Long explanation for a critical question:

I was recently browsing the documentation for the weblogic-cmp-jar.xml Deployment Descriptor Reference for Weblogic8.1 and came across something that could wreck my entire Hibernate based implementation. Here is the document:

[url]http://e-docs.bea.com/wls/docs81/ejb/DDreference-cmp-jar.html#1113301
[/url]

I am using several IMAGE columns within Sybase (which are akin to Blobs in Oracle). The above document states that the deployment descriptor for entity beans can include a dbms-column-type that specifies how Weblogic should set IMAGE column data. For sybase it says to use:



setBytes and setBinaryStream are methods of java.sql.PreparedStatement.

Although in development we are not using an XA driver, we are planning to in our production environment.

So my question is: Does Hibernate use setBinaryStream or setBytes to store binary column data?


Hibernate version:2.1.6

Just have a look at the source for the type you are using (this is Open Source, you know). If you need to, you can always use a custom UserType.

Yes, I understand that Hibernate is open source. However, I have my own job to do and was hoping that someone with some knowledge of how the Hibernate code is put together could make an effort to answer my question. I don't have time to try to swallow a mound of code like this every time I have a question about how it works (and I am not alone).

If nothing else, could you give a description of the Hibernate architecture and where I should look in the source?

If you have your own job to do, and can't afford some time to solve your problems, you should probably consider paid support ...

As I said, look at the type you are using in your mapping, if its binary, check net.sf.hibernate.BinaryType where your problem is configurable by setting the global property hibernate.jdbc.use_streams_for_binary

Thank you. That's all I needed in the first place. I was not aware that that env setting existed.

Just an FYI for the general populace:

After looking at the source, the 'hibernate.jdbc.use_streams_for_binary' defaults to 'false' and the setBytes method of PreparedStatement will be used by default....so I had nothing to worry about!