[cdi-dev] [JBoss JIRA] (CDI-708) Serialization problems in section "1.3.1. JSF example".
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https://issues.jboss.org/browse/CDI-708?page=com.atlassian.jira.plugin.sy...
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Martin Kouba commented on CDI-708:
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Good catch! For the record, this also applies to {{CriteriaQuery<User> query}} field
and the resource bean for {{EntityManager}} is defined in 1.3.3 as {{@Dependent}}:
{code:java}
@Produces @PersistenceContext(unitName="UserData")
@Users EntityManager userDatabaseEntityManager;
{code}
(in fact, containers are not required to support resources with scope other than
{{@Dependent}})
Serialization problems in section "1.3.1. JSF example".
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Key: CDI-708
URL: https://issues.jboss.org/browse/CDI-708
Project: CDI Specification Issues
Issue Type: Bug
Components: Concepts
Affects Versions: 2.0 .Final
Reporter: Martin Andersson
Section "1.3.1. JSF example" provide an example of a class {{Login}}, that
saves in its state an {{EntityManager}} reference and two {{Parameter}} references.
The JPA specification does not say that a {{Parameter}} instance is serializable.
This is also true for the {{EntityManager}} reference which is {{@Dependent}} (see
section "1.3.3. Java EE component environment example"). JPA does not specify
that the {{EntityManager}} is serializable and the EJB specification only specifies
serialization semantics for passivation-enabled {{@Stateful}} EJB:s (which encourages the
bean provider to not mark an {{EntityManager}} reference as transient, see EJB ยง4.2.1).
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