Unable to persist with entity manager using sesame module and sesame server 4

[Xavier Ñauñay]

Hi, I have compiled the develop branch of Mike's Empire repo, and also both Complexible utils. Then, I have recreated successfully the example project using an OpenRdfEmpireModule and Sesame Server 4.

Now, I am able to find and query the data in my sesame server, but when I try to persist I get javax.persistence.PersistenceException: java.lang.NullPointerException in the EntityManager.

This is my properties file:

0.name = books

0.factory = sesame

0.url = http://localhost:8080/openrdf-sesame/

0.repo = books

Anyone have idea on what could be wrong? Any help would be really appreciated.

[Michael Grove]

On Thu, Mar 3, 2016 at 3:22 PM, Xavier Ñauñay <xavie...@gmail.com> wrote:

Hi, I have compiled the develop branch of Mike's Empire repo, and also both Complexible utils. Then, I have recreated successfully the example project using an OpenRdfEmpireModule and Sesame Server 4.

Now, I am able to find and query the data in my sesame server, but when I try to persist I get javax.persistence.PersistenceException: java.lang.NullPointerException in the EntityManager.

I'd be easier to help if you provided the stack trace.

Cheers,

Mike

 

This is my properties file:

0.name = books

0.factory = sesame

0.url = http://localhost:8080/openrdf-sesame/

0.repo = books

Anyone have idea on what could be wrong? Any help would be really appreciated.

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[Xavier Ñauñay]

Here is the stack trace, but there isn't more info:

Exception in thread "main" javax.persistence.PersistenceException: java.lang.NullPointerException

at com.clarkparsia.empire.impl.EntityManagerImpl.cascadeOperation(EntityManagerImpl.java:533)

at com.clarkparsia.empire.impl.EntityManagerImpl.persist(EntityManagerImpl.java:375)

at com.ontology.test.Main.main(Main.java:73)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

Caused by: java.lang.NullPointerException

at com.clarkparsia.empire.impl.EntityManagerImpl$MergeCascade.cascade(EntityManagerImpl.java:544)

at com.clarkparsia.empire.impl.EntityManagerImpl$CascadeAction.test(EntityManagerImpl.java:594)

at com.clarkparsia.empire.impl.EntityManagerImpl.cascadeOperation(EntityManagerImpl.java:530)

... 7 more

Cheers,

Xavier

[Michael Grove]

On Thu, Mar 3, 2016 at 4:05 PM, Xavier Ñauñay <xavie...@gmail.com> wrote:

Here is the stack trace, but there isn't more info:

Exception in thread "main" javax.persistence.PersistenceException: java.lang.NullPointerException

at com.clarkparsia.empire.impl.EntityManagerImpl.cascadeOperation(EntityManagerImpl.java:533)

at com.clarkparsia.empire.impl.EntityManagerImpl.persist(EntityManagerImpl.java:375)

at com.ontology.test.Main.main(Main.java:73)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

Caused by: java.lang.NullPointerException

at com.clarkparsia.empire.impl.EntityManagerImpl$MergeCascade.cascade(EntityManagerImpl.java:544)

at com.clarkparsia.empire.impl.EntityManagerImpl$CascadeAction.test(EntityManagerImpl.java:594)

at com.clarkparsia.empire.impl.EntityManagerImpl.cascadeOperation(EntityManagerImpl.java:530)

... 7 more

After I fixed an incorrect check for language literals [1] the example ran just fine.

If you can isolate an example that reproduces the NPE, I can take a look.

Cheers,

Mike

[1] https://github.com/mhgrove/Empire/commit/fa9384e5bfc2a730c77080359e13477538fb1dd5

[Xavier Ñauñay]

I pull your changes, but nothing appears to change, I have the test project code here:

https://github.com/xavierxc14/EmpireExample.git