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

[Michael Rudolf (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=43845#comment-43845 ] 

Michael Rudolf commented on HHH-6697:
-------------------------------------

Added Pull Request: https://github.com/hibernate/hibernate-core/pull/178

> EntityManager.persist should through EntityExistsException instead of PersistenceException
> ------------------------------------------------------------------------------------------
>
>                 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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