30.12. Special components
Certain Seam component classes can be installed multiple times under names specified in the Seam configuration. For example, the following lines in
components.xml install and configure two Seam components:
<component name="bookingDatabase"
class="org.jboss.seam.persistence.ManagedPersistenceContext">
<property name="persistenceUnitJndiName">
java:/comp/emf/bookingPersistence
</ property>
</component>
<component name="userDatabase"
class="org.jboss.seam.persistence.ManagedPersistenceContext">
<property name="persistenceUnitJndiName">
java:/comp/emf/userPersistence
</ property>
</component>
The Seam component names are
bookingDatabase and userDatabase.
- <entityManager>,
org.jboss.seam.persistence.ManagedPersistenceContext - A manager component for a conversation-scoped, managed
EntityManagerwith an extended persistence context.- <entityManager>.entityManagerFactory — a value binding expression that evaluates to an instance of
EntityManagerFactory.<entityManager>.persistenceUnitJndiName — the JNDI name of the entity manager factory. By default, this isjava:/.<managedPersistenceContext>
- <entityManagerFactory>,
org.jboss.seam.persistence.EntityManagerFactory - Manages a JPA
EntityManagerFactory. This is most useful when using JPA outside of an environment with EJB3 support.entityManagerFactory.persistenceUnitName— the name of the persistence unit.
See the API JavaDoc for further configuration properties. - <session>,
org.jboss.seam.persistence.ManagedSession - A manager component for a conversation-scoped, managed Hibernate
Session.- <session>.sessionFactory — a value binding expression that evaluates to an instance of
SessionFactory.<session>.sessionFactoryJndiName — the JNDI name of the session factory. By default, this isjava:/.<managedSession>
- <sessionFactory>,
org.jboss.seam.persistence.HibernateSessionFactory - Manages a Hibernate
SessionFactory.<sessionFactory>.cfgResourceName— specifies the path to the configuration file. By default, this ishibernate.cfg.xml.
See the API JavaDoc for further configuration properties. - <managedQueueSender>,
org.jboss.seam.jms.ManagedQueueSender - A manager component for an event scoped managed JMS
QueueSender.- <managedQueueSender>.queueJndiName — the JNDI name of the JMS queue.
- <managedTopicPublisher>,
org.jboss.seam.jms.ManagedTopicPublisher - A manager component for an event-scoped, managed JMS
TopicPublisher.- <managedTopicPublisher>.topicJndiName — the JNDI name of the JMS topic.
- <managedWorkingMemory>,
org.jboss.seam.drools.ManagedWorkingMemory - A manager component for a conversation-scoped, managed Drools
WorkingMemory.- <managedWorkingMemory>.ruleBase — a value expression that evaluates to an instance of
RuleBase.
- <ruleBase>,
org.jboss.seam.drools.RuleBase - A manager component for an application-scoped Drools
RuleBase. Note that this does not support dynamic installation of new rules, so it is not appropriate for use in production.- <ruleBase>.ruleFiles — a list of files containing Drools rules.<ruleBase>.dslFile — a Drools DSL definition.
