Hey again !
Sorry for bothering everyone but I just wanted to say that I think I found
my perfect solution. I was looking at
the EntityApplicationStatePersistenceStrategy class and it just gave me my
answer...
Maybe my new solution should replace the clumsy
EntityPersistentFieldStrategy of tapestry-jpa project:
public class BetterEntityPersistentFieldStrategy extends
AbstractSessionPersistentFieldStrategy {
private final static String PREFIX = "entity:";
private final EntityManagerManager entityManagerManager;
public BetterEntityPersistentFieldStrategy(final EntityManagerManager
entityManagerManager,
final Request request) {
super(PREFIX, request);
this.entityManagerManager = entityManagerManager;
}
@Override
protected Object convertApplicationValueToPersisted(final Object
newValue) {
try {
return
JpaInternalUtils.convertApplicationValueToPersisted(entityManagerManager,
newValue);
} catch (final RuntimeException ex) {
return super.convertApplicationValueToPersisted(newValue);
}
}
@Override
protected Object convertPersistedToApplicationValue(final Object
persistedValue) {
if (persistedValue instanceof PersistedEntity) {
final PersistedEntity persisted = (PersistedEntity)
persistedValue;
return persisted.restore(entityManagerManager);
} else {
return super.convertPersistedToApplicationValue(persistedValue);
}
}
}
Sorry again for spamming :)
2014-09-18 0:27 GMT+02:00 Charlouze <m...@charlouze.com>:
> Hello everybody,
>
> I'm really not sure about what I did and I really appreciate a feedback
> from people who knows how persistent fields works.
>
> If i'm not clear enough or anything about my issue, just let me know.
>
> Cheers,
> Charles.
>
> 2014-09-16 17:13 GMT+02:00 Charlouze <m...@charlouze.com>:
>
>> As for now, I solved my problem using a new PersistentFieldStrategy and I
>> want your opinion about it:
>>
>> public class MultiplePersistentFieldStrategy implements
>> PersistentFieldStrategy {
>>
>> private final Logger logger;
>>
>> private final List<PersistentFieldStrategy> delegates;
>>
>> public MultiplePersistentFieldStrategy(final Logger logger,
>> final List<PersistentFieldStrategy> delegates) {
>> this.logger = logger;
>> this.delegates = Lists.newArrayList(delegates);
>> }
>>
>> @Override
>> public void postChange(final String pageName, final String
>> componentId, final String fieldName,
>> final Object newValue) {
>> for (final PersistentFieldStrategy persistentFieldStrategy :
>> delegates) {
>> try {
>> persistentFieldStrategy.postChange(pageName, componentId,
>> fieldName, newValue);
>> return;
>> } catch (final RuntimeException e) {
>> logger.debug("Error while using a
>> PersistentFieldStrategy", e);
>> }
>> }
>> throw new IllegalArgumentException("Unable to find any suitable
>> PersistentFieldStrategy");
>> }
>>
>> @Override
>> public Collection<PersistentFieldChange> gatherFieldChanges(final
>> String pageName) {
>> final List<PersistentFieldChange> persistentFieldChanges =
>> Lists.newArrayList();
>> for (final PersistentFieldStrategy persistentFieldStrategy :
>> delegates) {
>>
>> persistentFieldChanges.addAll(persistentFieldStrategy.gatherFieldChanges(pageName));
>> }
>> return persistentFieldChanges;
>> }
>>
>> @Override
>> public void discardChanges(final String pageName) {
>> for (final PersistentFieldStrategy persistentFieldStrategy :
>> delegates) {
>> persistentFieldStrategy.discardChanges(pageName);
>> }
>> }
>> }
>>
>> Thanks again,
>>
>> Charles.
>>
>> 2014-09-16 16:29 GMT+02:00 Charlouze <m...@charlouze.com>:
>>
>>> Hello Tapestry users & devs,
>>>
>>> I have a component which does lots of ajax requests. Parameters setted
>>> at the first render are not available upon ajax requests so I decided to
>>> persist them in specific properties.
>>> One of those parameter is a database entity (I use tapestry-jpa) so I
>>> decided to use the the "entity" strategy so that my entity is reload and
>>> managed on every request.
>>> My problem is that when I use my component on a non persisted (yet)
>>> entity, it crashes as it is a transient entity that cannot be found.
>>>
>>> Do you think of a better way than creating my own persistence strategy ?
>>>
>>> Thx in advance :D
>>>
>>
>>
>
