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ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
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design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
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User Reviews

  • Excellent persistence product

  • DataNucleus is a well engineered, well thought out implementation of a well engineered, well thought out Java Persistence Standard (JDO). If you like driving Mercedes, BMW or Volkswagen because they of superior design and engineering even though they aren't as popular as Toyotas or Hyundai's then you'll choose DataNucleus. If you're more of a 'herd mentality' animal then you probably won't ;)

    2 users found this review helpful.
  • 今天我从早上一直玩到现在,按照官方提供的JPA Sample在做,但是一直未测试通过,我不知道是什么原因,下面是报错信息. Exception in thread "main" javax.persistence.PersistenceException: Explicit persistence provider error(s) occurred for "Tutorial" after trying the following discovered implementations: org.datanucleus.api.jpa.PersistenceProviderImpl from provider: org.datanucleus.api.jpa.PersistenceProviderImpl at javax.persistence.Persistence.createPersistenceException(Persistence.java:244) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:186) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:72) at org.datanucleus.samples.jpa.tutorial.Main.main(Main.java:39) Caused by: org.datanucleus.exceptions.NucleusUserException: Errors were encountered when initialising the specified MetaData. See the nested exceptions for details at org.datanucleus.metadata.MetaDataManager.initialiseFileMetaDataForUse(MetaDataManager.java:1055) at org.datanucleus.metadata.MetaDataManager.loadPersistenceUnit(MetaDataManager.java:943) at org.datanucleus.api.jpa.JPAEntityManagerFactory.initialiseNucleusContext(JPAEntityManagerFactory.java:750) at org.datanucleus.api.jpa.JPAEntityManagerFactory.initialise(JPAEntityManagerFactory.java:413) at org.datanucleus.api.jpa.JPAEntityManagerFactory.<init>(JPAEntityManagerFactory.java:376) at org.datanucleus.api.jpa.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:91) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:152) ... 2 more Caused by: org.datanucleus.exceptions.NucleusUserException: Found Meta-Data for class org.datanucleus.samples.jpa.tutorial.Product but this class is not enhanced!! Please enhance the class before running DataNucleus. at org.datanucleus.metadata.MetaDataManager.initialiseClassMetaData(MetaDataManager.java:2402) at org.datanucleus.metadata.MetaDataManager.initialiseFileMetaData(MetaDataManager.java:2353) at org.datanucleus.metadata.MetaDataManager.initialiseFileMetaDataForUse(MetaDataManager.java:1044) ... 8 more

  • A good Java ORM solution

    2 users found this review helpful.
  • Datenucleus is very powerful. Only serious option if you have any interest in using any nosql storage, object stores or column databases.

    2 users found this review helpful.
  • Lo mejor de lo mejor

    2 users found this review helpful.
  • Amazing piece of work! Definitely the best persistence layer for Java.

    2 users found this review helpful.
  • The best Java ORM

    2 users found this review helpful.