Hi Steve,
Although there isn't any direct support for this, it's should be relatively
easy to do by using the underlying JDO API.
As a quick code sketch:
public interface CreateTrackingEntity {
void setCreatedBy(String createdBy);
void setCreatedOn(DateTime createdOn);
}
public interface ModifyTrackingEntity {
void setModifiedBy(String username);
void setModifiedOn(DateTime modifiedOn);
}
Your entity should implement one or both of the above.
Then, define a service such as:
@RequestScoped
@DomainService(nature=NatureOfService.DOMAIN)
public class UpdateableEntityServices implements
javax.jdo.listener.StoreLifecycleListener {
@PostConstruct
public void open() {
isisJdoSupport.getJdoPersistenceManager().addInstanceLifecycleListener(this);
}
@PreDestroy
public void close() {
isisJdoSupport.getJdoPersistenceManager().removeInstanceLifecycleListener(this);
}
@Programmatic
public void preStore (InstanceLifecycleEvent event) {
final Object pi = event.getPersistentInstance();
if(pi instanceof org.datanucleus.enhancement.Persistable) {
boolean isPersistent =
((org.datanucleus.enhancement.Persistable)pi).dnIsPersistent();
if(!isPersistent) {
if(pi instanceof CreateTrackingEntity) {
((CreateTrackingEntity)pi).setCreatedBy(container.getUserName());
((CreateTrackingEntity)pi).setCreatedOn(clockService.nowAsDateTime());
}
} else {
if(pi instanceof ModifyTrackingEntity) {
((ModifyTrackingEntity)pi).setModifiedBy(container.getUserName());
((ModifyTrackingEntity)pi).setModifedOn(clockService.nowAsDateTime());
}
}
}
}
@Programmatic
public void postStore (InstanceLifecycleEvent event) {
// no-op
}
@Inject
private DomainObjectContainer container;
@Inject
private ClockService clockService;
@Inject
private IsisJdoSupport isisJdoSupport;
}
~~~~~~~~~~~~
There is actually a ticket in JIRA for this [1], so I'll formalize this as
a service in Isis 1.10.0.
HTH
Dan
[1] https://issues.apache.org/jira/browse/ISIS-867
On 16 September 2015 at 05:18, Stephen Cameron <[email protected]>
wrote:
> Hi,
>
> Could someone please assist me in adding this capability, to automate the
> creation and update of values in these standard fields
>
> created_by
> created_on
> modified_by
> modified_on
>
> That is I need to set the first two on creating a new object, and the last
> two on modifying an object.
>
> Thanks
> Steve Cameron
>
