[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6697) EntityManager.persist should through EntityExistsException instead of PersistenceException

[Michael Rudolf (JIRA)]

EntityManager.persist should through EntityExistsException instead of PersistenceException
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                 Key: HHH-6697
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6697
             Project: Hibernate Core
          Issue Type: Bug
          Components: entity-manager
    Affects Versions: 3.6.7
         Environment: Apache Maven 2.2.1 (r801777; 2009-08-06 21:16:01+0200)
Java version: 1.5.0_22
Java home: C:\Program Files\Java\jdk1.5.0_22\jre
Default locale: de_DE, platform encoding: Cp1252
OS name: "windows 7" version: "6.1" arch: "amd64" Family: "windows" 
            Reporter: Michael Rudolf


The persist method of the {{EntityManager}} interface is not implemented according to the specification. If handed an already existing entity, it throws an instance of {{PersistenceException}} instead of {{EntityExistsException}}. The fact that the exception's cause is an instance of {{DuplicateEntityException}} does not help clients to determine the reason for the failure in a vendor-independent fashion. Changing this behavior will most likely not break existing clients, because they often catch instances of {{PersistenceException}}, which will also catch {{EntityExistsException}} instances. However, it will enable clients to detect the reason for the failure and thereby allow for better error reporting to the user. In fact, in case no transaction is running while this call fails, clients can also recover from the failure and queued actions can be committed afterwards.

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