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From Larry White <ljw1...@gmail.com>
Subject Re: newbie problem with "enhancement" using Idea 8 and OpenJPA
Date Tue, 27 Oct 2009 20:23:34 GMT
On Tue, Oct 27, 2009 at 4:02 PM, Rick Curtis <curtisr7@gmail.com> wrote:

> Larry -
>
> I haven't used Intellij before so please excuse me if it seems that I'm
> fumbling through the dark here...
>
> Do you see any information logged during the build process or prior to
> running your application that has the following key "openjpa.Enhance"? Is
> there any text that our enhancer ran, but didn't do any work (Search for
> "enhance") ?


I'm not seeing any reference to "enhance" in the build stage.  The only JPA
reference I've seen is text that says "Validating Persistence Module" or
something to that effect.



> What JPA operation were you invoking when you encounter the
> exception above (ie : em.persist() ) ? Hopefully this gets us going in the
> right direction.
>
> Yes, em.persist();


> Since you are new to OpenJPA, take a look at a blog post [1] I wrote a
> while
> back which talks about the enhancement process.
>
> [1]
> http://webspherepersistence.blogspot.com/2009/02/openjpa-enhancement.html
>
> Thanks,
> Rick
>
> On Tue, Oct 27, 2009 at 2:40 PM, Larry White <ljw1001@gmail.com> wrote:
>
> > Hi,
> >
> > I'm working on my first OpenJPA app using the plugin for Intellij Idea 8.
> > I'm getting the error:
> >
> > <openjpa-1.2.1-r752877:753278 nonfatal user error>
> > org.apache.openjpa.persistence.ArgumentException: Attempt to cast
> instance
> > "com.deathrayresearch.server.model.product.Product@1c7e2da" to
> > PersistenceCapable failed.  Ensure that it has been enhanced.
> >
> > I don't know enough about the technology or the plug-in to know even
> > generally what's going wrong. My understanding is that the plugin
> performs
> > the enhancement during each build, but I'm not seeing any errors during
> the
> > build process to indicate that it failed.
> >
> > FWIW, I have not created a table for "Product", under the assumption that
> > it
> > would be generated from the entity class definition.
> >
> > My entity class and persistence.xml are below.
> >
> > Thanks for your help
> >
> > -----------------------------------------------------
> > package com.deathrayresearch.server.model.product;
> > import javax.persistence.*;
> > import java.io.Serializable;
> >
> > @Entity
> > public class Product implements Serializable {
> >
> >    @Id
> >    @GeneratedValue(strategy = GenerationType.IDENTITY)
> >    private long id;
> >
> >    @Basic
> > @Column(nullable = false, length = 30)
> >    private String name;
> >
> >    @Basic
> > @Column(nullable = true, length = 30)
> >    private String description;
> >
> >    public Product() {
> >    }
> >
> >    public Product(String description, String name) {
> >        this.description = description;
> >        this.name = name;
> >    }
> >
> >    public long getId() {
> >        return id;
> >    }
> >
> >    public void setId(long id) {
> >        this.id = id;
> >    }
> >
> >    public String getDescription() {
> >        return description;
> >    }
> >
> >    public void setDescription(String description) {
> >        this.description = description;
> >    }
> >
> >    public String getName() {
> >        return name;
> >    }
> >
> >    public void setName(String name) {
> >        this.name = name;
> >    }
> > }
> >
> > --------------------------------------------------
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <persistence xmlns="http://java.sun.com/xml/ns/persistence"
> version="1.0">
> >
> >    <persistence-unit name="worldview">
> >
> >
> >
>  <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
> >        <properties>
> >            <property name="openjpa.ConnectionURL"
> > value="jdbc:postgresql:worldview"/>
> >            <property name="openjpa.ConnectionDriverName"
> > value="org.postgresql.Driver"/>
> >            <property name="openjpa.ConnectionUserName" value="postgres"/>
> >            <property name="openjpa.ConnectionPassword" value="foobar"/>
> >            <property name="openjpa.Log" value="DefaultLevel=TRACE,
> > Tool=INFO"/>
> >        </properties>
> >    </persistence-unit>
> >
>

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