Congratulations Alex!!! > -----Message d'origine----- > De : [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]De la part de > [EMAIL PROTECTED] > Envoyé : jeudi, 26 décembre 2002 09:47 > À : [EMAIL PROTECTED] > Objet : [JBoss-dev] [ jboss-Change Notes-658609 ] Optimistic locking > support > > > Change Notes item #658609, was opened at 2002-12-26 10:46 > You can respond by visiting: > https://sourceforge.net/tracker/?func=detail&atid=381174&aid=65860 > 9&group_id=22866 > > Category: JBossCMP > Group: v3.2 > Status: Open > Priority: 5 > Submitted By: Alexey Loubyansky (loubyansky) > Assigned to: Nobody/Anonymous (nobody) > Summary: Optimistic locking support > > Initial Comment: > To setup optimistic locking, container configuration > element locking-policy should be set to > <locking- > policy>org.jboss.ejb.plugins.lock.JDBCOptimisticLock</l > ocking-policy> > and entity element in jbosscmp-jdbc.xml should have > optimistic-locking element. > > Following are the possible configurations of optimistic- > locking element: > 1. Fixed group of fields that will be used for optimistic > locking. > <optimistic-locking> > <group-name>optimisticLockingGroup</group- > name> > </optimistic-locking> > where optimisticLockingGroup is one of the entity's load- > group-name's. > > 2. Modified strategy. The fields that were modified during > transaction will be used for optimistic locking. > <optimistic-locking> > <modified-strategy/> > </optimistic-locking> > > 3. Read strategy. The fields that were read during > transaction will be used for optimistic locking. > <optimistic-locking> > <read-strategy/> > </optimistic-locking> > > 4. Version (counter) column strategy. Additional version > (counter) field of type java.lang.Long will be added to > entity which > > will be used for optimistic locking. Each update of the > entity will increase the value of its version field by 1. > <optimistic-locking> > <version-column/> > <field-name>versionField</field-name> > <column-name>ol_version</column-name> > <jdbc-type>INTEGER</jdbc-type> > <sql-type>INTEGER(5)</sql-type> > </optimistic-locking> > > 5. Timestamp column strategy. Additional timestamp > column field of type java.util.Date will be added to entity > which will be > > used for optimistic locking. Each update of the entity will > set the value of its timestamp field to the current time. > <optimistic-locking> > <timestamp-column/> > <field-name>timestampField</field-name> > <column-name>ol_timestamp</column-name> > <jdbc-type>TIMESTAMP</jdbc-type> > <sql-type>DATETIME</sql-type> > </optimistic-locking> > > 6. Version column generated by KeyGenerator. > Additional field will be added to entity that will be used > for optimistic > > locking. Each update of the entity will update its version > column with value generated by KeyGenerator. > <optimistic-locking> > <key-generator- > factory>UUIDKeyGeneratorFactory</key-generator- > factory> > <field-type>java.lang.String</field-type> > <field-name>uuidField</field-name> > <column-name>ol_uuid</column-name> > <jdbc-type>VARCHAR</jdbc-type> > <sql-type>VARCHAR(32)</sql-type> > </optimistic-locking> > > > ---------------------------------------------------------------------- > > You can respond by visiting: > https://sourceforge.net/tracker/?func=detail&atid=381174&aid=65860 9&group_id=22866
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