangeTimestampStrategy.
> Specifying a default for VersionStrategy in persistence.xml has no effect
> when a version field is present in the entity class.
> ------------------------------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-578
> URL: https://issues.apache.org/jira/browse/OPENJPA-578
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc
> Affects Versions: 1.0.2
> Reporter: Fay Wang
> Fix For: 1.2.0
>
> Attachments: openjpa.patch
>
>
> Specifying a default for VersionStrategy in persistence.xml has no effect
> when a version field is present in the entity class.
> According the OpenJPA documentation the following property should override
> the default value of VersionStrategy and the specified
> RowChangeTimestampStrategy should be applied for all entity classes.
> <property name="openjpa.jdbc.MappingDefaults"
>
> value="jpa(VersionStrategy=com.ibm.websphere.persistence.RowChangeTimestampStrategy)"
> />
> JPA accepts this property but then it has no effect on Entity mappings if the
> version field is present.
> import javax.persistence.*;
> import org.apache.openjpa.persistence.jdbc.VersionStrategy;
> @Entity
> public class EntityA {
> @Id int id;
> String name;
> double amt;
> @Version java.sql.Timestamp lastUpdate;
> For EntityA, the version strategy should be RowChangeTimestampStrategy.
> Instead, the NumberVersionStrategy is adopted.
> If the @Version is removed from EntityA, the version strategy becomes
> RowChangeTimestampStrategy.
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