4 Replies Latest reply on Aug 7, 2015 5:17 AM by manarh

object is not an instance of declaring class

vata2999 Aug 1, 2013 11:54 AM

I'm using Seam2.3.Final, Jboss7.1.1Final.

I've created a Jboss Datasource named PostgresDS.

my 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_2_0.xsd" 
             version="2.0">
   <persistence-unit name="omidbizDatabase">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/PostgresDS</jta-data-source>
      <properties>
         <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
         <property name="hibernate.show_sql" value="true"/>
         <!-- These are the default for JBoss EJB3, but not for HEM: -->
<!--          <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/> -->
         <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/omidbizEntityManagerFactory"/>
      </properties>
   </persistence-unit>
</persistence>

my components.xml

<core:init jndi-pattern="java:/omidbizEntityManagerFactory" debug="true" distributable="false"/>

normally, I guess as I remember in Seam 2.2 this should work but I get this exception :

Caused by: java.lang.IllegalArgumentException: Could not invoke method by reflection: Synchronizations.afterTransactionBegin() on: org.hibernate.ejb.EntityManagerFactoryImpl
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:32) [jboss-seam.jar:2.3.1.Final]
    at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32) [jboss-seam.jar:2.3.1.Final]
    at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76) [jboss-seam.jar:2.3.1.Final]
    at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) [jboss-seam.jar:2.3.1.Final]
    at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54) [jboss-seam.jar:2.3.1.Final]
    at org.javassist.tmp.java.lang.Object_$$_javassist_seam_1.afterTransactionBegin(Object_$$_javassist_seam_1.java)
    at org.jboss.seam.transaction.UTTransaction.begin(UTTransaction.java:40) [jboss-seam.jar:2.3.1.Final]
    at org.jboss.seam.jsf.SeamPhaseListener.begin(SeamPhaseListener.java:597) [jboss-seam.jar:2.3.1.Final]
    ... 39 more
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_38-ea]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_38-ea]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_38-ea]
    at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_38-ea]
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:22) [jboss-seam.jar:2.3.1.Final]
    ... 46 more

1. Re: object is not an instance of declaring class

manarh Aug 28, 2013 3:11 AM (in response to vata2999)
Omid,

your components.xml is wrong with jndi-pattern attribute value. You need to have there JNDI to your bound EJBs and not your Entity Manager Factory.
Something like
<core:init jndi-pattern="java:app/${project.name}.jar/#{ejbName}" debug="true" distributable="false"/>

Replace ${project.name} with your deployed application EJB name or just look at server.log where are all bound EJB JNDIs.
Actions
2. Re: object is not an instance of declaring class

jr_rodriguez_l Aug 6, 2015 11:28 AM (in response to manarh)

Hi Marek,
I'm getting the same error, my componentes.xml has this configuration:

<core:init debug="@debug@" jndi-pattern="@jndiPattern@"/>
   <core:manager concurrent-request-timeout="60000"
                 conversation-timeout="120000"
                 conversation-id-parameter="cid"
                 parent-conversation-id-parameter="pid"/>
   
   <web:hot-deploy-filter url-pattern="*.seam"/>
   

   <persistence:managed-persistence-context name="entityManager" auto-create="true"
     entity-manager-factory="@seamEmfRef@"
                      persistence-unit-jndi-name="@puJndiName@"/>

What I must change, can you help me please?
Actions
3. Re: object is not an instance of declaring class

vata2999 Aug 6, 2015 1:38 PM (in response to jr_rodriguez_l)

this configuration no longer works on jboss as 7 please look at the one on the seam examples for correct configuration . as far as I recall it was related to ejbtimer service that needs to be defined manually in components.xml
Actions
4. Re: object is not an instance of declaring class

manarh Aug 7, 2015 5:17 AM (in response to jr_rodriguez_l)

Juan,

Omid's Re: object is not an instance of declaring class response is almost right, even it depends on your build system. Those @something@ is a token filtered by build system or by Seam if you have components.properties file in your application. Look for instance here https://github.com/seam2/jboss-seam/blob/Seam_2_2/examples/jpa/resources-jboss/WEB-INF/components.xml#L21

If you use Maven as Seam 2.3 is, then get your inspiration from jboss-seam/pom.xml at Seam_2_3 · seam2/jboss-seam · GitHub and https://github.com/seam2/jboss-seam/blob/Seam_2_3/examples/booking/booking-web/src/main/webapp/WEB-INF/components.xml#L13
Or you can replace tokens with real value like we have in Contact list Example at jboss-seam/components.xml at f3077fee9d04b2b3545628cd9e6b58c859feb988 · seam2/jboss-seam · GitHub

And it is also true that on JBoss AS 7 and newer versions (like Wildfly) is required to have additional 2 lines there to be compatible with new JNDI Rule Syntax like here jboss-seam/components.xml at Seam_2_3 · seam2/jboss-seam · GitHub
Actions

Go to original post