RequestFactory error management

[ungarida]

Hi all,

the scenario is:

- I have an ententy with its requestfatory, which manages correctly constraints violations.

- I want also to catch an "SQLException" for a duplicate key and send an error message to the client.

From documentation is specified that onFailure callback "receives general failure notifications".

So I tought that the solution could be to use onSuccess callback putting the entity inside a wrapper RequestResult object.

But Requests can be parameterized with the following types:

• Built-in value types: BigDecimal, BigInteger, Boolean, Byte, Enum, Character, Date, Double, Float, Integer, Long, Short, String, Void
• Custom value types: any subclass of ValueProxy
• Entity types: any subclass of EntityProxy
• Collections: List<T> or Set<T>, where T is one of the above value or entity types

So my RequestResult should have a proxy interface which extends ValueProxy.

At this point I lost some piece because it seems to be too complicated.

Any ideas?