Error while persisting a JPA model

Question

I have an error while persisting my data and I have no idea what is the problem there !!

Here is the content of the Persistence.xml

    <persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0">

    <persistence-unit name="manager1" transaction-type="RESOURCE_LOCAL">

        <properties>

            <!--PostgreSQL-->
            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/postgres"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
            <property name="hibernate.connection.username" value="postgres"/>
            <property name="hibernate.connection.password" value="postgres"/>
            <property name="hibernate.archive.autodetection" value="class"/>
            <property name="hibernate.id.new_generator_mappings" value="true"/>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.ejb.metamodel.generation" value="disabled"/>
            <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultComponentSafeNamingStrategy"/>
            <property name="hibernate.show_sql" value="true"/>
        </properties>

    </persistence-unit>

</persistence>

Here is the Rest webservice call:

@GET
@Path("/")
public Response test() {

    EntityManagerFactory emf = Persistence.createEntityManagerFactory("manager1");
    EntityManager em = emf.createEntityManager();

    Member member = new Member("doux");
    em.persist(member);


    em.close();
    emf.close();

    return Response.status(Response.Status.OK).build();
}

and here is the error i've got !! :

message Unknown entity: ca.products.jpa_models.Member

    description Le serveur a rencontré une erreur interne qui l''a empêché de satisfaire la requête.

    exception

    java.lang.IllegalArgumentException: Unknown entity: ca.products.jpa_models.Member
        org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1149)
        ca.products.services.RestServices.test(RestServices.java:41)
        sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        java.lang.reflect.Method.invoke(Method.java:497)
        com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
        com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
        com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
        com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
        com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
        com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
        com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
        com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
        com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
        com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
        com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

score 0 · Accepted Answer · answered Jul 16 '16 at 04:02

I found the solution :

I should declare the link to the class in my persistence.xml since it is not belonging to the same package !!

<class>ca.products.jpa_models.Member</class>

Here is the source :

class : The class element specifies a fully qualified class name that you will map. By default all properly annotated classes and all hbm.xml files found inside the archive are added to the persistence unit configuration. You can add some external entity through the class element though. As an extension to the specification, you can add a package name in the element (eg org.hibernate.eg). Caution, the package will include the metadata defined at the package level (ie in package-info.java), it will not include all the classes of a given package.

Error while persisting a JPA model

1 Answers1