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OPENJPA-1986: Update migration consideration docs and Compatibility javadoc.

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git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@1202800 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Richard G. Curtis 2011-11-16 17:30:19 +00:00
parent b66ea198ae
commit f81908f3ac
2 changed files with 21 additions and 2 deletions
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4
openjpa-kernel/src/main/java/org/apache/openjpa/conf/Compatibility.java
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@ -558,7 +558,7 @@ public class Compatibility {
* only applies for the case where we are trying to cascade a persist to an Entity which doesn't have a StateManager * only applies for the case where we are trying to cascade a persist to an Entity which doesn't have a StateManager
* and we can't determine if it is detached. * and we can't determine if it is detached.
* *
* @since 2.1.x * @since 2.1.1
*/ */
public boolean getCheckDatabaseForCascadePersistToDetachedEntity(){ public boolean getCheckDatabaseForCascadePersistToDetachedEntity(){
return _checkDatabaseForCascadePersistToDetachedEntity; return _checkDatabaseForCascadePersistToDetachedEntity;
@ -569,7 +569,7 @@ public class Compatibility {
* only applies for the case where we are trying to cascade a persist to an Entity which doesn't have a StateManager * only applies for the case where we are trying to cascade a persist to an Entity which doesn't have a StateManager
* and we can't determine if it is detached. * and we can't determine if it is detached.
* *
* @since 2.1.x * @since 2.1.1
*/ */
public void setCheckDatabaseForCascadePersistToDetachedEntity(boolean b){ public void setCheckDatabaseForCascadePersistToDetachedEntity(boolean b){
_checkDatabaseForCascadePersistToDetachedEntity = b; _checkDatabaseForCascadePersistToDetachedEntity = b;

19
openjpa-project/src/doc/manual/migration_considerations.xml
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@ -458,6 +458,25 @@
<xref linkend="jpa_2.2_allocationSize"/>. <xref linkend="jpa_2.2_allocationSize"/>.
</para> </para>
</section> </section>
<section id="jpa_2.2_cascadePersist">
<title>
Cascade persist behavior
</title>
<!-- See OPENJPA-1986 for details. -->
<para>
In previous releases, OpenJPA would check the database for the
existence of the related Entity before persisting the relationship to
that Entity. This resulted in an extra Select being sent to the
database. In 2.2.0, code was added so that when cascading a persist to
a related Entity without persistence state, the persist (insert) will
happen without first checking the database. This may result in an
EntityExistsException if the related Entity already exists in the
database. To revert this behavior to the previous release, set the
value of the <literal>openjpa.Compatibility</literal>
property <literal>CheckDatabaseForCascadePersistToDetachedEntity</literal>
to <literal>true</literal>.
</para>
</section>
</section> </section>
</section> </section>
</appendix> </appendix>