i am using TomEE 7.0.3 which ships with OpenJPA 2.4.2. the database is
MySQL
i want to store a String (MySQL text column) in the database but use
JAXB to marshal and unmarshal the POJOs. the main class is annotated
with @XmlRootElement. it is also serializable, as are the children objects.
i tried to use javax.persistence.Converter specifically
javax.persistence.AttributeConverter but it just gives
org.apache.openjpa.persistence.ArgumentException - No registered
metadata for type "class
uk.me.kissy.sales.entities.jpa.LeadScriptConverter". This can happen if
this class has not been annotated as a persistent entity or specified in
the persistence unit (ex: in the orm.xml).
i had the class listed in the persistence.xml. maybe 2.4.2 is only JPA 2.0?
then i found this article
https://rmannibucau.wordpress.com/2015/06/18/openjpa-and-serialization-or-how-to-replace-attributeconverterof-jpa-2-1-in-jpa-2-0/
and tried Romain's suggestion using @Externalizer and @Factory
(org.apache.openjpa.persistence.Externalizer and
org.apache.openjpa.persistence.Factory). This results in
Caused by: java.io.StreamCorruptedException: invalid stream header:
3C71756F. with and without @Persistent annotating the field
at the bottom of the article i found Struberg's suggestion
https://github.com/rsandtner/openjpa-converter/blob/master/src/main/java/com/github/rsandtner/openjpaconverter/JodaTimeValueHandler.java
and
https://github.com/rsandtner/openjpa-converter/blob/master/src/test/resources/META-INF/persistence.xml#L61.
this loads the POJO correctly but fails to commit the object back to the
database during em.merge and em.persist. there is a gist here
https://gist.github.com/chongma/5510953224939ef9871ff6197de992e6
FYI i am using the deltaspike 1.8.0 @Transactional
org.apache.deltaspike.jpa.api.transaction.Transactional to wrap the
transactions in case that might be interfering.
