我简直无法从ProfileDBUtil注入EntityManagerFactory对象到ProfileManager类中,我实际上应用事务来查找数据库中的条目,或者更新一行等等。JPA createEntityManager NPE JtaStatusHelper.getStatus
createEntityManager()方法抛出在条目结尾处指定的异常。
奇怪的是,同一段代码适用于UAT环境,而SIT环境却失败。两种环境的所有配置都相同。类加载器顺序,共享库引用,模块类加载器是相同的。 这两种环境在其文件系统中都有必要的jar,并且似乎在运行时成功加载。
这个问题的根本原因是什么?
public class ProfileDBUtil {
private static final String PERSISTENCE_UNIT = "com.profile.userdb";
public boolean loadProfile(String memberID) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
ProfileManager upm = new ProfileManager(emf);
List <Profile> ProfileList = upm.searchProfile(memberID);
}
}
@SuppressWarnings("unchecked")
@JPAManager(targetEntity = com.profile.userdb.model.Profile.class)
public class ProfileManager {
private EntityManagerFactory emf;
public ProfileManager() {
}
public ProfileManager(EntityManagerFactory emf) {
this.emf = emf;
}
public void setEntityManagerFactory(EntityManagerFactory emf) {
this.emf = emf;
}
private EntityManager getEntityManager() {
if (emf == null) {
throw new RuntimeException("The EntityManagerFactory is null. This must be passed in to the constructor``");
}
return emf.createEntityManager(); // THIS FAILS
}
}
Log trace;
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:73)
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.isActive(JtaStatusHelper.java:115)
at org.hibernate.engine.transaction.internal.jta.CMTTransaction.join(CMTTransaction.java:149)
at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1207)
at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:176)
at org.hibernate.ejb.EntityManagerImpl.<init>(EntityManagerImpl.java:89)
at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:125)