I have a Hibernate running in my project and I am trying to set it up to be switchable to EclipseLink. I have added all EclipseLink classes in Maven, but it seems that they are not running at all. When I try to run the project, it ends up with:
Exception in thread "main" javax.persistence.PersistenceException:
No Persistence provider for EntityManager named test
My persistence.xml file: https://gist.github.com/1676280
The pom.xml file with the dependencies: https://gist.github.com/1676282
Once I switch the providers in the persistence.xml back to Hibernate, everything works correctly.
I see one significant issue and a couple of minor problems in your persistence.xml.
The big issue is the your persistence unit is named "org.knyttl" but the error message says persistence unit "test" can't be found. If you're looking for "test" and the pu is "org.knyttl" then you're not going to find anything. :)
The minor issues are that you have a couple of the EclipseLink properties misnamed. "javax.persistence.target-database" should be "eclipselink.target-database" and "javax.persistence.logging.level" should be "eclipselink.logging.level".
Shaun
Related
I'm having hibernate3.jar and hibernate-core-4.2.0.CR1.jar in my classpath and I'm using Spring 3.1.3 version. Code got compiles sucessfully but while runtime I'm getting following error
2014-10-28 10:51:25,174 DEBUG [RMI TCP Connection(2)-10.126.30.203] -
Target method failed for RemoteInvocation: method name
'getPriceByKeys'; parameter types [java.util.List, java.util.Date]
java.lang.NoSuchMethodError:
org.hibernate.SessionFactory.openSession()Lorg/hibernate/Session;
I google it but not find any solution. Please note : My project needs hibernate3.jar but at the same time my project dependent on some other 3rd party jar which inturn using hibernet4.2.0 jar.
Any help Pls ??
You need to remove multiple hibernate JAR files from your classpath. Without doing this, your application may not work as you expect; which means you need to migrate the hibernate version of your application from 3 to 4.1.
Although Spring 3.1 uses Hibernate 3 JAR files, you can still migrate to Hibernate 4. Check out Spring blog gives a small tutorial to do so.
Migrating to Spring 3.1 and Hibernate 4.1
As part of the Core-Spring course, we have a lab application that we
use to show how to integrate Spring and JPA/Hibernate together. We
have just upgraded it to Spring 3.1 / Hibernate 4.1, and thought we
should share a few tips.
Just an update. The cause of problem is , I'm having two spring-context xml files in project (one of my project and one related to another module that I'm integrating). I'm loading context xmls from two different classes. So one of the DAO class loaded by one of spring-context xml not getting the hibernate Session.
Later on using import tag, I included 2nd spring application context file in 1st application context file and then loaded a Single application context file from the class. It solved the error.
Thanks,
I am attempting to upgrade an appliaction from Hibernate 3 to Hibernate 4. The application uses ehcache.
When upgrading to Hibernate 4.2.0.Final I added a dependency on hibernate-ehcache-4.2.0.Final as suggested.
When I started up the application I received the following error:
Caused by: java.lang.NoClassDefFoundError: org/hibernate/cache/TimestampsRegion
According to http://www.javacraft.org/2012/03/migrate-to-hibernate-4-ehcache.html I should remove the dependency on ehcache-core and only use the hibernate provided jar to resolve this error.
Now, if I follow these instructions and remove this dependency my application which uses the net.sf.ehcache.CacheManager no-longer compiles.
// For example, this no-longer works
CacheManager manager = CacheManager.getInstance();
So my question is, can I use both libraries and continue working as before (Without updating the app), or do I have to change the app, in which case does hibernate-ehcache even provide the functionality required to access the cache?
When using Hibernate 4 you have to use the org.hibernate packaged classes.
The net.sf.ehcache ones are target at Hibernate 3.
Form 4 they have ported to 4 within the Hibernate repo directly (which is the most sensible thing in our opinion).
So using org.hibernate.cache.ehcache.EhCacheRegionFactory should solve your problem.
Check if there any .properties file in your project like hsqlDatabaseConfig.properties, try to update the property as below
sessionFactory.hibernateProperties = hibernate.cache.use_second_level_cache=true\n\
hibernate.cache.use_query_cache=true\n\
hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.internal.EhcacheRegionFactory\n\
I'm having this strange error with JBoss. It's strange because it's looking for some old projects that aren't even related to my current project and are also deleted from my workspace in eclipse.
When I try to get the current project to run, I get this error:
DEPLOYMENTS MISSING DEPENDENCIES:
Deployment "jboss.j2ee:ear=BibliotheekEAR.ear,jar=BibliotheekEJB.jar,name=Bibliotheek,service=EJB3" is missing the following dependencies:
Dependency "" (should be in state "Described", but is actually in state "** UNRESOLVED Demands 'persistence.unit:unitName=BibliotheekEAR.ear/BibliotheekJPA.jar#BibliotheekJPA' **")
Deployment "jboss.j2ee:ear=BibliotheekEAR.ear,jar=BibliotheekEJB.jar,name=Bibliotheek,service=EJB3_endpoint" is missing the following dependencies:
Dependency "jboss.j2ee:ear=BibliotheekEAR.ear,jar=BibliotheekEJB.jar,name=Bibliotheek,service=EJB3" (should be in state "Configured", but is actually in state "PreInstall")
DEPLOYMENTS IN ERROR:
Deployment "" is in error due to the following reason(s): ** UNRESOLVED Demands 'persistence.unit:unitName=BibliotheekEAR.ear/BibliotheekJPA.jar#BibliotheekJPA' **
Deployment "persistence.unit:unitName=BibliotheekEAR.ear/BibliotheekJPA.jar#BibliotheekJPA" is in error due to the following reason(s): org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
Any ideas?
