CODEWITHSUNDEEP
javajpaejbentitymanager
Buzz2Buzz
Buzz2Buzz

Reputation: 11

No Persistence Provider for EntityManager named foo

Yes I've already searched here for this question but I have this problem after the researches.

So, I'm making a simple standalone project, containing only Entities and DAOs. I'm using IntelliJ.

EDIT: My DB connection informations are good, I'm sure. And I've got another project (GWT) and I'm using the same method -> it works

My META-INF folder is in the root src folder, so this is my persistence.xml:

`<persistence-unit name="jpa">
    <!--<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>-->
    <class>ejbpersistance.entities.User</class>
    <class>ejbpersistance.entities.Comment</class>
    <class>ejbpersistance.entities.Article</class>
    <properties>
        <property  name="javax.persistence.jdbc.url"  value="jdbc:mysql://localhost:3306/ejb"/>
        <property  name="javax.persistence.jdbc.user"  value="root"/>
        <property  name="javax.persistence.jdbc.password"  value="root"/>
        <property  name="javax.persistence.jdbc.driver"  value="com.mysql.jdbc.Driver"/>
    </properties>
</persistence-unit>`

and this is my code:

public EntityManagerFactory getEntityManagerFactory() {
    if(emf == null)
        emf = Persistence.createEntityManagerFactory("jpa");
    return emf;
}

I tried with Hibernate provider, Eclipse provider but always this problem. Can someone help me ? And if I missed something in another topic concerning this issue, I apologize for the time loss.

Upvotes: 1

Views: 891

Answers (2)

Olaf Dietsche
Olaf Dietsche

Reputation: 74028

Make sure persistence.xml is in the META-INF directory and the class path includes the META-INF parent directory.

You also didn't show the complete persistence.xml. The surrounding <persistence> tag must include the proper namespace, e.g. 

<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence">
...
</persistence>

Upvotes: 1

MrOverflow
MrOverflow

Reputation: 423

The location of the persistence unit is the issue here.

  1. check if persistence.xml is in your classpath: If it is non-Java EE application(j2SE)

    The jar file or directory whose META-INF directory contains the persistence.xml file is termed the root of the persistence unit.please check classpath location in your IDE, Eclipse: Project Properties -> Java Build Path -> ****.

  2. check if hibernate provider is in your classpath once you can try to uncomment the provider line in your P.xml file org.eclipse.persistence.jpa.PersistenceProvider</provider>-->

Thanks

Upvotes: 1

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