org.springframework.orm.jdo Documentation Differences

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Execute the action specified by the given action object within a PersistenceManager. Application exceptions thrown by the action object get propagated to the caller (can only be unchecked). JDO exceptions are transformed into appropriate DAO ones. Allows for returning a result object, i.e. a domain object or a collection of domain objects.

Note: Callback code is not supposed to handle transactions itself! Use an appropriate transaction manager like JdoTransactionManager. @param action callback object that specifies the JDO action @return a result object returned by the action, or null @throws org.springframework.dao.DataAccessException in case of JDO errors @see JdoTransactionManager @see org.springframework.dao @see org.springframework.transaction @see javax.jdo.PersistenceManager

Flush all transactional modifications to the database.

Only invoke this for selective eager flushing, for example when JDBC code needs to see certain changes within the same transaction. Else, it's preferable to rely on auto-flushing at transaction completion. @throws org.springframework.dao.DataAccessException in case of JDO errors @see javax.jdo.PersistenceManager#flush() @see JdoDialect#flush(javax.jdo.PersistenceManager)