I have deleted all these projects, so I don't know why it's looking for them...
I have deleted all these projects, so I don't know why it's looking for them
Deleted from where? Maybe double check that they aren't any remaining traces under the deploy or tmp directories of the server configuration you're using.
See also
2.1. Server Structure
It seems that you haven't set the Hibernate database dialect property correctly for the database your using in your application. Try setting your database dialect in your persistence.xml file like this:
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
In case you're using MySQL. Here is a list of the most common hibernate dialects used.
GWT with JPA
There are two projects in my eclipse workspace, let's name them:
-JPAProject
-GWTProject
JPAProject contains JPA configuration stuff (persistence.xml, entity classes and so on). GWTProject is an examplary GWT project (taken from official GWT tutorial).
Both projects work fine alone. That is, I can create EMF (EntityManagerFactory) in JPAProject and get entities from the database. GWTProject works fine too, I can run it, fill the field text in the browser and get the response.
My goal is to call JPAProject from GWTProject to get entities. But the problem is that when calling DAO, I get the following exception:
[WARN] Server class 'com.emergit.service.dao.profile.ProfileDaoService' could not be found in the web app, but was found on the system classpath
[WARN] Adding classpath entry 'file:/home/maliniak/workspace/emergit/build/classes/' to the web app classpath for this session
[WARN] /gwttest/greet
javax.persistence.PersistenceException: No Persistence provider for EntityManager named emergitPU
at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
at com.emergit.service.dao.profile.JpaProfileDaoService.<init>(JpaProfileDaoService.java:19)
at pl.maliniak.server.GreetingServiceImpl.<init>(GreetingServiceImpl.java:21)
...
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
[ERROR] 500 - POST /gwttest/greet (127.0.0.1) 3812 bytes
I guess that the warnings at the beginning can be omitted for now.
Do you have any ideas? I guess I am missing some basic point. All hints are highly appreciated.
Update: My persistence provider is well defined, the JPA project works well by itself.
I guess it's classpath related problem too. When running the GWT project, in WEB-INF/lib there is only gwt-servlet.jar.
Do you think that making custom Ant file to build whole thing up is the only solution (i.e. make jar out of the JPA project and copying it to WEB-INF/lib)? Or is there any Eclipse solution, so I could set the GWT project properties properly so GWT project would know to include persistence.xml file?
Update: OK, I got it working. I tried to put persitence.xml everywhere in war/WEB-INF where it was possible, but kept getting 'no persistence provider' error. It turned out that it wasn't about persistence.xml. I didn't copy the eclipselink jar to WEB-INF/lib, so it couldn't find provider class defined in persistence.xml. Copying all the jars did the thing.
Thank you very much Pascal.
Struggling a lot with the same error message, I solved the problem with copying all jars (eclipselink.jar, eclipselink-jpa-modelgen_2.1.0.v20100614-r7608.jar, javax.persistence_1.0.0.jar, javax.persistence_2.0.1.v201006031150.jar) from the EclipseLink zip to the .../war/WEB-INF/lib folder of my GWT project to make everything available for the Jetty in hosted mode.
As you can see from the list of files, I was using EclipseLink 2.1. Please adapt this list to your JPA implementation, if necessary.
Hoping, that this may help you as well.
Do you have a persistence provider declared in your persistence.xml? Something like this (I'm using Hibernate here, adapt it to whatever persistence provider you're using):
<persistence
<persistence-unit name="emergitPU" transaction-type="...">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
...
</persistence-unit>
</persistence>
If you do, then I suspect a classpath problem. Did you package the JPA project correctly in the webapp i.e. in WEB-INF/lib?
An application that has been working well for months has stopped picking up the JPA #Entity annotations that have been a part of it for months. As my integration tests run I see dozens of "org.hibernate.MappingException: Unknown entity: com.whatever.OrderSystem" type errors.
It isn't clear to me what's gone wrong here.
I have no hibernate.cfg.xml file because I'm using the Hibernate Entity Manager. Since I'm exclusively using annotations, there are no .hbm.xml files for my entities. My persistence.xml file is minimal, and lives in META-INF as it is supposed to.
I'm obviously missing something but can't put my finger on it.
I'm using hibernate-annotations 3.2.1, hibernate-entitymanager 3.2.1, persistence-api 1.0 and hibernate 3.2.1. hibernate-commons-annotations is also a part of the project's POM but I don't know if that's relevant.
Is there a web.xml entry that has vanished, or a Spring configuration entry that has accidentally been deleted?
verify in your entity classe that you import javax.persistent.Entity and not org.hibernate.annotations.Entity
I seem to recall I had a similar issue at one time.
Its a long shot, but if you're not already doing this, have you explicitly specified the provider you are using?
<persistence ...>
<persistence-unit ...>
<provider>org.hibernate.ejb.HibernatePersistence</provider> <---- explicit setting
....
</persistence-unit>
</persistence>
Otherwise, I'm not sure?
Is this happening for one specific class (few classes) or all the entity classes. The persistence.xml file has a list of class and or jar files that need to be scanned for #Entity mappings. If it was working earlier you can do a quick diff with the version of persistence.xml that was working correctly. Another issue could be that it is picking up a different persistence.xml file - you can verify this by introducing an error (for e.g., make the xml invalid) in the persistence.xml.