Problems with injection of persistence context.

[adamkoprowski]

Hello,

I'm running into problems with injection for persistence context. If in a session bean I do:

@PersistenceContext private EntityManager em

everything is fine, however if in the Seam component I do:

@In(create=true) EntityManager em

the application breaks up and I get:

Caused by: org.jboss.seam.RequiredException: In attribute requires value for component: newAuction.em
 at org.jboss.seam.Component.getInstanceToInject(Component.java:1882)
 at org.jboss.seam.Component.injectFields(Component.java:1348)
 at org.jboss.seam.Component.inject(Component.java:1118)
 at org.jboss.seam.interceptors.BijectionInterceptor.bijectNonreentrantComponent(BijectionInterceptor.java:76)
 at org.jboss.seam.interceptors.BijectionInterceptor.bijectComponent(BijectionInterceptor.java:58)
 ...

Any ideas what may be wrong? I was thinking that maybe it's because I'm using Trinidad and according to the documentation I had to turn off the Seam view handler in web.xml (http://wiki.apache.org/myfaces/Facelets_with_Trinidad)

<view-handler>org.jboss.seam.ui.facelet.SeamFaceletViewHandler</view-handler>

When I keep it indeed I get a Trinidad error:

java.lang.IllegalStateException: No RenderingContext
 at org.apache.myfaces.trinidad.render.CoreRenderer.encodeBegin(CoreRenderer.java:159)
 at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeBegin(UIXComponentBase.java:667)

Can it has something to do with that? Any help appreciated!

Cheers,
Adam Koprowski

[pmuir]

Post your components.xml

[adamkoprowski]

Here it goes:

components.xml:

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
 xmlns:core="http://jboss.com/products/seam/core"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation=
 "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-1.1.xsd
 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-1.1.xsd">

 <core:init debug="true" jndi-pattern="@jndiPattern@"/>

 <core:manager concurrent-request-timeout="500"
 conversation-timeout="120000"
 conversation-id-parameter="cid"
 conversation-is-long-running-parameter="clr"/>

 <core:pages no-conversation-view-id="/home.xhtml"/>

 <core:managed-persistence-context name="entityManager"
 persistence-unit-jndi-name="java:/youdoEntityManagerFactory"/>

 <core:ejb installed="@embeddedEjb@"/>
</components>

persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
 version="1.0">

 <persistence-unit name="youdo">
 <provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/youdoDatasource</jta-data-source>
 <properties>
 <property name="hibernate.hbm2ddl.auto" value="update"/>
 <property name="hibernate.cache.use_query_cache" value="true"/>
 <property name="hibernate.show_sql" value="false"/>
 <property name="jboss.entity.manager.factory.jndi.name" value="java:/youdoEntityManagerFactory"/>
 </properties>
 </persistence-unit>

</persistence>

[pmuir]

There's your problem, you've called the component entityManager but are trying to inject it as em. Remember Seam injects by variable name NOT class/interface.

[adamkoprowski]

Remember Seam injects by variable name NOT class/interface.

Ups, I didn't know that. Sorry, I'm a newbie to Seam and the manual seems to go rather smoothly over such technicalities... Thanks a lot for help!
Adam