It is probably simplest if we add byte[] as a mapped type inside TranQL
as that will result in the bytes being written to the LOB rather than
having it serialize an array object. I will try to add that mapping over
the weekend.
Having said that, the Serializable converter should work if you are
inserting the LOB using the EJB (and not directly through JDBC). The
stack you sent is from when we decided to roll the transaction back,
there should be another stacktrace in the log showing the true root
cause - can you post that one please.
--
Jeremy
Stefan Schmidt wrote:
Hi,
I am trying to access a (MySQL) MEDIUMBLOB coloumn from a CMP EJB. There
are some tips @ Wiki but I still can't figure it out.
Here are my artefacts:
openejb-jar.xml:
<cmp-field-mapping>
<cmp-field-name>image</cmp-field-name>
<table-column>image</table-column>
<sql-type>BLOB</sql-type>
<type-converter>org.tranql.sql.typeconverter.SerializableConverter</type-converter>
</cmp-field-mapping>
CMP EJB fields:
public byte[] getImage();
public void setImage(byte[] image);
When trying to access this coloumn from my Session EJB :
book.getImage();
I get:
javax.transaction.TransactionRolledbackException: Unable to load data
for field
at
org.openejb.transaction.ContainerPolicy$TxRequired.invoke(ContainerPolicy.java:126)
at
org.openejb.transaction.TransactionContextInterceptor.invoke(TransactionContextInterceptor.java:80)
at
org.openejb.SystemExceptionInterceptor.invoke(SystemExceptionInterceptor.java:82)
at org.openejb.GenericEJBContainer.invoke(GenericEJBContainer.java:234)
at
org.openejb.proxy.EJBMethodInterceptor.intercept(EJBMethodInterceptor.java:129)
at
org.openejb.proxy.EntityEJBObject$$EnhancerByCGLIB$$227af363.getImage(<generated>)
at com.ibm.dw.bookshop.ejb.BookShopBean.getBooks(BookShopBean.java:135)
...
Do I have to write my own /Type**Converter to get it right?
Could anyone provide a short example on this (preferably write it on the
wiki so everyone can see it)?
The wiki link:
http://wiki.apache.org/geronimo/Working_with_Enterprise_JavaBeans
Thanks,
Stefan
/
