In general, it's very useful for a postconstruct/predestroy method to be able to be called within a transaction.
For example, consider seeding data into a database (singleton with @Startup and an @PreDestroy), logging user access (http session scoped SFSB) and so on.
On 7 Sep 2011, at 03:18, Marina Vatkina wrote:
> Experts,
>
> Let's clarify transactional support for PostConstuct or PreDestroy methods.
>
> a) PostConstuct or PreDestroy methods of a singleton session bean can be executed in a transaction, while other bean types do not seem to allow this. Why would the singleton bean is different from any other bean?
>
> b) Why would the transactional attribute be specified differently for a singleton vs. other beans? See e.g. an XXX marker under section "8.3.7 Specification of the Transaction Attributes for a Bean’s Methods" in one of the bullets of the "Transaction attributes are specified for the following methods:" text:
>
> <...>
>
> For a singleton session bean, the transaction attributes are specified for the PostConstruct and PreDestroy lifecycle callback interceptor methods, if any. In order to specify the transaction attribute for a PostConstuct or PreDestroy method of a singleton session bean, the transaction attribute must be specified for the method(s) on the bean class, rather than for a superclass or PostConstruct or PreDestroy interceptor method."
>
> thanks,
> -marina
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