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Standalone JPA example

 
Greenhorn
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Hi,
I am trying to create a simple JPA example using Java SE 5, Hibernate and MySQL.
I have created a persistence.xml and entity classes but when I run the example, I got the error-


Persistence.xml


Please let me know what is wrong with persistence.xml.

Thanks.
 
Sheriff
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Did you put the persistence.xml file in your META-INF directory ? Is this directory in your CLASSPATH ?
 
subir rastogi
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Yes, persistence.xml is in the classpath.
 
Christophe Verré
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is META-INF in the classpath ?
 
Sheriff
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I haven't played with standalone JPA much, but shouldn't that persistence.xml have an persistence-provider element which points to the Hibernate persistence provider class? Also posting the entire exception stacktrace might also help.
 
Rancher
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Jaikiran Pai wrote:I haven't played with standalone JPA much, but shouldn't that persistence.xml have an persistence-provider element which points to the Hibernate persistence provider class?


Indeed, but if memory serves it's called "<provider>", not "persistence-provider" (unless things have changed since JPA 1.0). You'll also need "<class>" elements for all the classes that should be managed by JPA.
 
Jaikiran Pai
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Lester Burnham wrote:
but if memory serves it's called "<provider>", not "persistence-provider"


Indeed (even in JPA2).
 
subir rastogi
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If I have to add provider class, in case of hibernate, how to find which is the jpa provider class?

thanks
 
Lester Burnham
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The Hibernate documentation.
 
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