Hi
I noticed the same thing but there might also be two person classes in the
persistence context.
trial.jpa.entities.Person with alias (name in JPA) Person
and
ak.jpa.entities.Person which may have a different alias - a subclass is
created as shown in the trace.
If the application intends to use the first "Person class" then you should
update the query. If it intends to use the second "Person class" the problem
may be that it's not included in the list of classes in Persistence.xml.
-Mike
On Tue, Jun 24, 2008 at 9:10 PM, Kevin Sutter <[EMAIL PROTECTED]> wrote:
> At first blush, it looks like your query has "person" referenced when it
> should have "Person". According to the error message, "Person" is defined,
> but not "person". Take a look at your query.
>
> Kevin
>
> On Tue, Jun 24, 2008 at 4:13 PM, get_it_done <[EMAIL PROTECTED]>
> wrote:
>
> >
> > Hello,
> > I am using Spring 2.5 and OpenJPA and MySQL. When I try to persist
> > an entity, I get the following exception.
> >
> > 09 base INFO [main] openjpa.Runtime - Starting OpenJPA 1.0.1
> > 140 base INFO [main] openjpa.jdbc.JDBC - Using dictionary class
> > "org.apache.openjpa.jdbc.sql.MySQLDictionary".
> > 687 base INFO [main] openjpa.Enhance - Creating subclass for "[class
> > ak.jpa.entities.Person]". This means that your application will be less
> > efficient and will consume more memory than it would if you ran the
> OpenJPA
> > enhancer. Additionally, lazy loading will not be available for one-to-one
> > and many-to-one persistent attributes in types using field access; they
> > will
> > be loaded eagerly instead.
> > Exception in thread "main" <openjpa-1.0.1-r420667:592145 fatal user
> error>
> > org.apache.openjpa.persistence.ArgumentException: Could not locate
> metadata
> > for the class using alias "person". This could mean that the OpenJPA
> > enhancer or load-time weaver was not run on the type whose alias is
> > "person". Registered alias mappings: "{person=null, Person=[class
> > trial.jpa.entities.Person]}"
> > at
> >
> >
> org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:362)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getClassMetaData(JPQLExpressionBuilder.java:169)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.resolveClassMetaData(JPQLExpressionBuilder.java:147)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:216)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:186)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateType(JPQLExpressionBuilder.java:179)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.access$500(JPQLExpressionBuilder.java:66)
> > at
> >
> >
> org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder$ParsedJPQL.populate(JPQLExpressionBuilder.java:1678)
> > at
> > org.apache.openjpa.kernel.jpql.JPQLParser.populate(JPQLParser.java:55)
> > at
> >
> >
> org.apache.openjpa.kernel.ExpressionStoreQuery.populateFromCompilation(ExpressionStoreQuery.java:148)
> > at
> > org.apache.openjpa.kernel.QueryImpl.newCompilation(QueryImpl.java:652)
> > at
> >
> >
> org.apache.openjpa.kernel.QueryImpl.compilationFromCache(QueryImpl.java:633)
> > at
> >
> >
> org.apache.openjpa.kernel.QueryImpl.compileForCompilation(QueryImpl.java:599)
> > at
> >
> org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:661)
> > at
> > org.apache.openjpa.kernel.QueryImpl.getOperation(QueryImpl.java:1487)
> > at
> >
> >
> org.apache.openjpa.kernel.DelegatingQuery.getOperation(DelegatingQuery.java:123)
> > at
> > org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:227)
> > at
> >
> >
> org.apache.openjpa.persistence.QueryImpl.getSingleResult(QueryImpl.java:300)
> > at
> > ak.jpa.daos.PersonDaoJpaImpl.findPersonById(PersonDaoJpaImpl.java:50)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at
> >
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> > at
> >
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > at java.lang.reflect.Method.invoke(Method.java:585)
> > at
> >
> >
> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:301)
> > at
> >
> >
> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
> > at
> >
> >
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
> > at
> >
> >
> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
> > at
> >
> >
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
> > at
> >
> >
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> > at $Proxy9.findPersonById(Unknown Source)
> > at
> >
> >
> trial.jpa.services.PersonServiceImpl.findPersonById(PersonServiceImpl.java:36)
> > at trial.jpa.clients.MysqlClient.main(MysqlClient.java:18)
> >
> >
> > What is "This could mean that the OpenJPA enhancer or load-time weaver
> was
> > not run on the type whose alias is "person". ". I have configured
> > SimpleLoadTimeWeaver in springs application context file.
> >
> > Any thing else I need to configure
> > --
> > View this message in context:
> >
> http://www.nabble.com/org.apache.openjpa.persistence.ArgumentException%3A-Could-not-locate-metadata-for-the-class-using-alias-%22person%22.-This-could-mean-that-the-OpenJPA-enhancer-or-load-time-weaver-was-not-run-on-the-type-whose-alias-tp18100208p18100208.html
> > Sent from the OpenJPA Users mailing list archive at Nabble.com.
> >
> >
>
