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POpersisting a JSON string to OrientDB using Datanucleus without enhancer
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2012-11-20T20:00:57.340
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2012-11-20T20:02:11.393
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I am trying to persist a json string (myobject.toJson() gives me my object in json) to orientdb. But I am hitting with "org.datanucleus.exceptions.ClassNotPersistableException: The class "java.lang.String" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found." How do I get around this? Thanks Gopi here is error stack <blockquote> java.lang.IllegalArgumentException: Type ("java.lang.String") is not that of an entity but needs to be for this operation at org.datanucleus.api.jpa.JPAEntityManager.assertEntity(JPAEntityManager.java:1330) at org.datanucleus.api.jpa.JPAEntityManager.persist(JPAEntityManager.java:529) at com.x.myclass.receive(Myclass.java:90) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) Caused by: org.datanucleus.exceptions.ClassNotPersistableException: The class "java.lang.String" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found. at org.datanucleus.ObjectManagerImpl.assertClassPersistable(ObjectManagerImpl.java:5464) at org.datanucleus.api.jpa.JPAEntityManager.assertEntity(JPAEntityManager.java:1326) ... 9 more </blockquote>
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<json><datanucleus>
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persisting a JSON string to OrientDB using Datanucleus without enhancer
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1. COso why are you passing a String to em.persist?
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